This reverts commit 28394c22.

Reason for revert: may be the cause of flakiness on Win10 Debug (NVIDIA) per http://crbug.com/972914 .

Original change's description:
> Revert "Temporarily disable creating D3D debug device."
> 
> This reverts commit 3d544fff.
> 
> Reason for revert: Seems like flakiness is not related.
> 
> Suppress D3D11 test failures uncovered by re-enabling D3D debug device:
> ComputeShaderTest.DispatchCompute
> Texture2DTestES3.TextureImplPropogatesDirtyBits
> D3DTextureTestMS.*
> 
> Also a small fix to ANGLETestBase::checkD3D11SDKLayersMessages
> to clear reported messages, otherwise the failures are also reported
> for tests following the one with the actual failure.
> 
> Original change's description:
> > Temporarily disable creating D3D debug device.
> >
> > To diagnose whether Windows Intel end2end tests flakiness
> > is related to creating debug device and new version of Windows SDK.
> >
> > Bug: angleproject:3153
> > Change-Id: Ica7eae3fe875e22203b6dfd98b83604d66a97737
> > Reviewed-on: https://chromium-review.googlesource.com/c/1476954
> > Reviewed-by: Geoff Lang <geofflang@chromium.org>
> > Commit-Queue: Yuly Novikov <ynovikov@chromium.org>
> 
> Bug: angleproject:3153, angleproject:3493
> Bug: angleproject:3501, angleproject:3512, angleproject:3513
> 
> Change-Id: I232da72aa09c2b9230cf179dd54e1731f8365f8e
> Reviewed-on: https://chromium-review.googlesource.com/c/angle/angle/+/1480854
> Reviewed-by: Yuly Novikov <ynovikov@chromium.org>
> Reviewed-by: Jamie Madill <jmadill@chromium.org>
> Commit-Queue: Yuly Novikov <ynovikov@chromium.org>

TBR=ynovikov@chromium.org,geofflang@chromium.org,jmadill@chromium.org

Change-Id: I38a5cc9bb6ebcd50e97e40cc972a82679e73732a
No-Presubmit: true
No-Tree-Checks: true
No-Try: true
Bug: angleproject:3153, angleproject:3493, angleproject:3501, angleproject:3512, angleproject:3513
Reviewed-on: https://chromium-review.googlesource.com/c/angle/angle/+/1652784Reviewed-by: Kenneth Russell <kbr@chromium.org>
Commit-Queue: Kenneth Russell <kbr@chromium.org>

A new SDK version started throwing on locales that have a code page
section (the part after the dot) that's >= 16 characters long.
That's a system library bug, but for now we need to work around it.

Bug: chromium:972372
Change-Id: I64cee1051e854dac84e8c3c728ce65606b0dc89b
Reviewed-on: https://chromium-review.googlesource.com/c/angle/angle/+/1652016
Commit-Queue: Jamie Madill <jmadill@chromium.org>
Reviewed-by: Jamie Madill <jmadill@chromium.org>

This reverts commit 3d544fff.

Reason for revert: Seems like flakiness is not related.

Suppress D3D11 test failures uncovered by re-enabling D3D debug device:
ComputeShaderTest.DispatchCompute
Texture2DTestES3.TextureImplPropogatesDirtyBits
D3DTextureTestMS.*

Also a small fix to ANGLETestBase::checkD3D11SDKLayersMessages
to clear reported messages, otherwise the failures are also reported
for tests following the one with the actual failure.

Original change's description:
> Temporarily disable creating D3D debug device.
>
> To diagnose whether Windows Intel end2end tests flakiness
> is related to creating debug device and new version of Windows SDK.
>
> Bug: angleproject:3153
> Change-Id: Ica7eae3fe875e22203b6dfd98b83604d66a97737
> Reviewed-on: https://chromium-review.googlesource.com/c/1476954
> Reviewed-by: Geoff Lang <geofflang@chromium.org>
> Commit-Queue: Yuly Novikov <ynovikov@chromium.org>

Bug: angleproject:3153, angleproject:3493
Bug: angleproject:3501, angleproject:3512, angleproject:3513

Change-Id: I232da72aa09c2b9230cf179dd54e1731f8365f8e
Reviewed-on: https://chromium-review.googlesource.com/c/angle/angle/+/1480854Reviewed-by: Yuly Novikov <ynovikov@chromium.org>
Reviewed-by: Jamie Madill <jmadill@chromium.org>
Commit-Queue: Yuly Novikov <ynovikov@chromium.org>

https://chromium.googlesource.com/external/github.com/KhronosGroup/glslang/+log/d3692c701b12..9866ad9195ce


Created with:
  gclient setdep -r ./third_party/glslang/src@9866ad9195ce

The AutoRoll server is located here: https://autoroll.skia.org/r/glslang-angle-autoroll

Documentation for the AutoRoller is here:
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If the roll is causing failures, please contact the current sheriff, who should
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TBR=geofflang@google.com

Change-Id: Iae19d3e8f16004de66cf434bb2ea8f87f89a4e71
Reviewed-on: https://chromium-review.googlesource.com/c/angle/angle/+/1651403Reviewed-by: angle-autoroll <angle-autoroll@skia-public.iam.gserviceaccount.com>
Commit-Queue: angle-autoroll <angle-autoroll@skia-public.iam.gserviceaccount.com>

Bug: chromium:972228,893460

Change-Id: I0c77d19e70c337d70bc55f65f6893d5bbe18407b
Reviewed-on: https://chromium-review.googlesource.com/c/angle/angle/+/1648670Reviewed-by: Bruce Dawson <brucedawson@chromium.org>
Reviewed-by: Jamie Madill <jmadill@chromium.org>
Commit-Queue: Jamie Madill <jmadill@chromium.org>

Logs all debug messages produced by GL and EGL.
This is helpful for debugging when the application does not register a
debug callback.

Validation errors produce log messages with level INFO, and internal
errors produce log messages with level WARN.

Bug: angleproject:3505
Change-Id: I269055aec49e1d77edeedb482fa6873c8f79f853
Reviewed-on: https://chromium-review.googlesource.com/c/angle/angle/+/1645817
Commit-Queue: Jamie Madill <jmadill@chromium.org>
Reviewed-by: Jamie Madill <jmadill@chromium.org>

Rasterizer discard is a feature that allows the graphics pipeline
to skip the fragment shader stage.

Implementing rasterizer discard in Vulkan is as easy as not binding
a fragment shader binary.

Tests for rasterizer discard live in
dEQP-GLES3.functional.rasterizer_discard.*.

Bug: angleproject:3214
Test: dEQP-GLES3.functional.rasterizer_discard.*
Change-Id: I0815df3b70f6f9cdc6c8c87ec4813bb629d8bd5f
Reviewed-on: https://chromium-review.googlesource.com/c/angle/angle/+/1646692
Commit-Queue: Tim Van Patten <timvp@google.com>
Reviewed-by: Shahbaz Youssefi <syoussefi@chromium.org>
Reviewed-by: Jamie Madill <jmadill@chromium.org>

A previous change based on ESSL 1.00 spec had made it an error in all
cases when an extension directive appeared in a shader after the first
non-preprocessor token. However, this is incorrect for WebGL 1.0 so
adding warning case for WebGL.

BUG=chromium:971660

Change-Id: I026fe60e8b1876de65b001b676f7a0552739a20c
Reviewed-on: https://chromium-review.googlesource.com/c/angle/angle/+/1648661Reviewed-by: Jamie Madill <jmadill@chromium.org>
Reviewed-by: Kai Ninomiya <kainino@chromium.org>
Commit-Queue: Tobin Ehlis <tobine@google.com>

Bug: 971977
Change-Id: I2a872bd814e9a356baa3d304e1c352b6a619583e
Reviewed-on: https://chromium-review.googlesource.com/c/angle/angle/+/1649300Reviewed-by: Jamie Madill <jmadill@chromium.org>
Commit-Queue: Shahbaz Youssefi <syoussefi@chromium.org>

Emulated by applying a mask on top of the mask from glSampleMask.

Bug: angleproject:3204
Change-Id: I4c80ab0a3261cbf1b8a43c270fe13c2a247ea663
Reviewed-on: https://chromium-review.googlesource.com/c/angle/angle/+/1639749Reviewed-by: Jamie Madill <jmadill@chromium.org>
Reviewed-by: Geoff Lang <geofflang@chromium.org>
Commit-Queue: Shahbaz Youssefi <syoussefi@chromium.org>

Augment the resolve shaders to be able to stretch and blit too.  The
UtilsVk resolve function is accordingly expanded to include blit.

Bug: angleproject:3200
Change-Id: I30b172a5e388089735ab494f55cbfdc2781a8bf9
Reviewed-on: https://chromium-review.googlesource.com/c/angle/angle/+/1635753
Commit-Queue: Shahbaz Youssefi <syoussefi@chromium.org>
Reviewed-by: Geoff Lang <geofflang@chromium.org>

Will be used for logging GL/EGL debug messages.

Bug: angleproject:3505
Change-Id: I10ff32dd4f9227cabac2f3d9425b0428e7af1398
Reviewed-on: https://chromium-review.googlesource.com/c/angle/angle/+/1648714Reviewed-by: Jamie Madill <jmadill@chromium.org>
Commit-Queue: Jamie Madill <jmadill@chromium.org>

There is some new Android HWUI/SkiaGL code, that (in certain cases)
looks up the underlying Vulkan swapchain that ANGLE created, and adds
an image to it. This causes the next call to vkAcquireNextImageKHR() to
return VK_ERROR_OUT_OF_DATE and requires the swapchain to be recreated.

Bug: angleproject:3480
Test: Use ANGLE on Android and verify apps load correctly.

Change-Id: I21c86035664878e75d6a9dc769546747aa4c8256
Reviewed-on: https://chromium-review.googlesource.com/c/angle/angle/+/1632424
Commit-Queue: Tim Van Patten <timvp@google.com>
Reviewed-by: Jamie Madill <jmadill@chromium.org>
Reviewed-by: Geoff Lang <geofflang@chromium.org>

Some platforms don't want us messing with environ, and these seem to be
equivalent.

Bug: angleproject:3506
Change-Id: I66804e8accc30421c1cd32c0eda750500e3ecb60
Reviewed-on: https://chromium-review.googlesource.com/c/angle/angle/+/1646887Reviewed-by: Jamie Madill <jmadill@chromium.org>
Reviewed-by: Shahbaz Youssefi <syoussefi@chromium.org>
Commit-Queue: Jamie Madill <jmadill@chromium.org>

We remove symbol_visibility_hidden to get better stack traces in debug
builds but it causes ASAN issues with multiply instantiated globals.

BUG=angleproject:3507

Change-Id: I8ec664bf7d9506cc45afb6f864de7b7ba7cbe99b
Reviewed-on: https://chromium-review.googlesource.com/c/angle/angle/+/1648275Reviewed-by: Jamie Madill <jmadill@chromium.org>
Commit-Queue: Geoff Lang <geofflang@chromium.org>

Android will return VK_SUBOPTIMAL_KHR if the orientation of the
screen is not optimial for the orientation of the device.
We were re-creating the swapchain when this happens but we weren't
changing the orientation and would get this return code every
time we call vkQueuePresent and re-create the swapchain each time.
Apparently recreating the swapchain causes visual artifacts on
some devices. Just ignoring VK_SUBOPTIMAL_KHR allows things to
work.
Bug: angleproject:3497

Need to implement proper preRotation support for longterm fix.
Bug: angleproject:3502

Change-Id: I0904eb60b742d24618d502c111510117758a8502
Reviewed-on: https://chromium-review.googlesource.com/c/angle/angle/+/1641206Reviewed-by: Jamie Madill <jmadill@chromium.org>
Reviewed-by: Geoff Lang <geofflang@chromium.org>
Commit-Queue: Courtney Goeltzenleuchter <courtneygo@google.com>

Fixes buffer size calculation when uploading element buffer
to account for 4-byte (uint) indices.

Bug: angleproject:2902
Change-Id: Id70fc0fdffecd0b27995820bd0ad88e4cb61e013
Reviewed-on: https://chromium-review.googlesource.com/c/angle/angle/+/1648325Reviewed-by: Jamie Madill <jmadill@chromium.org>
Commit-Queue: Jamie Madill <jmadill@chromium.org>

Previously ContextVk owned the descriptor pools. We were trying to
maximize descriptor reuse to conserve memory. However the default
uniforms would have no possible sharing. And because uniform buffers
are usually unique to a program it's likely there would be less reuse.

Image descriptors could be shared. But with the advent of a descriptor
cache in the Program it becomes difficult to manage the cache through
descriptor pool recycling. Moving the pools into the Program simplifies
the cache management. We could look at adding back more reuse in the
future.

Also shifts driver uniforms back into the end of the descriptor sets
to make indexing into the Program's descriptor pools simpler.

Bug: angleproject:3117
Change-Id: I52bb49cf322d944ad7cf08791efdf24b7fe573ce
Reviewed-on: https://chromium-review.googlesource.com/c/angle/angle/+/1644775
Commit-Queue: Jamie Madill <jmadill@chromium.org>
Reviewed-by: Jamie Madill <jmadill@chromium.org>

https://chromium.googlesource.com/external/github.com/KhronosGroup/glslang/+log/2f4a8dfd3a59..d3692c701b12


Created with:
  gclient setdep -r ./third_party/glslang/src@d3692c701b12

The AutoRoll server is located here: https://autoroll.skia.org/r/glslang-angle-autoroll

Documentation for the AutoRoller is here:
https://skia.googlesource.com/buildbot/+/master/autoroll/README.md

If the roll is causing failures, please contact the current sheriff, who should
be CC'd on the roll, and stop the roller if necessary.


TBR=geofflang@google.com

Change-Id: I14c202a990d59c5f4949e04dd5cfd68b92a2f743
Reviewed-on: https://chromium-review.googlesource.com/c/angle/angle/+/1647775Reviewed-by: angle-autoroll <angle-autoroll@skia-public.iam.gserviceaccount.com>
Commit-Queue: angle-autoroll <angle-autoroll@skia-public.iam.gserviceaccount.com>

We already handle 32-bit indices, so this change enables the corresponding extension for ES 2.0.

Bug: angleproject:2902
Change-Id: Iccde1d4aac383a9c11edf851778ff315de8d4ad1
Reviewed-on: https://chromium-review.googlesource.com/c/angle/angle/+/1646032Reviewed-by: Courtney Goeltzenleuchter <courtneygo@google.com>
Reviewed-by: Jamie Madill <jmadill@chromium.org>
Commit-Queue: James Dong <dongja@google.com>

Renames "ContextVk *context" to "ContextVk *contextVk" for consistency.
Also adds an "allocateDescriptorSet" helper function.

Bug: angleproject:3117
Change-Id: Id03e30432d8e5e35b682350a8e98fd2e62cdf89a
Reviewed-on: https://chromium-review.googlesource.com/c/angle/angle/+/1644776
Commit-Queue: Jamie Madill <jmadill@chromium.org>
Reviewed-by: Courtney Goeltzenleuchter <courtneygo@google.com>
Reviewed-by: Shahbaz Youssefi <syoussefi@chromium.org>

The major and minor versions in EGLPlatformParameters are for the backend
version (eg D3D 10 vs 10.1 vs 11.0), not the GLES version exposed.

BUG=angleproject:3499

Change-Id: I4bf89769b4eab397cdc2e3c51ed94c1e57c4d54b
Reviewed-on: https://chromium-review.googlesource.com/c/angle/angle/+/1643421
Commit-Queue: Geoff Lang <geofflang@chromium.org>
Reviewed-by: Shahbaz Youssefi <syoussefi@chromium.org>

Bug: angleproject:3205
Change-Id: Id3941b6953e03e7b2183acc57b2c6db4a6439352
Reviewed-on: https://chromium-review.googlesource.com/c/angle/angle/+/1643424
Commit-Queue: Shahbaz Youssefi <syoussefi@chromium.org>
Reviewed-by: Tobin Ehlis <tobine@google.com>
Reviewed-by: Jamie Madill <jmadill@chromium.org>

Bug: angleproject:3205
Change-Id: I6dc29b48155cd3c0ef98248076cf02e70c9310d9
Reviewed-on: https://chromium-review.googlesource.com/c/angle/angle/+/1643423Reviewed-by: Yuly Novikov <ynovikov@chromium.org>
Reviewed-by: Jonah Ryan-Davis <jonahr@google.com>
Commit-Queue: Shahbaz Youssefi <syoussefi@chromium.org>

https://chromium.googlesource.com/external/github.com/KhronosGroup/glslang/+log/a549bb817523..2f4a8dfd3a59


Created with:
  gclient setdep -r ./third_party/glslang/src@2f4a8dfd3a59

The AutoRoll server is located here: https://autoroll.skia.org/r/glslang-angle-autoroll

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If the roll is causing failures, please contact the current sheriff, who should
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TBR=geofflang@google.com

Change-Id: Ifa1490b9cf68e30bb4d103d8865fd5ec05c6f825
Reviewed-on: https://chromium-review.googlesource.com/c/angle/angle/+/1644757Reviewed-by: angle-autoroll <angle-autoroll@skia-public.iam.gserviceaccount.com>
Commit-Queue: angle-autoroll <angle-autoroll@skia-public.iam.gserviceaccount.com>

This fixes a crash when run with asserts on ARM GPU:

[2089630:1566159375:0531/202059.262200:ERROR:angle_platform_impl.cc(47)] GetVendorString(133):  ! Assert failed in GetVendorString (../../third_party/angle/src/libANGLE/renderer/driver_utils.cpp:133): vendorId == 0xba5eba11

Bug: angleproject:3492

Change-Id: I786edc459b1567a3eee0034a0d8ae7050ac31952
Reviewed-on: https://chromium-review.googlesource.com/c/angle/angle/+/1642331
Commit-Queue: Jamie Madill <jmadill@chromium.org>
Reviewed-by: Geoff Lang <geofflang@chromium.org>

The intent of this CL is to call convertVertexBuffer*PU only when we
have new data to convert. If the app unbinds and rebinds a vertex
buffer without changing the data we can now retrieve the cached
vertex buffer info from the BufferVk class. Previously we would always
reconvert the data on a rebind. This was slowing down applications and
benchmarks.

To achieve this we add a conversion cache to BufferVk. Each cache entry
stores a key based on the vertex info. Also we store a ring buffer for
each cache entry and a flag to indicate if the entry is dirty. The
cache is dirtied on a bufffer data update or a map call.

Improves performance in the T-Rex benchmark.

Bug: angleproject:3495
Change-Id: Ia999c9187510748ba95bc98362eb332e1990d270
Reviewed-on: https://chromium-review.googlesource.com/c/angle/angle/+/1638903
Commit-Queue: Jamie Madill <jmadill@chromium.org>
Reviewed-by: Courtney Goeltzenleuchter <courtneygo@google.com>

For consistency, call these ANGLE "features", a subset of which may be
workarounds. Also, whether the feature is enabled/disabled should be
publically visible as "status".

Bug: angleproject:1621
Change-Id: I0de90a932fbfe1fc9b59138153d616d29fa7268b
Reviewed-on: https://chromium-review.googlesource.com/c/angle/angle/+/1643410Reviewed-by: Jamie Madill <jmadill@chromium.org>
Reviewed-by: Geoff Lang <geofflang@chromium.org>
Commit-Queue: Jonah Ryan-Davis <jonahr@google.com>

The currently bound framebuffer affects some dirty bits.  This means
that processing those dirty bits temporarily use data from a framebuffer
that's about to be changed.  At best, that creates unnecessary dirty
bits in the Vulkan pipeline description.

Bug: angleproject:3204
Change-Id: Ie001d6c8fcc61af2e78cf2cb58a1691d8b735ff3
Reviewed-on: https://chromium-review.googlesource.com/c/angle/angle/+/1639750
Commit-Queue: Shahbaz Youssefi <syoussefi@chromium.org>
Reviewed-by: Jamie Madill <jmadill@chromium.org>

In preparation for adding blit functionality.

Bug: angleproject:3200
Change-Id: I77b6b6cbe90b26ee23c25edebaa2b130f3c2987a
Reviewed-on: https://chromium-review.googlesource.com/c/angle/angle/+/1641626
Commit-Queue: Shahbaz Youssefi <syoussefi@chromium.org>
Reviewed-by: Tim Van Patten <timvp@google.com>
Reviewed-by: Jamie Madill <jmadill@chromium.org>

Add eglQueryDisplayAttribANGLE based on eglQueryDisplayAttribEXT to add
behavior for quering the count of all workarounds available. Used
externally to build a list of workarounds.

Bug: angleproject:1621

Change-Id: I793acedc76111fd018600169d58bf5d8cf4a63ee
Reviewed-on: https://chromium-review.googlesource.com/c/angle/angle/+/1637817
Commit-Queue: Jonah Ryan-Davis <jonahr@google.com>
Reviewed-by: Geoff Lang <geofflang@chromium.org>

We reuse code from Skia to walk the stack on Posix platforms. See:
https://github.com/google/skia/blob/master/tools/CrashHandler.cpp

On Windows we use a BSD-licensed tool called StackWalker. See:
https://github.com/JochenKalmbach/StackWalker

This allows us to get high quality stack traces on Win/Linux/Mac.

Bug: angleproject:3162
Change-Id: I9c50ede2c6a41ed0ee85a0507372df42a487bcef
Reviewed-on: https://chromium-review.googlesource.com/c/angle/angle/+/1632950
Commit-Queue: Jamie Madill <jmadill@chromium.org>
Reviewed-by: Yuly Novikov <ynovikov@chromium.org>

This allows us to use the shader regardless of driver support for
texel buffer views. It also allows us to convert indices on the GPU
unconditionally.

We add a new internal compute shader that converts pairs of indices
into a packed single uint value that stores two 16-bit values. In the
future we could add support for converting primitive restart indices.

Should speed up benchmarks on systems which didn't have R8_UINT support
for compute shader buffers.

Bug: angleproject:3490
Change-Id: I56ca0cabb094e97f36ab4edc779e6c8ad2d2601e
Reviewed-on: https://chromium-review.googlesource.com/c/angle/angle/+/1639058
Commit-Queue: Jamie Madill <jmadill@chromium.org>
Reviewed-by: Tim Van Patten <timvp@google.com>

Do not use depth dimension when copying normal 2D textures of a 2d texture
array. It copies past the end of the buffer obtained via
ID3D11DeviceContext::Map().

Fixes a case which can be reproed with the payload disabled:

gn args out\debug --args="is_debug=true"
ninja -C out\debug angle_end2end_tests
out\debug\angle_end2end_tests ^
 --gtest_filter=Texture2DArrayCopy.SnormFormats* --gtest_catch_exceptions=0 ^
 --gtest_repeat=-1

Bug: angleproject:2865
Change-Id: Id9bc5489fa41749d1b1d2e87992166b1a0af76fc
Reviewed-on: https://chromium-review.googlesource.com/c/angle/angle/+/1641247Reviewed-by: Jamie Madill <jmadill@chromium.org>
Commit-Queue: Jamie Madill <jmadill@chromium.org>

The skip condition for GLSLTest_ES3.VaryingStructNotInitializedInVertexShader
is modified to not skip NVIDIA on windows.

Bug: angleproject:3413
Change-Id: I126d9fa9e36c3b6c07abfd24bdaf6feb76ac4f6f
Reviewed-on: https://chromium-review.googlesource.com/c/angle/angle/+/1640208
Commit-Queue: Jamie Madill <jmadill@chromium.org>
Reviewed-by: Jamie Madill <jmadill@chromium.org>

https://chromium.googlesource.com/external/github.com/KhronosGroup/glslang/+log/6d88284607d2..a549bb817523


Created with:
  gclient setdep -r ./third_party/glslang/src@a549bb817523

The AutoRoll server is located here: https://autoroll.skia.org/r/glslang-angle-autoroll

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If the roll is causing failures, please contact the current sheriff, who should
be CC'd on the roll, and stop the roller if necessary.


TBR=cwallez@google.com

Change-Id: I9eb385899560332a48da791ab2add2c737c44848
Reviewed-on: https://chromium-review.googlesource.com/c/angle/angle/+/1640254Reviewed-by: angle-autoroll <angle-autoroll@skia-public.iam.gserviceaccount.com>
Commit-Queue: angle-autoroll <angle-autoroll@skia-public.iam.gserviceaccount.com>

https://chromium.googlesource.com/external/github.com/KhronosGroup/SPIRV-Tools.git/+log/209ff0ce90ce..699e167d78ee


Created with:
  gclient setdep -r ./third_party/spirv-tools/src@699e167d78ee

The AutoRoll server is located here: https://autoroll.skia.org/r/spirv-tools-angle-autoroll

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TBR=cwallez@google.com

Change-Id: I078d9f2857080e7675808b583658ab974a468936
Reviewed-on: https://chromium-review.googlesource.com/c/angle/angle/+/1640253Reviewed-by: angle-autoroll <angle-autoroll@skia-public.iam.gserviceaccount.com>
Commit-Queue: angle-autoroll <angle-autoroll@skia-public.iam.gserviceaccount.com>

In previous logic, we didn't check the structure field member type. So
when passing the non-struct member of a structure to a function, it
would think that struct mapping was needed.
In this patch, we add more checking so that struct mapping only happens
when there are structure copy or passing a structure to a function.

BUG=angleproject:2967
Change-Id: Ic98e884c8f8540e180cdf40a0e036ffef18c1689
Reviewed-on: https://chromium-review.googlesource.com/c/angle/angle/+/1638227
Commit-Queue: Jiajia Qin <jiajia.qin@intel.com>
Reviewed-by: Jamie Madill <jmadill@chromium.org>

This is a prepratory refactor for converting index buffers on the GPU
using a more generic compute shader. No functional change.

Bug: angleproject:3490
Change-Id: Iadf4b1429314db6850320aee33c4113f38577378
Reviewed-on: https://chromium-review.googlesource.com/c/angle/angle/+/1639057Reviewed-by: Shahbaz Youssefi <syoussefi@chromium.org>
Reviewed-by: Tim Van Patten <timvp@google.com>
Commit-Queue: Jamie Madill <jmadill@chromium.org>

These were accidentally dropped in https://crrev.com/c/1574674 .
Re-enable so we can gather better perf stats on Windows machines.

Bug: angleproject:3494
Change-Id: I92e9ba7e7783fddde1a47c0ffe056da7750d2c3b
Reviewed-on: https://chromium-review.googlesource.com/c/angle/angle/+/1639063
Commit-Queue: Jamie Madill <jmadill@chromium.org>
Reviewed-by: Yuly Novikov <ynovikov@chromium.org>