This reverts commit 47b3db22.

Reason for revert:
Broke the ANGLE roll into Chromium:
https://chromium-review.googlesource.com/c/chromium/src/+/2531069

[1875/27343] SOLINK ./libGLESv2.so
FAILED: libGLESv2.so libGLESv2.so.TOC 
/b/s/w/ir/cipd_bin_packages/cpython/bin/python "../../build/toolchain/gcc_solink_wrapper.py" --readelf="readelf" --nm="nm"  --sofile="./libGLESv2.so" --tocfile="./libGLESv2.so.TOC" --output="./libGLESv2.so" -- ../../third_party/llvm-build/Release+Asserts/bin/clang++ -shared -Wl,-soname="libGLESv2.so" -Wl,--fatal-warnings -Wl,--build-id -fPIC -Wl,-z,noexecstack -Wl,-z,relro -Wl,-z,defs -Wl,--as-needed -fuse-ld=lld -Wl,--color-diagnostics -Wl,--no-call-graph-profile-sort -m64 -Werror -nostdlib++ --sysroot=../../build/linux/debian_sid_amd64-sysroot -L../../build/linux/debian_sid_amd64-sysroot/usr/local/lib/x86_64-linux-gnu -L../../build/linux/debian_sid_amd64-sysroot/lib/x86_64-linux-gnu -L../../build/linux/debian_sid_amd64-sysroot/usr/lib/x86_64-linux-gnu -Wl,-rpath=\$ORIGIN -Wl,--export-dynamic -Wl,-rpath=\$ORIGIN -o "./libGLESv2.so" @"./libGLESv2.so.rsp"
ld.lld: error: undefined symbol: sh::TranslatorVulkan::GetDriverUniformFlipXYRef(sh::TVariable const*)
>>> referenced by RewriteDfdy.cpp:134 (../../third_party/angle/src/compiler/translator/tree_ops/RewriteDfdy.cpp:134)
>>>               translator/RewriteDfdy.o:(sh::(anonymous namespace)::Traverser::visitUnaryWithRotation(sh::Visit, sh::TIntermUnary*)) in archive obj/third_party/angle/libtranslator.a
>>> referenced by RewriteDfdy.cpp:200 (../../third_party/angle/src/compiler/translator/tree_ops/RewriteDfdy.cpp:200)
>>>               translator/RewriteDfdy.o:(sh::(anonymous namespace)::Traverser::visitUnaryWithoutRotation(sh::Visit, sh::TIntermUnary*)) in archive obj/third_party/angle/libtranslator.a

ld.lld: error: undefined symbol: sh::TranslatorVulkan::GetDriverUniformFragRotationMatrixRef(sh::TVariable const*)
>>> referenced by RewriteDfdy.cpp:136 (../../third_party/angle/src/compiler/translator/tree_ops/RewriteDfdy.cpp:136)
>>>               translator/RewriteDfdy.o:(sh::(anonymous namespace)::Traverser::visitUnaryWithRotation(sh::Visit, sh::TIntermUnary*)) in archive obj/third_party/angle/libtranslator.a
clang: error: linker command failed with exit code 1 (use -v to see invocation)


Original change's description:
> Vulkan: Let shader use rotation specialized constant
>
> If use rotation specialized constant is enabled via compiler options,
> this CL will use rotation specialized constant to generate flipXY,
> rotation matrix and negFlipXY. This allows the driver to optimize for
> the minimum instructions for rotation.
>
> Bug: b/171750979
> Change-Id: I9851ac999d4d35b9f230f796e5445bca0dcb1e77
> Reviewed-on: https://chromium-review.googlesource.com/c/angle/angle/+/2514773
> Commit-Queue: Charlie Lao <cclao@google.com>
> Reviewed-by: Shahbaz Youssefi <syoussefi@chromium.org>
> Reviewed-by: Ian Elliott <ianelliott@google.com>
> Reviewed-by: Jamie Madill <jmadill@chromium.org>
> Reviewed-by: Tim Van Patten <timvp@google.com>

TBR=ianelliott@google.com,timvp@google.com,syoussefi@chromium.org,jmadill@chromium.org,cclao@google.com

Change-Id: Id3976259d1f4049aa62b679ad5b25c2ac337c92b
No-Presubmit: true
No-Tree-Checks: true
No-Try: true
Bug: b/171750979
Reviewed-on: https://chromium-review.googlesource.com/c/angle/angle/+/2532702Reviewed-by: Tim Van Patten <timvp@google.com>
Commit-Queue: Tim Van Patten <timvp@google.com>