dEQP: Update documentation.

doc/dEQP.md

 # ANGLE + dEQP
-drawElements (dEQP) is a very robust and comprehensive set of open-source tests for GLES2, GLES3+ and EGL. They provide a huge net of coverage for almost every GL API feature. ANGLE by default builds dEQP testing targets for testing with GLES 2 with D3D9/11 and OpenGL, and GLES 3 with D3D11.
+
+drawElements (dEQP) is a very robust and comprehensive set of open-source
+tests for GLES2, GLES3+ and EGL. They provide a huge net of coverage for
+almost every GL API feature. ANGLE by default builds dEQP testing targets for
+testing against GLES 2, GLES 3, EGL, and GLES 3.1 (on supported platforms).
 
 ## How to build dEQP
 
-You should have dEQP as a target if you followed the [DevSetup](DevSetup.md) instructions. Current targets:
+You should have dEQP as a target if you followed the [DevSetup](DevSetup.md)
+instructions. Current targets:
 
-  * GLES2 testing with `angle_deqp_gles2_tests` (supported on Linux/GL and Windows/D3D9/D3D11/GL)
-  * GLES3 testing with `angle_deqp_gles3_tests` (supported on Windows/D3D11)
-  * EGL testing with `angle_deqp_egl_tests` (supported on Windows)
+  * `angle_deqp_gles2_tests` for GLES 2.0 tests
+  * `angle_deqp_gles3_tests` for GLES 3.0 tests
+  * `angle_deqp_egl_tests` for EGL 1.x tests
+  * `angle_deqp_gles31_tests` for GLES 3.1 tests (currently very experimental)
 
 ## How to use dEQP
 
-The `--deqp-case` flag allows you to run individual tests, with wildcard support. For example: `--deqp-case=dEQP-GLES2.functional.shaders.linkage.*`.
+The `--deqp-case` flag allows you to run individual tests, with simple
+wildcard support. For example: `--deqp-case=dEQP-
+GLES2.functional.shaders.linkage.*`.
 
-Full tests lists are archived in `src/tests/deqp_support`. You can also dump a list of test case names: append the command line argument `--deqp-runmode=txt-caselist`, run the test target, then look for the file named `third_party/deqp/src/data/dEQP-<target>-cases.txt`.
+The tests lists are sourced from the Android CTS masters in
+`third_party/deqp/src/android/cts/master`. See `gles2-master.txt`,
+`gles3-master.txt`, `gles31-master.txt` and `egl-master.txt`.
 
-If you're running the full test suite, Debug can take a very long time. Running in Debug is more useful to isolate and fix particular failures.
+If you're running a full test suite, it might take very long time. Running in
+Debug is only useful to isolate and fix particular failures, Release will give
+a better sense of total passing rate.
 
 ### Choosing a Renderer on Windows
 
-By default Windows ANGLE tests with D3D11. To specify the exact platform for ANGLE + dEQP, use the arguments:
+By default Windows ANGLE tests with D3D11. To specify the exact platform for
+ANGLE + dEQP, use the arguments:
 
-  * `--deqp-egl-display-type=angle-d3d11` for D3D11 (high feature level)
+  * `--deqp-egl-display-type=angle-d3d11` for D3D11 (highest available feature level)
   * `--deqp-egl-display-type=angle-d3d9` for D3D9
   * `--deqp-egl-display-type=angle-d3d11-fl93` for D3D11 Feature level 9_3
-  * `--deqp-egl-display-type=angle-gl` for OpenGL
+  * `--deqp-egl-display-type=angle-gl` for OpenGL Desktop (OSX, Linux and Windows)
+  * `--deqp-egl-display-type=angle-gles` for OpenGL ES (Android/ChromeOS, some Windows platforms)
 
 ### Check your results
 
-dEQP generates a test log to `src/tests/TestResults.qpa`. To view the test log information, you'll need to use the open-source GUI [Cherry](https://android.googlesource.com/platform/external/cherry). ANGLE checks out a copy of Cherry to `angle/third_party/cherry` when you sync with gclient.
+If run from Visual Studio 2015, dEQP generates a test log to
+`src/tests/TestResults.qpa`. To view the test log information, you'll need to
+use the open-source GUI
+[Cherry](https://android.googlesource.com/platform/external/cherry). ANGLE
+checks out a copy of Cherry to `angle/third_party/cherry` when you sync with
+gclient. Note, if you are using ninja or another build system, the qpa file
+will be located in your working directory.
 
-See the [official Cherry README](https://android.googlesource.com/platform/external/cherry/+/master/README) for instructions on how to run Cherry on Linux or Windows.
+See the [official Cherry README](https://android.googlesource.com/platform/ext
+ernal/cherry/+/master/README) for instructions on how to run Cherry on Linux
+or Windows.
 
 ### GoogleTest, ANGLE and dEQP
 
-ANGLE also supports the same set of targets built with GoogleTest, for running on the bots. We don't currently recommend using these for local debugging, but we do maintain lists of test expectations in `src/tests/deqp_support`. When you fix tests, please remove the suppression(s) from the relevant files!
+ANGLE also supports the same set of targets built with GoogleTest, for running
+on the bots. We don't currently recommend using these for local debugging, but
+we do maintain lists of test expectations in `src/tests/deqp_support`. When
+you fix tests, please remove the suppression(s) from the relevant files!