Revert of gpu: Add CHROMIUM_sync_query extension.

Revert of gpu: Add CHROMIUM_sync_query extension. (https://codereview.chromium.org/238933003/)

Reason for revert:
[gardening]

Seems that QueryTest.SyncQueryBasic started to fail on Android Tests (dbug).

http://build.chromium.org/p/chromium.webkit/builders/Android%20Tests%20%28dbg%29
http://build.chromium.org/p/chromium.webkit/builders/Android%20Tests%20%28dbg%29/builds/18673/steps/gl_tests/logs/stdio

[==========] Running 1 test from 1 test case.
[----------] Global test environment set-up.
[----------] 1 test from QueryTest
[ RUN      ] QueryTest.SyncQueryBasic
../../gpu/command_buffer/tests/gl_query_unittest.cc:154: Failure
Value of: GLTestHelper::HasExtension("GL_CHROMIUM_sync_query")
  Actual: false
Expected: true
[0417/014324:ERROR:gles2_cmd_decoder.cc(9542)] [GroupMarkerNotSet(crbug.com/242999)!:04B0A600]GL ERROR :GL_INVALID_OPERATION : glBeginQueryEXT: not enabled for commands completed queries
[0417/014324:ERROR:gles2_cmd_decoder.cc(9617)] [GroupMarkerNotSet(crbug.com/242999)!:04B0A600]GL ERROR :GL_INVALID_OPERATION : glEndQueryEXT: No active query
../../gpu/command_buffer/tests/gl_query_unittest.cc:166: Failure
Value of: available
  Actual: false
Expected: true
../../gpu/command_buffer/tests/gl_manager.cc:241: Failure
Value of: glGetError() == GL_NONE
  Actual: false
Expected: true
[  FAILED  ] QueryTest.SyncQueryBasic (70 ms)
[----------] 1 test from QueryTest (71 ms total)

[----------] Global test environment tear-down
[==========] 1 test from 1 test case ran. (71 ms total)
[  PASSED  ] 0 tests.
[  FAILED  ] 1 test, listed below:
[  FAILED  ] QueryTest.SyncQueryBasic



In range 264168:264191, this patch might be the culprit.

Let me revert this patch and watch whether Android Tests will cycle to green or not.


Original issue's description:
> gpu: Add CHROMIUM_sync_query extension.
> 
> This adds a GL_COMMANDS_COMPLETED_CHROMIUM query target that provide
> a finer granularity of synchronizing GL command completion than offered
> by glFinish().
> 
> BUG=269808, 356871, 273274
> TEST=gpu_unittests --gtest_filter=GLES2DecoderManualInitTest.BeginEndQueryEXTCommandsCompletedCHROMIUM
> 
> Committed: https://src.chromium.org/viewvc/chrome?view=rev&revision=264173

TBR=piman@chromium.org,epenner@chromium.org,sievers@chromium.org,reveman@chromium.org
NOTREECHECKS=true
NOTRY=true
BUG=269808, 356871, 273274
Committed: https://src.chromium.org/viewvc/chrome?view=rev&revision=264407

[hayato, 2014-04-17 03:52:58]

Created Revert of gpu: Add CHROMIUM_sync_query extension.

[commit-bot: I haz the power, 2014-04-17 03:53:42]

CQ is trying da patch. Follow status at
https://chromium-status.appspot.com/cq/hayato@chromium.org/240273006/1

[commit-bot: I haz the power, 2014-04-17 04:22:36]

Change committed as 264407