Refactor GL bindings so there is no global GLApi or DriverGL.

Refactor GL bindings so there is no global GLApi or DriverGL.

Having a single global API and Driver object doesn't mirror the real GL
context state that may have different entry points, extensions and version
numbers per context.  This can cause entry points to be called when they
are not loaded or extensions used when they are not present.

 * Refactored the GLApi and DriverGL objects to be owned by GLContext
   objects.
 * Moved all driver-level GL workarounds into RealGLApi so no swapping of
   function pointers in DriverGL is needed.
 * Instead of having separate debug function pointers in the drivers that
   call back to global variables, add new DebugApi objects that wrap the
   RealApi objects.

BUG=671217
CQ_INCLUDE_TRYBOTS=master.tryserver.chromium.linux:linux_optional_gpu_tests_rel;master.tryserver.chromium.mac:mac_optional_gpu_tests_rel;master.tryserver.chromium.win:win_optional_gpu_tests_rel

[Geoff Lang, 2016-12-15 15:37:31]

Description was changed from

==========
Refactor GL bindings so there is no global GLApi or DriverGL.

Having a single global API and Driver object doesn't mirror the real GL
context state that may have different entry points, extensions and version
numbers per context.  This can cause entry points to be called when they
are not loaded or extensions used when they are not present.

 * Refactored the GLApi and DriverGL objects to be owned by GLContext
   objects.
 * Moved all driver-level GL workarounds into RealGLApi so no swapping of
   function pointers in DriverGL is needed.
 * Instead of having separate debug function pointers in the drivers that
   call back to global variables, add new DebugApi objects that wrap the
   RealApi objects.

BUG=671217
==========

to

==========
Refactor GL bindings so there is no global GLApi or DriverGL.

Having a single global API and Driver object doesn't mirror the real GL
context state that may have different entry points, extensions and version
numbers per context.  This can cause entry points to be called when they
are not loaded or extensions used when they are not present.

 * Refactored the GLApi and DriverGL objects to be owned by GLContext
   objects.
 * Moved all driver-level GL workarounds into RealGLApi so no swapping of
   function pointers in DriverGL is needed.
 * Instead of having separate debug function pointers in the drivers that
   call back to global variables, add new DebugApi objects that wrap the
   RealApi objects.

BUG=671217
CQ_INCLUDE_TRYBOTS=master.tryserver.chromium.linux:linux_optional_gpu_tests_rel;master.tryserver.chromium.mac:mac_optional_gpu_tests_rel;master.tryserver.chromium.win:win_optional_gpu_tests_rel
==========

[Geoff Lang, 2016-12-15 16:02:42]

The CQ bit was checked by geofflang@chromium.org to run a CQ dry run

[commit-bot: I haz the power, 2016-12-15 16:02:57]

Dry run: CQ is trying da patch. Follow status at
 
https://chromium-cq-status.appspot.com/v2/patch-status/codereview.chromium.or...

[commit-bot: I haz the power, 2016-12-15 16:15:02]

The CQ bit was unchecked by commit-bot@chromium.org

[commit-bot: I haz the power, 2016-12-15 16:15:03]

Dry run: Try jobs failed on following builders:
  cast_shell_linux on master.tryserver.chromium.linux (JOB_FAILED,
http://build.chromium.org/p/tryserver.chromium.linux/builders/cast_shell_linu...)

[Geoff Lang, 2016-12-15 21:19:21]

The CQ bit was checked by geofflang@chromium.org to run a CQ dry run

[commit-bot: I haz the power, 2016-12-15 21:20:44]

Dry run: CQ is trying da patch. Follow status at
 
https://chromium-cq-status.appspot.com/v2/patch-status/codereview.chromium.or...

[commit-bot: I haz the power, 2016-12-15 21:33:50]

The CQ bit was unchecked by commit-bot@chromium.org

[commit-bot: I haz the power, 2016-12-15 21:33:51]

Dry run: Try jobs failed on following builders:
  mac_chromium_rel_ng on master.tryserver.chromium.mac (JOB_FAILED,
http://build.chromium.org/p/tryserver.chromium.mac/builders/mac_chromium_rel_...)

[Geoff Lang, 2016-12-15 23:07:20]

The CQ bit was checked by geofflang@chromium.org to run a CQ dry run

[commit-bot: I haz the power, 2016-12-15 23:09:32]

Dry run: CQ is trying da patch. Follow status at
 
https://chromium-cq-status.appspot.com/v2/patch-status/codereview.chromium.or...

[commit-bot: I haz the power, 2016-12-15 23:25:58]

The CQ bit was unchecked by commit-bot@chromium.org

[commit-bot: I haz the power, 2016-12-15 23:25:59]

Dry run: Try jobs failed on following builders:
  mac_chromium_compile_dbg_ng on master.tryserver.chromium.mac (JOB_FAILED,
http://build.chromium.org/p/tryserver.chromium.mac/builders/mac_chromium_comp...)
  mac_optional_gpu_tests_rel on master.tryserver.chromium.mac (JOB_FAILED,
http://build.chromium.org/p/tryserver.chromium.mac/builders/mac_optional_gpu_...)

[Geoff Lang, 2016-12-16 19:00:47]

The CQ bit was checked by geofflang@chromium.org to run a CQ dry run

[commit-bot: I haz the power, 2016-12-16 19:01:16]

Dry run: CQ is trying da patch. Follow status at
 
https://chromium-cq-status.appspot.com/v2/patch-status/codereview.chromium.or...

[commit-bot: I haz the power, 2016-12-16 19:28:31]

The CQ bit was unchecked by commit-bot@chromium.org

[commit-bot: I haz the power, 2016-12-16 19:28:32]

Dry run: Try jobs failed on following builders:
  android_compile_dbg on master.tryserver.chromium.android (JOB_FAILED,
https://build.chromium.org/p/tryserver.chromium.android/builders/android_comp...)

[Geoff Lang, 2016-12-16 20:59:25]

The CQ bit was checked by geofflang@chromium.org to run a CQ dry run

[commit-bot: I haz the power, 2016-12-16 21:01:11]

Dry run: CQ is trying da patch. Follow status at
 
https://chromium-cq-status.appspot.com/v2/patch-status/codereview.chromium.or...

[commit-bot: I haz the power, 2016-12-16 21:28:46]

The CQ bit was unchecked by commit-bot@chromium.org

[commit-bot: I haz the power, 2016-12-16 21:28:47]

Dry run: Try jobs failed on following builders:
  android_compile_dbg on master.tryserver.chromium.android (JOB_FAILED,
https://build.chromium.org/p/tryserver.chromium.android/builders/android_comp...)
  chromeos_amd64-generic_chromium_compile_only_ng on
master.tryserver.chromium.linux (JOB_FAILED,
http://build.chromium.org/p/tryserver.chromium.linux/builders/chromeos_amd64-...)
  linux_optional_gpu_tests_rel on master.tryserver.chromium.linux (JOB_FAILED,
http://build.chromium.org/p/tryserver.chromium.linux/builders/linux_optional_...)

[Geoff Lang, 2016-12-19 21:58:15]

The CQ bit was checked by geofflang@chromium.org to run a CQ dry run

[commit-bot: I haz the power, 2016-12-19 21:58:51]

Dry run: CQ is trying da patch. Follow status at
 
https://chromium-cq-status.appspot.com/v2/patch-status/codereview.chromium.or...

[commit-bot: I haz the power, 2016-12-19 22:34:24]

The CQ bit was unchecked by commit-bot@chromium.org

[commit-bot: I haz the power, 2016-12-19 22:34:25]

Dry run: Try jobs failed on following builders:
  linux_chromium_rel_ng on master.tryserver.chromium.linux (JOB_FAILED,
http://build.chromium.org/p/tryserver.chromium.linux/builders/linux_chromium_...)
  mac_chromium_compile_dbg_ng on master.tryserver.chromium.mac (JOB_FAILED,
http://build.chromium.org/p/tryserver.chromium.mac/builders/mac_chromium_comp...)

[Geoff Lang, 2016-12-20 21:43:29]

The CQ bit was checked by geofflang@chromium.org to run a CQ dry run

[commit-bot: I haz the power, 2016-12-20 21:44:26]

Dry run: CQ is trying da patch. Follow status at
 
https://chromium-cq-status.appspot.com/v2/patch-status/codereview.chromium.or...

[commit-bot: I haz the power, 2016-12-20 22:03:10]

The CQ bit was unchecked by commit-bot@chromium.org

[commit-bot: I haz the power, 2016-12-20 22:03:11]

Dry run: Try jobs failed on following builders:
  mac_optional_gpu_tests_rel on master.tryserver.chromium.mac (JOB_FAILED,
http://build.chromium.org/p/tryserver.chromium.mac/builders/mac_optional_gpu_...)

[Geoff Lang, 2016-12-21 21:00:13]

The CQ bit was checked by geofflang@chromium.org to run a CQ dry run

[commit-bot: I haz the power, 2016-12-21 21:00:51]

Dry run: CQ is trying da patch. Follow status at
 
https://chromium-cq-status.appspot.com/v2/patch-status/codereview.chromium.or...

[commit-bot: I haz the power, 2016-12-21 21:16:32]

The CQ bit was unchecked by commit-bot@chromium.org

[commit-bot: I haz the power, 2016-12-21 21:16:33]

Dry run: Try jobs failed on following builders:
  mac_chromium_compile_dbg_ng on master.tryserver.chromium.mac (JOB_FAILED,
http://build.chromium.org/p/tryserver.chromium.mac/builders/mac_chromium_comp...)

[Geoff Lang, 2016-12-21 22:28:38]

The CQ bit was checked by geofflang@chromium.org to run a CQ dry run

[commit-bot: I haz the power, 2016-12-21 22:29:23]

Dry run: CQ is trying da patch. Follow status at
 
https://chromium-cq-status.appspot.com/v2/patch-status/codereview.chromium.or...

[commit-bot: I haz the power, 2016-12-21 22:48:41]

The CQ bit was unchecked by commit-bot@chromium.org

[commit-bot: I haz the power, 2016-12-21 22:48:43]

Dry run: Try jobs failed on following builders:
  mac_chromium_compile_dbg_ng on master.tryserver.chromium.mac (JOB_FAILED,
http://build.chromium.org/p/tryserver.chromium.mac/builders/mac_chromium_comp...)

[Geoff Lang, 2016-12-22 16:51:46]

The CQ bit was checked by geofflang@chromium.org to run a CQ dry run

[commit-bot: I haz the power, 2016-12-22 16:52:02]

Dry run: CQ is trying da patch. Follow status at
 
https://chromium-cq-status.appspot.com/v2/patch-status/codereview.chromium.or...

[commit-bot: I haz the power, 2016-12-22 17:08:46]

The CQ bit was unchecked by commit-bot@chromium.org

[commit-bot: I haz the power, 2016-12-22 17:08:48]

Dry run: Try jobs failed on following builders:
  linux_chromium_chromeos_rel_ng on master.tryserver.chromium.linux (JOB_FAILED,
http://build.chromium.org/p/tryserver.chromium.linux/builders/linux_chromium_...)

[Geoff Lang, 2016-12-22 18:18:59]

The CQ bit was checked by geofflang@chromium.org to run a CQ dry run

[commit-bot: I haz the power, 2016-12-22 18:19:18]

Dry run: CQ is trying da patch. Follow status at
 
https://chromium-cq-status.appspot.com/v2/patch-status/codereview.chromium.or...

[Geoff Lang, 2016-12-22 18:47:59]

The CQ bit was checked by geofflang@chromium.org to run a CQ dry run

[commit-bot: I haz the power, 2016-12-22 18:48:21]

Dry run: CQ is trying da patch. Follow status at
 
https://chromium-cq-status.appspot.com/v2/patch-status/codereview.chromium.or...

[commit-bot: I haz the power, 2016-12-22 19:14:02]

The CQ bit was unchecked by commit-bot@chromium.org

[commit-bot: I haz the power, 2016-12-22 19:14:03]

Dry run: Try jobs failed on following builders:
  mac_optional_gpu_tests_rel on master.tryserver.chromium.mac (JOB_FAILED,
http://build.chromium.org/p/tryserver.chromium.mac/builders/mac_optional_gpu_...)

[Geoff Lang, 2016-12-22 20:11:14]

The CQ bit was checked by geofflang@chromium.org to run a CQ dry run

[commit-bot: I haz the power, 2016-12-22 20:11:53]

Dry run: CQ is trying da patch. Follow status at
 
https://chromium-cq-status.appspot.com/v2/patch-status/codereview.chromium.or...

[commit-bot: I haz the power, 2016-12-22 21:44:13]

The CQ bit was unchecked by commit-bot@chromium.org

[commit-bot: I haz the power, 2016-12-22 21:44:14]

Dry run: Try jobs failed on following builders:
  linux_chromium_rel_ng on master.tryserver.chromium.linux (JOB_FAILED,
http://build.chromium.org/p/tryserver.chromium.linux/builders/linux_chromium_...)

[Geoff Lang, 2017-01-10 21:43:18]

The CQ bit was checked by geofflang@chromium.org to run a CQ dry run

[commit-bot: I haz the power, 2017-01-10 21:43:58]

Dry run: CQ is trying da patch. Follow status at
 
https://chromium-cq-status.appspot.com/v2/patch-status/codereview.chromium.or...

[commit-bot: I haz the power, 2017-01-10 22:33:25]

The CQ bit was unchecked by commit-bot@chromium.org

[commit-bot: I haz the power, 2017-01-10 22:33:26]

Dry run: Try jobs failed on following builders:
  mac_chromium_rel_ng on master.tryserver.chromium.mac (JOB_FAILED,
http://build.chromium.org/p/tryserver.chromium.mac/builders/mac_chromium_rel_...)

[Geoff Lang, 2017-01-11 16:13:46]

The CQ bit was checked by geofflang@chromium.org to run a CQ dry run

[commit-bot: I haz the power, 2017-01-11 16:14:07]

Dry run: CQ is trying da patch. Follow status at
 
https://chromium-cq-status.appspot.com/v2/patch-status/codereview.chromium.or...

[commit-bot: I haz the power, 2017-01-11 17:14:53]

The CQ bit was unchecked by commit-bot@chromium.org

[commit-bot: I haz the power, 2017-01-11 17:14:55]

Dry run: Try jobs failed on following builders:
  mac_chromium_rel_ng on master.tryserver.chromium.mac (JOB_FAILED,
http://build.chromium.org/p/tryserver.chromium.mac/builders/mac_chromium_rel_...)

[Geoff Lang, 2017-01-11 17:53:21]

The CQ bit was checked by geofflang@chromium.org to run a CQ dry run

[commit-bot: I haz the power, 2017-01-11 17:53:45]

Dry run: CQ is trying da patch. Follow status at
 
https://chromium-cq-status.appspot.com/v2/patch-status/codereview.chromium.or...

[commit-bot: I haz the power, 2017-01-11 19:49:36]

The CQ bit was unchecked by commit-bot@chromium.org

[commit-bot: I haz the power, 2017-01-11 19:49:37]

Dry run: Try jobs failed on following builders:
  mac_chromium_rel_ng on master.tryserver.chromium.mac (JOB_FAILED,
http://build.chromium.org/p/tryserver.chromium.mac/builders/mac_chromium_rel_...)

[Geoff Lang, 2017-01-11 20:53:04]

The CQ bit was checked by geofflang@chromium.org to run a CQ dry run

[commit-bot: I haz the power, 2017-01-11 20:53:37]

Dry run: CQ is trying da patch. Follow status at
 
https://chromium-cq-status.appspot.com/v2/patch-status/codereview.chromium.or...

[commit-bot: I haz the power, 2017-01-11 21:12:28]

The CQ bit was unchecked by commit-bot@chromium.org

[commit-bot: I haz the power, 2017-01-11 21:12:30]

Dry run: Try jobs failed on following builders:
  mac_chromium_rel_ng on master.tryserver.chromium.mac (JOB_FAILED,
http://build.chromium.org/p/tryserver.chromium.mac/builders/mac_chromium_rel_...)

[Geoff Lang, 2017-01-11 22:02:22]

The CQ bit was checked by geofflang@chromium.org to run a CQ dry run

[commit-bot: I haz the power, 2017-01-11 22:04:06]

Dry run: CQ is trying da patch. Follow status at
 
https://chromium-cq-status.appspot.com/v2/patch-status/codereview.chromium.or...

[commit-bot: I haz the power, 2017-01-11 22:20:03]

The CQ bit was unchecked by commit-bot@chromium.org

[commit-bot: I haz the power, 2017-01-11 22:20:04]

Dry run: Try jobs failed on following builders:
  mac_chromium_compile_dbg_ng on master.tryserver.chromium.mac (JOB_FAILED,
http://build.chromium.org/p/tryserver.chromium.mac/builders/mac_chromium_comp...)

[Geoff Lang, 2017-01-12 14:48:23]

The CQ bit was checked by geofflang@chromium.org to run a CQ dry run

[commit-bot: I haz the power, 2017-01-12 14:48:44]

Dry run: CQ is trying da patch. Follow status at
 
https://chromium-cq-status.appspot.com/v2/patch-status/codereview.chromium.or...

[commit-bot: I haz the power, 2017-01-12 15:54:46]

The CQ bit was unchecked by commit-bot@chromium.org

[commit-bot: I haz the power, 2017-01-12 15:54:48]

Dry run: Try jobs failed on following builders:
  mac_chromium_rel_ng on master.tryserver.chromium.mac (JOB_FAILED,
http://build.chromium.org/p/tryserver.chromium.mac/builders/mac_chromium_rel_...)

[Geoff Lang, 2017-01-12 19:25:33]

The CQ bit was checked by geofflang@chromium.org to run a CQ dry run

[commit-bot: I haz the power, 2017-01-12 19:26:11]

Dry run: CQ is trying da patch. Follow status at
 
https://chromium-cq-status.appspot.com/v2/patch-status/codereview.chromium.or...

[commit-bot: I haz the power, 2017-01-12 20:38:57]

The CQ bit was unchecked by commit-bot@chromium.org

[commit-bot: I haz the power, 2017-01-12 20:38:58]

Dry run: This issue passed the CQ dry run.