Created a patch for this: https://codereview.chromium.org/2826043002/.

The following revision refers to this bug:
  https://chromium.googlesource.com/chromium/src.git/+/2dfc7029286f40d73b131760e3b7467c68b8bb17

commit 2dfc7029286f40d73b131760e3b7467c68b8bb17
Author: c.padhi <c.padhi@samsung.com>
Date: Thu May 18 18:40:36 2017

Do not share FBOs/VAOs/Transform feedback objects across contexts

Framebuffer, vertex array and transform feedback objects are not shared
across opengl contexts. Therefore, instead of using ShareGroup's IdHandler,
we can manage IDs for these objects locally in GLES2Implementation itself.

BUG= 722717 
CQ_INCLUDE_TRYBOTS=master.tryserver.chromium.android:android_optional_gpu_tests_rel;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

Review-Url: https://codereview.chromium.org/2826043002
Cr-Commit-Position: refs/heads/master@{#472883}

[modify] https://crrev.com/2dfc7029286f40d73b131760e3b7467c68b8bb17/gpu/command_buffer/build_gles2_cmd_buffer.py
[modify] https://crrev.com/2dfc7029286f40d73b131760e3b7467c68b8bb17/gpu/command_buffer/client/gles2_implementation.cc
[modify] https://crrev.com/2dfc7029286f40d73b131760e3b7467c68b8bb17/gpu/command_buffer/client/gles2_implementation.h
[modify] https://crrev.com/2dfc7029286f40d73b131760e3b7467c68b8bb17/gpu/command_buffer/client/gles2_implementation_impl_autogen.h
[modify] https://crrev.com/2dfc7029286f40d73b131760e3b7467c68b8bb17/gpu/command_buffer/client/gles2_implementation_unittest.cc
[modify] https://crrev.com/2dfc7029286f40d73b131760e3b7467c68b8bb17/gpu/command_buffer/client/share_group.cc
[modify] https://crrev.com/2dfc7029286f40d73b131760e3b7467c68b8bb17/gpu/command_buffer/client/share_group.h
[modify] https://crrev.com/2dfc7029286f40d73b131760e3b7467c68b8bb17/gpu/command_buffer/common/gles2_cmd_format.h
[modify] https://crrev.com/2dfc7029286f40d73b131760e3b7467c68b8bb17/gpu/command_buffer/service/context_group.cc
[modify] https://crrev.com/2dfc7029286f40d73b131760e3b7467c68b8bb17/gpu/command_buffer/service/context_group.h
[modify] https://crrev.com/2dfc7029286f40d73b131760e3b7467c68b8bb17/gpu/command_buffer/service/context_group_unittest.cc
[modify] https://crrev.com/2dfc7029286f40d73b131760e3b7467c68b8bb17/gpu/command_buffer/service/gles2_cmd_decoder.cc
[modify] https://crrev.com/2dfc7029286f40d73b131760e3b7467c68b8bb17/gpu/command_buffer/service/gles2_cmd_decoder.h
[modify] https://crrev.com/2dfc7029286f40d73b131760e3b7467c68b8bb17/gpu/command_buffer/service/gles2_cmd_decoder_mock.h
[modify] https://crrev.com/2dfc7029286f40d73b131760e3b7467c68b8bb17/gpu/command_buffer/service/gles2_cmd_decoder_passthrough.cc
[modify] https://crrev.com/2dfc7029286f40d73b131760e3b7467c68b8bb17/gpu/command_buffer/service/gles2_cmd_decoder_passthrough.h
[modify] https://crrev.com/2dfc7029286f40d73b131760e3b7467c68b8bb17/gpu/command_buffer/service/gles2_cmd_decoder_unittest_base.cc
[modify] https://crrev.com/2dfc7029286f40d73b131760e3b7467c68b8bb17/gpu/command_buffer/service/gles2_cmd_decoder_unittest_base.h
[modify] https://crrev.com/2dfc7029286f40d73b131760e3b7467c68b8bb17/gpu/command_buffer/service/gles2_cmd_decoder_unittest_framebuffers.cc
[modify] https://crrev.com/2dfc7029286f40d73b131760e3b7467c68b8bb17/gpu/command_buffer/service/texture_manager.cc
[modify] https://crrev.com/2dfc7029286f40d73b131760e3b7467c68b8bb17/gpu/command_buffer/service/texture_manager.h
[modify] https://crrev.com/2dfc7029286f40d73b131760e3b7467c68b8bb17/gpu/command_buffer/service/texture_manager_unittest.cc