The following revision refers to this bug:
  https://chromium.googlesource.com/chromium/src.git/+/bea0d6b3c467e05183fb88d06a829a6d7e7d136a

commit bea0d6b3c467e05183fb88d06a829a6d7e7d136a
Author: Peng Huang <penghuang@chromium.org>
Date: Fri Nov 09 10:03:03 2018

Move context state related methods out of DecoderContext

This CL adds a new GLContextVirtualDelegate interface to contain all
context state related methods from DecoderContext. After this one, I am
going to implement GLContextVirtualDelegate in RasterDecoderContextState
and only create one GLContextVirtual for all raster decoder and display
compositor.

Bug:  900941 ,  902904 
Change-Id: I10d80bea8531885c449a2e676ce0552e9363b34c
Reviewed-on: https://chromium-review.googlesource.com/c/1312338
Reviewed-by: Antoine Labour <piman@chromium.org>
Commit-Queue: Peng Huang <penghuang@chromium.org>
Cr-Commit-Position: refs/heads/master@{#606777}
[modify] https://crrev.com/bea0d6b3c467e05183fb88d06a829a6d7e7d136a/gpu/command_buffer/service/BUILD.gn
[modify] https://crrev.com/bea0d6b3c467e05183fb88d06a829a6d7e7d136a/gpu/command_buffer/service/decoder_context.h
[modify] https://crrev.com/bea0d6b3c467e05183fb88d06a829a6d7e7d136a/gpu/command_buffer/service/gl_context_virtual.cc
[modify] https://crrev.com/bea0d6b3c467e05183fb88d06a829a6d7e7d136a/gpu/command_buffer/service/gl_context_virtual.h
[add] https://crrev.com/bea0d6b3c467e05183fb88d06a829a6d7e7d136a/gpu/command_buffer/service/gl_context_virtual_delegate.h
[modify] https://crrev.com/bea0d6b3c467e05183fb88d06a829a6d7e7d136a/gpu/command_buffer/service/gl_state_restorer_impl.cc
[modify] https://crrev.com/bea0d6b3c467e05183fb88d06a829a6d7e7d136a/gpu/command_buffer/service/gl_state_restorer_impl.h
[modify] https://crrev.com/bea0d6b3c467e05183fb88d06a829a6d7e7d136a/gpu/command_buffer/service/raster_decoder.cc
[modify] https://crrev.com/bea0d6b3c467e05183fb88d06a829a6d7e7d136a/gpu/command_buffer/service/raster_decoder_context_state.cc
[modify] https://crrev.com/bea0d6b3c467e05183fb88d06a829a6d7e7d136a/gpu/command_buffer/service/raster_decoder_context_state.h
[modify] https://crrev.com/bea0d6b3c467e05183fb88d06a829a6d7e7d136a/gpu/command_buffer/service/wrapped_sk_image.cc

The following revision refers to this bug:
  https://chromium.googlesource.com/chromium/src.git/+/e4accf842d18254cad95947e47660f291b6c5ef6

commit e4accf842d18254cad95947e47660f291b6c5ef6
Author: Peng Huang <penghuang@chromium.org>
Date: Wed Dec 12 22:22:47 2018

Enable virualized context for SkiaRenderer code path

Bug:  900941 ,  902904 
Change-Id: I1b374fe1efd9c0612fc6f42a84eefd8bc3b1e320
Reviewed-on: https://chromium-review.googlesource.com/c/1370189
Commit-Queue: Peng Huang <penghuang@chromium.org>
Reviewed-by: Jonathan Backer <backer@chromium.org>
Cr-Commit-Position: refs/heads/master@{#616083}
[modify] https://crrev.com/e4accf842d18254cad95947e47660f291b6c5ef6/components/viz/service/display_embedder/skia_output_surface_impl_on_gpu.cc
[modify] https://crrev.com/e4accf842d18254cad95947e47660f291b6c5ef6/components/viz/service/display_embedder/skia_output_surface_impl_on_gpu.h
[modify] https://crrev.com/e4accf842d18254cad95947e47660f291b6c5ef6/components/viz/service/gl/gpu_service_impl.cc
[modify] https://crrev.com/e4accf842d18254cad95947e47660f291b6c5ef6/gpu/ipc/in_process_command_buffer.cc
[modify] https://crrev.com/e4accf842d18254cad95947e47660f291b6c5ef6/gpu/ipc/service/gles2_command_buffer_stub.cc
[modify] https://crrev.com/e4accf842d18254cad95947e47660f291b6c5ef6/gpu/ipc/service/gpu_channel_manager.cc

I think this issue has been fixed. Next, we will remove GLContextVirtual and make decoders, display compositor, etc to use GLContext directly. I will file a new issue for it.