The following revision refers to this bug:
  https://chromium.googlesource.com/chromium/src.git/+/aec7d45bff4c7a8a697034754600f264988714ec

commit aec7d45bff4c7a8a697034754600f264988714ec
Author: reveman <reveman@chromium.org>
Date: Thu Jan 12 20:41:48 2017

cc: Use weak ptr for async read pixel queries.

This cleans up the async read pixel code a bit by using weak ptrs
instead of cancelable callbacks.

BUG= 678234 
TEST=cc_unittests
CQ_INCLUDE_TRYBOTS=master.tryserver.blink:linux_trusty_blink_rel

Review-Url: https://codereview.chromium.org/2628883004
Cr-Commit-Position: refs/heads/master@{#443347}

[modify] https://crrev.com/aec7d45bff4c7a8a697034754600f264988714ec/cc/output/gl_renderer.cc
[modify] https://crrev.com/aec7d45bff4c7a8a697034754600f264988714ec/cc/output/gl_renderer.h

The following revision refers to this bug:
  https://chromium.googlesource.com/chromium/src.git/+/9413cffb4fdc7dbcfc40a8da0530942e2f6ae0f2

commit 9413cffb4fdc7dbcfc40a8da0530942e2f6ae0f2
Author: reveman <reveman@chromium.org>
Date: Wed Jan 18 03:05:48 2017

cc: Implement overdraw feedback debugging feature.

This adds a overdraw feedback debug flag to the GL renderer. This feature
is inspired by the GPU overdraw debug feature that exists on Android and
developers familiar with that feature will feel at home using this flag
when debugging overdraw in web-pages or in the ChromeOS UI.

When enabled, this flag visualize overdraw by color-coding areas of the
output based on how much overdraw is taking place. The colors are
hinting at the amount of overdraw on the screen for each pixel, as follows:

True color: No overdraw
Blue: Overdrawn once
Green: Overdrawn twice
Pink: Overdrawn three times
Red: Overdrawn four or more times

This also adds an overdraw tracing category (cc.debug.overdraw) that
provides a trace counter for the current amount overdraw.

The --ui-disable-partial-swap flag is also added to about:flags in
this patch. Disabling of partial swap is not required for overdraw
feedback but often what you want to make the output easier to diagnose.

BUG= 678234 
TEST=chrome --show-overdraw-feedback, cc_unittests --gtest_filter=GLRendererPixelTestWithOverdrawFeedback.TranslucentRectangles
CQ_INCLUDE_TRYBOTS=master.tryserver.blink:linux_trusty_blink_rel

Review-Url: https://codereview.chromium.org/2612023002
Cr-Commit-Position: refs/heads/master@{#444256}

[modify] https://crrev.com/9413cffb4fdc7dbcfc40a8da0530942e2f6ae0f2/android_webview/browser/parent_output_surface.cc
[modify] https://crrev.com/9413cffb4fdc7dbcfc40a8da0530942e2f6ae0f2/android_webview/browser/parent_output_surface.h
[modify] https://crrev.com/9413cffb4fdc7dbcfc40a8da0530942e2f6ae0f2/cc/base/switches.cc
[modify] https://crrev.com/9413cffb4fdc7dbcfc40a8da0530942e2f6ae0f2/cc/base/switches.h
[modify] https://crrev.com/9413cffb4fdc7dbcfc40a8da0530942e2f6ae0f2/cc/output/direct_renderer.cc
[modify] https://crrev.com/9413cffb4fdc7dbcfc40a8da0530942e2f6ae0f2/cc/output/direct_renderer.h
[modify] https://crrev.com/9413cffb4fdc7dbcfc40a8da0530942e2f6ae0f2/cc/output/gl_renderer.cc
[modify] https://crrev.com/9413cffb4fdc7dbcfc40a8da0530942e2f6ae0f2/cc/output/gl_renderer.h
[modify] https://crrev.com/9413cffb4fdc7dbcfc40a8da0530942e2f6ae0f2/cc/output/gl_renderer_unittest.cc
[modify] https://crrev.com/9413cffb4fdc7dbcfc40a8da0530942e2f6ae0f2/cc/output/output_surface.h
[modify] https://crrev.com/9413cffb4fdc7dbcfc40a8da0530942e2f6ae0f2/cc/output/overlay_unittest.cc
[modify] https://crrev.com/9413cffb4fdc7dbcfc40a8da0530942e2f6ae0f2/cc/output/renderer_pixeltest.cc
[modify] https://crrev.com/9413cffb4fdc7dbcfc40a8da0530942e2f6ae0f2/cc/output/renderer_settings.cc
[modify] https://crrev.com/9413cffb4fdc7dbcfc40a8da0530942e2f6ae0f2/cc/output/renderer_settings.h
[add] https://crrev.com/9413cffb4fdc7dbcfc40a8da0530942e2f6ae0f2/cc/test/data/translucent_rectangles.png
[modify] https://crrev.com/9413cffb4fdc7dbcfc40a8da0530942e2f6ae0f2/cc/test/fake_output_surface.cc
[modify] https://crrev.com/9413cffb4fdc7dbcfc40a8da0530942e2f6ae0f2/cc/test/fake_output_surface.h
[modify] https://crrev.com/9413cffb4fdc7dbcfc40a8da0530942e2f6ae0f2/cc/test/pixel_test_output_surface.cc
[modify] https://crrev.com/9413cffb4fdc7dbcfc40a8da0530942e2f6ae0f2/cc/test/pixel_test_output_surface.h
[modify] https://crrev.com/9413cffb4fdc7dbcfc40a8da0530942e2f6ae0f2/chrome/app/generated_resources.grd
[modify] https://crrev.com/9413cffb4fdc7dbcfc40a8da0530942e2f6ae0f2/chrome/browser/about_flags.cc
[modify] https://crrev.com/9413cffb4fdc7dbcfc40a8da0530942e2f6ae0f2/components/display_compositor/buffer_queue.cc
[modify] https://crrev.com/9413cffb4fdc7dbcfc40a8da0530942e2f6ae0f2/components/display_compositor/buffer_queue.h
[modify] https://crrev.com/9413cffb4fdc7dbcfc40a8da0530942e2f6ae0f2/components/display_compositor/buffer_queue_unittest.cc
[modify] https://crrev.com/9413cffb4fdc7dbcfc40a8da0530942e2f6ae0f2/content/browser/compositor/gpu_browser_compositor_output_surface.cc
[modify] https://crrev.com/9413cffb4fdc7dbcfc40a8da0530942e2f6ae0f2/content/browser/compositor/gpu_browser_compositor_output_surface.h
[modify] https://crrev.com/9413cffb4fdc7dbcfc40a8da0530942e2f6ae0f2/content/browser/compositor/gpu_surfaceless_browser_compositor_output_surface.cc
[modify] https://crrev.com/9413cffb4fdc7dbcfc40a8da0530942e2f6ae0f2/content/browser/compositor/gpu_surfaceless_browser_compositor_output_surface.h
[modify] https://crrev.com/9413cffb4fdc7dbcfc40a8da0530942e2f6ae0f2/content/browser/compositor/offscreen_browser_compositor_output_surface.cc
[modify] https://crrev.com/9413cffb4fdc7dbcfc40a8da0530942e2f6ae0f2/content/browser/compositor/offscreen_browser_compositor_output_surface.h
[modify] https://crrev.com/9413cffb4fdc7dbcfc40a8da0530942e2f6ae0f2/content/browser/compositor/reflector_impl_unittest.cc
[modify] https://crrev.com/9413cffb4fdc7dbcfc40a8da0530942e2f6ae0f2/content/browser/compositor/software_browser_compositor_output_surface.cc
[modify] https://crrev.com/9413cffb4fdc7dbcfc40a8da0530942e2f6ae0f2/content/browser/compositor/software_browser_compositor_output_surface.h
[modify] https://crrev.com/9413cffb4fdc7dbcfc40a8da0530942e2f6ae0f2/content/browser/renderer_host/compositor_impl_android.cc
[modify] https://crrev.com/9413cffb4fdc7dbcfc40a8da0530942e2f6ae0f2/content/renderer/android/synchronous_compositor_frame_sink.cc
[modify] https://crrev.com/9413cffb4fdc7dbcfc40a8da0530942e2f6ae0f2/services/ui/surfaces/display_output_surface.cc
[modify] https://crrev.com/9413cffb4fdc7dbcfc40a8da0530942e2f6ae0f2/services/ui/surfaces/display_output_surface.h
[modify] https://crrev.com/9413cffb4fdc7dbcfc40a8da0530942e2f6ae0f2/services/ui/surfaces/display_output_surface_ozone.cc
[modify] https://crrev.com/9413cffb4fdc7dbcfc40a8da0530942e2f6ae0f2/services/ui/surfaces/display_output_surface_ozone.h
[modify] https://crrev.com/9413cffb4fdc7dbcfc40a8da0530942e2f6ae0f2/tools/metrics/histograms/histograms.xml
[modify] https://crrev.com/9413cffb4fdc7dbcfc40a8da0530942e2f6ae0f2/ui/compositor/compositor.cc
[modify] https://crrev.com/9413cffb4fdc7dbcfc40a8da0530942e2f6ae0f2/ui/compositor/test/in_process_context_factory.cc

The following revision refers to this bug:
  https://chromium.googlesource.com/chromium/src.git/+/db06141ebf2aa70c3ffdad7a112153568e93d8bc

commit db06141ebf2aa70c3ffdad7a112153568e93d8bc
Author: reveman <reveman@chromium.org>
Date: Thu Jan 19 05:29:05 2017

content: Add overdraw feedback support for X11 ChromeOS builds.

This allows the overdraw feedback debugging feature to not only
be used on ChromeOS devices but also on Linux workstations.

BUG= 678234 

Review-Url: https://codereview.chromium.org/2643623004
Cr-Commit-Position: refs/heads/master@{#444653}

[modify] https://crrev.com/db06141ebf2aa70c3ffdad7a112153568e93d8bc/content/browser/compositor/gpu_browser_compositor_output_surface.cc
[modify] https://crrev.com/db06141ebf2aa70c3ffdad7a112153568e93d8bc/content/browser/compositor/gpu_browser_compositor_output_surface.h
[modify] https://crrev.com/db06141ebf2aa70c3ffdad7a112153568e93d8bc/content/browser/compositor/gpu_process_transport_factory.cc
[modify] https://crrev.com/db06141ebf2aa70c3ffdad7a112153568e93d8bc/content/browser/compositor/gpu_surfaceless_browser_compositor_output_surface.cc
[modify] https://crrev.com/db06141ebf2aa70c3ffdad7a112153568e93d8bc/content/browser/compositor/mus_browser_compositor_output_surface.cc

The following revision refers to this bug:
  https://chromium.googlesource.com/chromium/src.git/+/e2f29f0eda0cb38f57db34c7343ef4e6cce40263

commit e2f29f0eda0cb38f57db34c7343ef4e6cce40263
Author: reveman <reveman@chromium.org>
Date: Fri Jan 20 20:40:30 2017

gpu: Add ARB_occlusion_query support.

This adds support for GL_ARB_occlusion_query and improves overdraw
tracing by using this extension to collect exact amount of overdraw.

BUG= 678234 
CQ_INCLUDE_TRYBOTS=master.tryserver.blink:linux_trusty_blink_rel

Review-Url: https://codereview.chromium.org/2639293002
Cr-Commit-Position: refs/heads/master@{#445151}

[modify] https://crrev.com/e2f29f0eda0cb38f57db34c7343ef4e6cce40263/cc/output/gl_renderer.cc
[modify] https://crrev.com/e2f29f0eda0cb38f57db34c7343ef4e6cce40263/cc/output/gl_renderer.h
[modify] https://crrev.com/e2f29f0eda0cb38f57db34c7343ef4e6cce40263/gpu/GLES2/gl2extchromium.h
[modify] https://crrev.com/e2f29f0eda0cb38f57db34c7343ef4e6cce40263/gpu/command_buffer/build_gles2_cmd_buffer.py
[modify] https://crrev.com/e2f29f0eda0cb38f57db34c7343ef4e6cce40263/gpu/command_buffer/client/gles2_implementation.cc
[modify] https://crrev.com/e2f29f0eda0cb38f57db34c7343ef4e6cce40263/gpu/command_buffer/common/capabilities.cc
[modify] https://crrev.com/e2f29f0eda0cb38f57db34c7343ef4e6cce40263/gpu/command_buffer/common/capabilities.h
[modify] https://crrev.com/e2f29f0eda0cb38f57db34c7343ef4e6cce40263/gpu/command_buffer/common/gles2_cmd_utils_implementation_autogen.h
[modify] https://crrev.com/e2f29f0eda0cb38f57db34c7343ef4e6cce40263/gpu/command_buffer/service/feature_info.cc
[modify] https://crrev.com/e2f29f0eda0cb38f57db34c7343ef4e6cce40263/gpu/command_buffer/service/feature_info.h
[modify] https://crrev.com/e2f29f0eda0cb38f57db34c7343ef4e6cce40263/gpu/command_buffer/service/gles2_cmd_decoder.cc
[modify] https://crrev.com/e2f29f0eda0cb38f57db34c7343ef4e6cce40263/gpu/command_buffer/service/gles2_cmd_decoder_unittest.cc
[modify] https://crrev.com/e2f29f0eda0cb38f57db34c7343ef4e6cce40263/gpu/command_buffer/service/gles2_cmd_validation_implementation_autogen.h
[modify] https://crrev.com/e2f29f0eda0cb38f57db34c7343ef4e6cce40263/gpu/command_buffer/service/query_manager.cc
[modify] https://crrev.com/e2f29f0eda0cb38f57db34c7343ef4e6cce40263/gpu/command_buffer/service/query_manager_unittest.cc
[modify] https://crrev.com/e2f29f0eda0cb38f57db34c7343ef4e6cce40263/gpu/ipc/common/gpu_command_buffer_traits_multi.h
[modify] https://crrev.com/e2f29f0eda0cb38f57db34c7343ef4e6cce40263/ui/gl/gl_bindings.h