The following revision refers to this bug:
  https://chromium.googlesource.com/chromium/src.git/+/bd9bf68829a9392e3cb76960ae26d52cb1ccfd91

commit bd9bf68829a9392e3cb76960ae26d52cb1ccfd91
Author: Christian Fremerey <chfremer@chromium.org>
Date: Thu Aug 23 00:38:14 2018

[Video Capture] Distinguish and log error cases

Adds an enum for distinguishing which call sites trigger video
capture errors. The goal of this work is to improve the UMA logging
by differentiating various possible sources of error events. Doing
so will help us better understand what error events contribute most
to the high error counts and will help us better pinpoint causes
for future changes in error counts.

Design Doc: https://docs.google.com/document/d/1chso0ntOMecY7SfcrQzkHLuBAxO_oUwSpOhy1MrXAhc/edit?usp=sharing

Bug: 849636,  876002 
Change-Id: I02fcc8930ff7e66a15c91c4393bf9a280383902b
Reviewed-on: https://chromium-review.googlesource.com/1180412
Commit-Queue: Christian Fremerey <chfremer@chromium.org>
Reviewed-by: Robert Sesek <rsesek@chromium.org>
Reviewed-by: John Abd-El-Malek <jam@chromium.org>
Reviewed-by: Mark Pearson <mpearson@chromium.org>
Reviewed-by: Emircan Uysaler <emircan@chromium.org>
Cr-Commit-Position: refs/heads/master@{#585336}
[modify] https://crrev.com/bd9bf68829a9392e3cb76960ae26d52cb1ccfd91/components/mirroring/browser/single_client_video_capture_host.cc
[modify] https://crrev.com/bd9bf68829a9392e3cb76960ae26d52cb1ccfd91/components/mirroring/browser/single_client_video_capture_host.h
[modify] https://crrev.com/bd9bf68829a9392e3cb76960ae26d52cb1ccfd91/content/browser/media/capture/desktop_capture_device.cc
[modify] https://crrev.com/bd9bf68829a9392e3cb76960ae26d52cb1ccfd91/content/browser/media/capture/desktop_capture_device_unittest.cc
[modify] https://crrev.com/bd9bf68829a9392e3cb76960ae26d52cb1ccfd91/content/browser/media/capture/fake_video_capture_stack.cc
[modify] https://crrev.com/bd9bf68829a9392e3cb76960ae26d52cb1ccfd91/content/browser/media/capture/frame_sink_video_capture_device.cc
[modify] https://crrev.com/bd9bf68829a9392e3cb76960ae26d52cb1ccfd91/content/browser/media/capture/frame_sink_video_capture_device_unittest.cc
[modify] https://crrev.com/bd9bf68829a9392e3cb76960ae26d52cb1ccfd91/content/browser/media/capture/screen_capture_device_android.cc
[modify] https://crrev.com/bd9bf68829a9392e3cb76960ae26d52cb1ccfd91/content/browser/media/capture/screen_capture_device_android_unittest.cc
[modify] https://crrev.com/bd9bf68829a9392e3cb76960ae26d52cb1ccfd91/content/browser/renderer_host/media/in_process_video_capture_device_launcher.cc
[modify] https://crrev.com/bd9bf68829a9392e3cb76960ae26d52cb1ccfd91/content/browser/renderer_host/media/service_video_capture_device_launcher.cc
[modify] https://crrev.com/bd9bf68829a9392e3cb76960ae26d52cb1ccfd91/content/browser/renderer_host/media/service_video_capture_device_launcher_unittest.cc
[modify] https://crrev.com/bd9bf68829a9392e3cb76960ae26d52cb1ccfd91/content/browser/renderer_host/media/service_video_capture_provider_unittest.cc
[modify] https://crrev.com/bd9bf68829a9392e3cb76960ae26d52cb1ccfd91/content/browser/renderer_host/media/video_capture_browsertest.cc
[modify] https://crrev.com/bd9bf68829a9392e3cb76960ae26d52cb1ccfd91/content/browser/renderer_host/media/video_capture_controller.cc
[modify] https://crrev.com/bd9bf68829a9392e3cb76960ae26d52cb1ccfd91/content/browser/renderer_host/media/video_capture_controller.h
[modify] https://crrev.com/bd9bf68829a9392e3cb76960ae26d52cb1ccfd91/content/browser/renderer_host/media/video_capture_controller_event_handler.h
[modify] https://crrev.com/bd9bf68829a9392e3cb76960ae26d52cb1ccfd91/content/browser/renderer_host/media/video_capture_controller_unittest.cc
[modify] https://crrev.com/bd9bf68829a9392e3cb76960ae26d52cb1ccfd91/content/browser/renderer_host/media/video_capture_device_launch_observer.h
[modify] https://crrev.com/bd9bf68829a9392e3cb76960ae26d52cb1ccfd91/content/browser/renderer_host/media/video_capture_host.cc
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[modify] https://crrev.com/bd9bf68829a9392e3cb76960ae26d52cb1ccfd91/content/browser/renderer_host/media/video_capture_manager.h
[modify] https://crrev.com/bd9bf68829a9392e3cb76960ae26d52cb1ccfd91/content/browser/renderer_host/media/video_capture_manager_unittest.cc
[modify] https://crrev.com/bd9bf68829a9392e3cb76960ae26d52cb1ccfd91/content/browser/renderer_host/media/video_capture_unittest.cc
[modify] https://crrev.com/bd9bf68829a9392e3cb76960ae26d52cb1ccfd91/content/public/browser/video_capture_device_launcher.h
[modify] https://crrev.com/bd9bf68829a9392e3cb76960ae26d52cb1ccfd91/media/capture/content/android/screen_capture_machine_android.cc
[modify] https://crrev.com/bd9bf68829a9392e3cb76960ae26d52cb1ccfd91/media/capture/content/android/thread_safe_capture_oracle.cc
[modify] https://crrev.com/bd9bf68829a9392e3cb76960ae26d52cb1ccfd91/media/capture/content/android/thread_safe_capture_oracle.h
[modify] https://crrev.com/bd9bf68829a9392e3cb76960ae26d52cb1ccfd91/media/capture/mojom/video_capture_types.mojom
[modify] https://crrev.com/bd9bf68829a9392e3cb76960ae26d52cb1ccfd91/media/capture/mojom/video_capture_types.typemap
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[modify] https://crrev.com/bd9bf68829a9392e3cb76960ae26d52cb1ccfd91/media/capture/mojom/video_capture_types_mojom_traits.h
[modify] https://crrev.com/bd9bf68829a9392e3cb76960ae26d52cb1ccfd91/media/capture/video/android/java/src/org/chromium/media/VideoCapture.java
[modify] https://crrev.com/bd9bf68829a9392e3cb76960ae26d52cb1ccfd91/media/capture/video/android/java/src/org/chromium/media/VideoCaptureCamera.java
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[modify] https://crrev.com/bd9bf68829a9392e3cb76960ae26d52cb1ccfd91/media/capture/video/chromeos/camera_device_context.cc
[modify] https://crrev.com/bd9bf68829a9392e3cb76960ae26d52cb1ccfd91/media/capture/video/chromeos/camera_device_context.h
[modify] https://crrev.com/bd9bf68829a9392e3cb76960ae26d52cb1ccfd91/media/capture/video/chromeos/camera_device_delegate.cc
[modify] https://crrev.com/bd9bf68829a9392e3cb76960ae26d52cb1ccfd91/media/capture/video/chromeos/camera_device_delegate_unittest.cc
[modify] https://crrev.com/bd9bf68829a9392e3cb76960ae26d52cb1ccfd91/media/capture/video/chromeos/mock_video_capture_client.cc
[modify] https://crrev.com/bd9bf68829a9392e3cb76960ae26d52cb1ccfd91/media/capture/video/chromeos/mock_video_capture_client.h
[modify] https://crrev.com/bd9bf68829a9392e3cb76960ae26d52cb1ccfd91/media/capture/video/chromeos/stream_buffer_manager.cc
[modify] https://crrev.com/bd9bf68829a9392e3cb76960ae26d52cb1ccfd91/media/capture/video/chromeos/stream_buffer_manager_unittest.cc
[modify] https://crrev.com/bd9bf68829a9392e3cb76960ae26d52cb1ccfd91/media/capture/video/chromeos/video_capture_device_chromeos_halv3.cc
[modify] https://crrev.com/bd9bf68829a9392e3cb76960ae26d52cb1ccfd91/media/capture/video/fake_video_capture_device_factory.cc
[modify] https://crrev.com/bd9bf68829a9392e3cb76960ae26d52cb1ccfd91/media/capture/video/fake_video_capture_device_unittest.cc
[modify] https://crrev.com/bd9bf68829a9392e3cb76960ae26d52cb1ccfd91/media/capture/video/file_video_capture_device.cc
[modify] https://crrev.com/bd9bf68829a9392e3cb76960ae26d52cb1ccfd91/media/capture/video/file_video_capture_device_unittest.cc
[modify] https://crrev.com/bd9bf68829a9392e3cb76960ae26d52cb1ccfd91/media/capture/video/linux/v4l2_capture_delegate.cc
[modify] https://crrev.com/bd9bf68829a9392e3cb76960ae26d52cb1ccfd91/media/capture/video/linux/v4l2_capture_delegate.h
[modify] https://crrev.com/bd9bf68829a9392e3cb76960ae26d52cb1ccfd91/media/capture/video/linux/video_capture_device_linux.cc
[modify] https://crrev.com/bd9bf68829a9392e3cb76960ae26d52cb1ccfd91/media/capture/video/mac/video_capture_device_avfoundation_mac.mm
[modify] https://crrev.com/bd9bf68829a9392e3cb76960ae26d52cb1ccfd91/media/capture/video/mac/video_capture_device_decklink_mac.h
[modify] https://crrev.com/bd9bf68829a9392e3cb76960ae26d52cb1ccfd91/media/capture/video/mac/video_capture_device_decklink_mac.mm
[modify] https://crrev.com/bd9bf68829a9392e3cb76960ae26d52cb1ccfd91/media/capture/video/mac/video_capture_device_mac.h
[modify] https://crrev.com/bd9bf68829a9392e3cb76960ae26d52cb1ccfd91/media/capture/video/mac/video_capture_device_mac.mm
[modify] https://crrev.com/bd9bf68829a9392e3cb76960ae26d52cb1ccfd91/media/capture/video/mock_video_capture_device_client.h
[modify] https://crrev.com/bd9bf68829a9392e3cb76960ae26d52cb1ccfd91/media/capture/video/mock_video_frame_receiver.h
[modify] https://crrev.com/bd9bf68829a9392e3cb76960ae26d52cb1ccfd91/media/capture/video/video_capture_device.h
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[modify] https://crrev.com/bd9bf68829a9392e3cb76960ae26d52cb1ccfd91/media/capture/video/video_capture_device_client.h
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[modify] https://crrev.com/bd9bf68829a9392e3cb76960ae26d52cb1ccfd91/media/capture/video/video_frame_receiver.h
[modify] https://crrev.com/bd9bf68829a9392e3cb76960ae26d52cb1ccfd91/media/capture/video/video_frame_receiver_on_task_runner.cc
[modify] https://crrev.com/bd9bf68829a9392e3cb76960ae26d52cb1ccfd91/media/capture/video/video_frame_receiver_on_task_runner.h
[modify] https://crrev.com/bd9bf68829a9392e3cb76960ae26d52cb1ccfd91/media/capture/video/win/video_capture_device_mf_win.cc
[modify] https://crrev.com/bd9bf68829a9392e3cb76960ae26d52cb1ccfd91/media/capture/video/win/video_capture_device_mf_win.h
[modify] https://crrev.com/bd9bf68829a9392e3cb76960ae26d52cb1ccfd91/media/capture/video/win/video_capture_device_mf_win_unittest.cc
[modify] https://crrev.com/bd9bf68829a9392e3cb76960ae26d52cb1ccfd91/media/capture/video/win/video_capture_device_win.cc
[modify] https://crrev.com/bd9bf68829a9392e3cb76960ae26d52cb1ccfd91/media/capture/video/win/video_capture_device_win.h
[modify] https://crrev.com/bd9bf68829a9392e3cb76960ae26d52cb1ccfd91/media/capture/video_capture_types.h
[modify] https://crrev.com/bd9bf68829a9392e3cb76960ae26d52cb1ccfd91/services/video_capture/device_media_to_mojo_adapter.cc
[modify] https://crrev.com/bd9bf68829a9392e3cb76960ae26d52cb1ccfd91/services/video_capture/public/cpp/receiver_media_to_mojo_adapter.cc
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[modify] https://crrev.com/bd9bf68829a9392e3cb76960ae26d52cb1ccfd91/services/video_capture/public/mojom/receiver.mojom
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[modify] https://crrev.com/bd9bf68829a9392e3cb76960ae26d52cb1ccfd91/services/video_capture/receiver_mojo_to_media_adapter.h
[modify] https://crrev.com/bd9bf68829a9392e3cb76960ae26d52cb1ccfd91/services/video_capture/test/mock_receiver.h
[modify] https://crrev.com/bd9bf68829a9392e3cb76960ae26d52cb1ccfd91/tools/metrics/histograms/enums.xml
[modify] https://crrev.com/bd9bf68829a9392e3cb76960ae26d52cb1ccfd91/tools/metrics/histograms/histograms.xml

Issue 855683 has been merged into this issue.