The following revision refers to this bug:
  https://chromium.googlesource.com/chromium/src.git/+/569445a9fd1759f7781e055c4f04173c31fa3f1a

commit 569445a9fd1759f7781e055c4f04173c31fa3f1a
Author: guidou <guidou@chromium.org>
Date: Wed Sep 28 18:57:11 2016

Remove cancelMediaDevicesRequest dead code.

BUG= 650605 

Review-Url: https://codereview.chromium.org/2377613002
Cr-Commit-Position: refs/heads/master@{#421593}

[modify] https://crrev.com/569445a9fd1759f7781e055c4f04173c31fa3f1a/components/test_runner/mock_web_user_media_client.cc
[modify] https://crrev.com/569445a9fd1759f7781e055c4f04173c31fa3f1a/components/test_runner/mock_web_user_media_client.h
[modify] https://crrev.com/569445a9fd1759f7781e055c4f04173c31fa3f1a/content/renderer/media/user_media_client_impl.cc
[modify] https://crrev.com/569445a9fd1759f7781e055c4f04173c31fa3f1a/content/renderer/media/user_media_client_impl.h
[modify] https://crrev.com/569445a9fd1759f7781e055c4f04173c31fa3f1a/third_party/WebKit/Source/modules/mediastream/UserMediaClient.h
[modify] https://crrev.com/569445a9fd1759f7781e055c4f04173c31fa3f1a/third_party/WebKit/Source/modules/mediastream/UserMediaController.h
[modify] https://crrev.com/569445a9fd1759f7781e055c4f04173c31fa3f1a/third_party/WebKit/Source/web/UserMediaClientImpl.cpp
[modify] https://crrev.com/569445a9fd1759f7781e055c4f04173c31fa3f1a/third_party/WebKit/Source/web/UserMediaClientImpl.h
[modify] https://crrev.com/569445a9fd1759f7781e055c4f04173c31fa3f1a/third_party/WebKit/public/web/WebUserMediaClient.h