The following revision refers to this bug:
  https://chromium.googlesource.com/chromium/src.git/+/75294fa2de88d8b6cf98b038ceb2992eb4fffa62

commit 75294fa2de88d8b6cf98b038ceb2992eb4fffa62
Author: Guido Urdaneta <guidou@chromium.org>
Date: Thu Jun 14 14:20:29 2018

Remove dead code WebMediaStreamCenterClient.

Drive-by: minor lint/include fixes.

Bug:  852423 
Change-Id: I7ae9b3d0bb74caaee133600eb9a88c93ff74d2ea
Reviewed-on: https://chromium-review.googlesource.com/1099166
Reviewed-by: Jochen Eisinger <jochen@chromium.org>
Commit-Queue: Guido Urdaneta <guidou@chromium.org>
Cr-Commit-Position: refs/heads/master@{#567256}
[modify] https://crrev.com/75294fa2de88d8b6cf98b038ceb2992eb4fffa62/content/renderer/media/stream/media_stream_center.cc
[modify] https://crrev.com/75294fa2de88d8b6cf98b038ceb2992eb4fffa62/content/renderer/media/stream/media_stream_center.h
[modify] https://crrev.com/75294fa2de88d8b6cf98b038ceb2992eb4fffa62/content/renderer/render_thread_impl.cc
[modify] https://crrev.com/75294fa2de88d8b6cf98b038ceb2992eb4fffa62/content/renderer/render_thread_impl.h
[modify] https://crrev.com/75294fa2de88d8b6cf98b038ceb2992eb4fffa62/content/renderer/renderer_blink_platform_impl.cc
[modify] https://crrev.com/75294fa2de88d8b6cf98b038ceb2992eb4fffa62/content/renderer/renderer_blink_platform_impl.h
[modify] https://crrev.com/75294fa2de88d8b6cf98b038ceb2992eb4fffa62/content/shell/renderer/layout_test/layout_test_content_renderer_client.cc
[modify] https://crrev.com/75294fa2de88d8b6cf98b038ceb2992eb4fffa62/third_party/blink/public/BUILD.gn
[modify] https://crrev.com/75294fa2de88d8b6cf98b038ceb2992eb4fffa62/third_party/blink/public/platform/platform.h
[delete] https://crrev.com/6787d068052ed8e7952f386adca0352a08486797/third_party/blink/public/platform/web_media_stream_center_client.h
[modify] https://crrev.com/75294fa2de88d8b6cf98b038ceb2992eb4fffa62/third_party/blink/renderer/platform/exported/platform.cc
[modify] https://crrev.com/75294fa2de88d8b6cf98b038ceb2992eb4fffa62/third_party/blink/renderer/platform/mediastream/media_stream_center.cc
[modify] https://crrev.com/75294fa2de88d8b6cf98b038ceb2992eb4fffa62/third_party/blink/renderer/platform/mediastream/media_stream_center.h