GitLab

This is the last CL on Onion Soup'ing
content/renderer/media_capture_from_element.

The migration was straightforward. Highlights:
- CreateHTMLAudioElementCapturer was moved from blink::Platform to
  html_media_element_capture.cc's anonymous namespace, where it is used.
- content -> blink namespace
- base::Bind{Once,Repeating} -> WTF::Bind{Repeating}
- Removed the use of ScopedTaskEnvironment from the unit tests,
  since the run_blink_ has it already.

BUG=787261
R=dalecurtis@chromium.org, guidou@chromium.org, haraken@chromium.org

Change-Id: I187cfc0889bac56e66d92b2aab79a3a7eb25f76c
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1631871
Commit-Queue: Antonio Gomes <tonikitoo@igalia.com>
Reviewed-by: Guido Urdaneta <guidou@chromium.org>
Reviewed-by: Kentaro Hara <haraken@chromium.org>
Reviewed-by: Dale Curtis <dalecurtis@chromium.org>
Cr-Commit-Position: refs/heads/master@{#665034}