The following revision refers to this bug:
  https://chromium.googlesource.com/chromium/src.git/+/a92266e9d9d2d68f33ffecbfe156cd8c83897831

commit a92266e9d9d2d68f33ffecbfe156cd8c83897831
Author: Mounir Lamouri <mlamouri@chromium.org>
Date: Wed Sep 13 10:35:16 2017

YouTube Flash Embeds: rewrite all embeds, even enablejsapi=1.

YouTube has deprecated Flash embeds so it will provide a better
experience for our users to have them inlined with possible breakage
instead of having to use Flash and navigate to YouTube.

Bug:  763322 
Change-Id: I3243e3048f499ec51e3220ebd18201a94e3eca46
Reviewed-on: https://chromium-review.googlesource.com/657277
Reviewed-by: Jochen Eisinger <jochen@chromium.org>
Commit-Queue: Mounir Lamouri <mlamouri@chromium.org>
Cr-Commit-Position: refs/heads/master@{#501587}
[modify] https://crrev.com/a92266e9d9d2d68f33ffecbfe156cd8c83897831/chrome/renderer/chrome_content_renderer_client.cc
[modify] https://crrev.com/a92266e9d9d2d68f33ffecbfe156cd8c83897831/chrome/renderer/chrome_content_renderer_client_browsertest.cc
[modify] https://crrev.com/a92266e9d9d2d68f33ffecbfe156cd8c83897831/chrome/renderer/chrome_content_renderer_client_unittest.cc