commit 590011e3f3b68faf7f68592b3b931181e0cb4672
author avayvod <avayvod@chromium.org> Fri Jan 20 02:01:00 2017
committer Commit bot <commit-bot@chromium.org> Fri Jan 20 02:01:00 2017
tree 5162a82184eec30fa000411d9982cefb7549a24f
parent bcfa0007f638e46826cf0803746dfd90c53d6fc4

[Video] Set the max keyframe distance for background optimization via FieldTrials.

Get a field trial variations param as the time in milliseconds. Pass it from
RenderViewHostImpl in the browser process to the renderer's RenderFrameImpl via
WebPreferences. Set the value in WebMediaPlayerParams when WebMediaPlayerImpl is
created.

BUG=663999
TEST=manually with chrome --enable-features="BackgroundVideoTrackOptimization<Study" --force-fieldtrials=Study/Group1 --force-fieldtrial-params=Study.Group1:max_keyframe_distance_ms/1000

Review-Url: https://codereview.chromium.org/2628313002
Cr-Commit-Position: refs/heads/master@{#444946}