Lock video controls' position during fullscreen
Problem:
Video controls can be scrolled (moved) when
an Android WebView does fullscreen-video.
Solution:
When visual viewport's scrolling is disabled
using setUserScrollable(false, false), do
also disable over-scrolling (do not send
overscroll-events to the Android WebView).
BUG=448738
TEST=
1. Start com.android.browser and go to
http://robnyman.github.io/fullscreen/ .
2. Start video playback.
3. Go fullscreen on video.
4. Fling the screen.
5. Notice 1: Video controls cannot move.
6. Notice 2: No "over glow" (compare with
Android Chrome or Lollipop's WebView).
CQ_INCLUDE_TRYBOTS=tryserver.blink:linux_blink_rel
Review URL: https://codereview.chromium.org/
1228423002
Cr-Commit-Position: refs/heads/master@{#343675}