Add compositing WATCHLIST

TBR=vollick@chromium.org
NOTRY=true

Review URL: https://codereview.chromium.org/189663002

git-svn-id: svn://svn.chromium.org/blink/trunk@168690 bbb929c8-8fbe-4397-9dbb-9b2b20218538
Adding an MP4 test file for MediaSource layout tests.

This is just the MP4 equilvalent of LayoutTests/http/tests/media/resources/media-source/webm/test.webm

BUG=350209
TBR=adamk@chromium.org

Review URL: https://codereview.chromium.org/189213005

git-svn-id: svn://svn.chromium.org/blink/trunk@168691 bbb929c8-8fbe-4397-9dbb-9b2b20218538
Avoid redundant setupPaintForDashPathEffect calls.

The previous changes to maintain SkPaint in Graphics context
resulted in excess calls to StrokeData::setupPaintForDashPathEffect
for the most common use case (dashed or dotted borders). This patch
makes it just one call per request for the paint.

R=fmalita@chromium.org
BUG=343240

Review URL: https://codereview.chromium.org/176883025

git-svn-id: svn://svn.chromium.org/blink/trunk@168692 bbb929c8-8fbe-4397-9dbb-9b2b20218538
Replaced ownership of PinchViewport from WebView to FrameHost.

Removed PinchViewport's dependency on WebViewImpl and replaced it with
FrameHost, foreshadowing its move to FrameHost.

BUG=349941

Review URL: https://codereview.chromium.org/186123005

git-svn-id: svn://svn.chromium.org/blink/trunk@168693 bbb929c8-8fbe-4397-9dbb-9b2b20218538