Make FileWriterBase RefCountedGarbageCollectedWillBeGarbageCollectedFinalized

Now {,un}setPendingActivity is removed from FileWriter.
We can make this GarbageCollectedFinalized.

BUG=357163

Review URL: https://codereview.chromium.org/394623005

git-svn-id: svn://svn.chromium.org/blink/trunk@178130 bbb929c8-8fbe-4397-9dbb-9b2b20218538
Gardening: more Retina failures

Add to the many layout tests that suddenly started failing on Retina,
see bug.

BUG=393706
TBR=junov

Review URL: https://codereview.chromium.org/392833002

git-svn-id: svn://svn.chromium.org/blink/trunk@178131 bbb929c8-8fbe-4397-9dbb-9b2b20218538
Don't treat width and height as shorthands in CSSShorthands.in

Currently CSSShorthands.in considers width and height to be shorthands,
although in regular css they are not shorthands and the behaviour is only
for parsing viewport descriptors. Removing this behaviour will make it
easier to merge the css property related .in files.

Having width and height in the shorthands system was added in:
https://codereview.chromium.org/16161005

Review URL: https://codereview.chromium.org/388153004

git-svn-id: svn://svn.chromium.org/blink/trunk@178132 bbb929c8-8fbe-4397-9dbb-9b2b20218538
Make FileReader RefCountedWillBeGarbageCollectedFinalized

Before this patch, FileReader was RefCountedWillBeRefCountedGarbageCollected.
We have removed {,un}setPendingActivity from FileReader, so we can now make
this GarbageCollectedFinalized.

BUG=357163

Review URL: https://codereview.chromium.org/393703003

git-svn-id: svn://svn.chromium.org/blink/trunk@178133 bbb929c8-8fbe-4397-9dbb-9b2b20218538
remove willRequestAfterPreconnect

These were added to measure effect of mousedown preconnecting, but the
experiment is no longer active and no caller of these functions exist.

BUG=386888

Review URL: https://codereview.chromium.org/397493003

git-svn-id: svn://svn.chromium.org/blink/trunk@178134 bbb929c8-8fbe-4397-9dbb-9b2b20218538
Eliminate MediaPlayer abstraction(seek, duration, poster APIs)

BUG=350571

Review URL: https://codereview.chromium.org/388803005

git-svn-id: svn://svn.chromium.org/blink/trunk@178135 bbb929c8-8fbe-4397-9dbb-9b2b20218538