Allow Web Animations CSS flag to be turned off as well as on

Allow Web Animations CSS flag to be turned off as well as on

This is a first step towards switching to Web Animations as the default
implementation of CSS animations and transitions. When that switch is made, a
virtual test suite will be added to run the animations and transitions
LayoutTests with the legacy animations engine. Those virtual suites will
require this --disable-web-animations-css flag.

Also pass an explicit value to WebRuntimeFeatures::enableWebAnimationsSVG(), to
allow the default value to be removed from Blink.

BUG=258896
R=dstockwell@chromium.org, jam@chromium.org, dstockwell

Committed: https://src.chromium.org/viewvc/chrome?view=rev&revision=235301

[Steve Block, 2013-11-14 04:40:37]

This depends on r161978 being rolled into Chromium -
https://codereview.chromium.org/66023004

[Steve Block, 2013-11-14 09:33:37]

Rolled in with r235108 - https://codereview.chromium.org/72443003

[dstockwell, 2013-11-14 22:47:20]

lgtm

[commit-bot: I haz the power, 2013-11-14 23:41:10]

CQ is trying da patch. Follow status at
https://chromium-status.appspot.com/cq/steveblock@chromium.org/61643025/1

[jam, 2013-11-15 01:18:05]

lgtm with nit

https://codereview.chromium.org/61643025/diff/1/content/public/common/content...
File content/public/common/content_switches.h (right):

https://codereview.chromium.org/61643025/diff/1/content/public/common/content...
content/public/common/content_switches.h:175: extern const char
kDisableWebAnimationsCSS[];
please sort, also the cc file

[Steve Block, 2013-11-15 01:25:19]

https://codereview.chromium.org/61643025/diff/1/content/public/common/content...
File content/public/common/content_switches.h (right):

https://codereview.chromium.org/61643025/diff/1/content/public/common/content...
content/public/common/content_switches.h:175: extern const char
kDisableWebAnimationsCSS[];
On 2013/11/15 01:18:06, jam wrote:
> please sort, also the cc file

Done.

[commit-bot: I haz the power, 2013-11-15 01:29:38]

CQ is trying da patch. Follow status at
https://chromium-status.appspot.com/cq/steveblock@chromium.org/61643025/1

[commit-bot: I haz the power, 2013-11-15 01:30:52]

Failed to trigger a try job on mac_rel
HTTP Error 400: Bad Request

[commit-bot: I haz the power, 2013-11-15 03:55:35]

CQ is trying da patch. Follow status at
https://chromium-status.appspot.com/cq/steveblock@chromium.org/61643025/160001

[commit-bot: I haz the power, 2013-11-15 07:14:11]

Retried try job too often on linux_rel for step(s) browser_tests
http://build.chromium.org/p/tryserver.chromium/buildstatus?builder=linux_rel&...

[Steve Block, 2013-11-15 07:19:43]

Bot failures seem to be unrelated flakiness and this is low-risk, so landing
manually.

[Steve Block, 2013-11-15 07:23:39]

Committed patchset #2 manually as r235301 (presubmit successful).