Compositor Animations: Do not create compositor animation timeline for remote frames

Compositor Animations: Do not create compositor animation timeline for remote frames

We create ScrollingCoordinator for pages with non-local frames, but it's noop in functionality because of guards:

if (!m_page->mainFrame()->isLocalFrame())
  return;

Let's align the behavior with the rest of ScrollingCoordinator code. Otherwise it crashes browser tests.

BUG=394777
Committed: https://src.chromium.org/viewvc/blink?view=rev&revision=201945

[loyso (OOO), 2015-09-08 07:08:36]

loyso@chromium.org changed reviewers:
+ vollick@chromium.org

[Ian Vollick, 2015-09-09 00:40:36]

The CQ bit was checked by vollick@chromium.org

[Ian Vollick, 2015-09-09 00:40:36]

lgtm

[commit-bot: I haz the power, 2015-09-09 00:40:46]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1304213003/1
View timeline at
 https://chromium-cq-status.appspot.com/patch-timeline/1304213003/1

[commit-bot: I haz the power, 2015-09-09 02:00:30]

Committed patchset #1 (id:1) as
https://src.chromium.org/viewvc/blink?view=rev&revision=201945