OOPIF: Fix blinking caret in input fields.

OOPIF: Fix blinking caret in input fields.

Currently, a focused input text field in a cross-process subframe
doesn't have a blinking caret as expected.  The root cause of this is
that FrameSelection::scheduleVisualUpdate wasn't working correctly for
frames with WebFrameWidgets.  This CL fixes that by passing in the
local frame root to page->animator().scheduleVisualUpdate().

BUG=530663
TEST=Click on <input> text field in an OOP frame, observe blinking caret.

Committed: https://crrev.com/8e83910cb9f853ecb8ad781fc274cc9b0f615aa7
Cr-Commit-Position: refs/heads/master@{#357016}

[alexmos, 2015-10-26 23:24:22]

alexmos@chromium.org changed reviewers:
+ kenrb@chromium.org

[alexmos, 2015-10-26 23:24:22]

Hi Ken, can you please take a look?  This one's very short.

[kenrb, 2015-10-27 17:22:57]

nice, lgtm

[alexmos, 2015-10-27 20:57:19]

alexmos@chromium.org changed reviewers:
+ dcheng@chromium.org

[alexmos, 2015-10-27 20:57:20]

+Daniel for OWNERS.

[dcheng, 2015-10-27 20:57:39]

lgtm

[alexmos, 2015-10-30 00:35:53]

The CQ bit was checked by alexmos@chromium.org

[commit-bot: I haz the power, 2015-10-30 00:36:14]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1405373004/1
View timeline at
 https://chromium-cq-status.appspot.com/patch-timeline/1405373004/1

[commit-bot: I haz the power, 2015-10-30 00:46:10]

The CQ bit was unchecked by commit-bot@chromium.org

[commit-bot: I haz the power, 2015-10-30 00:46:11]

Try jobs failed on following builders:
  chromium_presubmit on tryserver.chromium.linux (JOB_FAILED,
http://build.chromium.org/p/tryserver.chromium.linux/builders/chromium_presub...)

[alexmos, 2015-10-30 01:44:44]

The CQ bit was checked by alexmos@chromium.org

[commit-bot: I haz the power, 2015-10-30 01:45:04]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1405373004/1
View timeline at
 https://chromium-cq-status.appspot.com/patch-timeline/1405373004/1

[commit-bot: I haz the power, 2015-10-30 01:50:23]

Committed patchset #1 (id:1)

[commit-bot: I haz the power, 2015-10-30 01:51:06]

Patchset 1 (id:??) landed as
https://crrev.com/8e83910cb9f853ecb8ad781fc274cc9b0f615aa7
Cr-Commit-Position: refs/heads/master@{#357016}