Skip CRWGenericContentView layout if the bounds size hasn't changed.

Skip CRWGenericContentView layout if the bounds size hasn't changed.

This fixes the bug where overscroll actions that update the scroll view
content inset trigger a relayout of the contained view.

BUG=none

Committed: https://crrev.com/5e0bda2bd8c278ecd890720a0600c6ecbcd4c35d
Cr-Commit-Position: refs/heads/master@{#348795}

[kkhorimoto, 2015-09-15 00:37:18]

kkhorimoto@chromium.org changed reviewers:
+ eugenebut@chromium.org, stuartmorgan@chromium.org

[kkhorimoto, 2015-09-15 00:37:19]

This fixes a bug in SadTab layout.

[Eugene But (OOO till 7-30), 2015-09-15 00:45:43]

lgtm

[kkhorimoto, 2015-09-15 00:50:06]

The CQ bit was checked by kkhorimoto@chromium.org

[commit-bot: I haz the power, 2015-09-15 00:50:14]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1342023002/1
View timeline at
 https://chromium-cq-status.appspot.com/patch-timeline/1342023002/1

[commit-bot: I haz the power, 2015-09-15 01:00:29]

Committed patchset #1 (id:1)

[commit-bot: I haz the power, 2015-09-15 01:01:05]

Patchset 1 (id:??) landed as
https://crrev.com/5e0bda2bd8c278ecd890720a0600c6ecbcd4c35d
Cr-Commit-Position: refs/heads/master@{#348795}

[commit-bot: I haz the power, 2015-09-23 12:40:31]

Patchset 1 (id:??) landed as
https://crrev.com/5e0bda2bd8c278ecd890720a0600c6ecbcd4c35d
Cr-Commit-Position: refs/heads/master@{#348795}