Paint invalidation: Need to check offset cacheability for invalidation containers.

Paint invalidation: Need to check offset cacheability for invalidation containers.

A check for supportsPaintInvalidationStateCachedOffsets() was missing for
renderers establishing a paint invalidation container, which incorrectly
made us assume that offsets were always cacheable for paint invalidation
containers.

BUG=438901
R=chrishtr@chromium.org

Committed: https://src.chromium.org/viewvc/blink?view=rev&revision=186938

[chrishtr, 2014-12-10 22:21:18]

The CQ bit was checked by chrishtr@chromium.org

[chrishtr, 2014-12-10 22:21:18]

lgtm

[commit-bot: I haz the power, 2014-12-10 22:21:55]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/772913003/1

[commit-bot: I haz the power, 2014-12-11 01:24:37]

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

[commit-bot: I haz the power, 2014-12-11 01:24:42]

Try jobs failed on following builders:
  mac_blink_rel on tryserver.blink
(http://build.chromium.org/p/tryserver.blink/builders/mac_blink_rel/builds/34733)

[mstensho (USE GERRIT), 2014-12-11 08:48:37]

The CQ bit was checked by mstensho@opera.com

[commit-bot: I haz the power, 2014-12-11 08:49:13]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/772913003/20001

[commit-bot: I haz the power, 2014-12-11 10:53:17]

Committed patchset #2 (id:20001) as
https://src.chromium.org/viewvc/blink?view=rev&revision=186938