Remove null-check for page.

Remove null-check for page.

I don't see how we could have a null page here. I put an
assert(page) in CompositingReasonFinder::updateTriggers to
verify that no tests hit this.

Committed: https://src.chromium.org/viewvc/blink?view=rev&revision=171361

[eseidel, 2014-04-10 21:48:36]

lgtm

We shouldn't ever be compositing w/o a page.

[commit-bot: I haz the power, 2014-04-10 21:48:42]

CQ is trying da patch. Follow status at
https://chromium-status.appspot.com/cq/ojan@chromium.org/233963002/1

[commit-bot: I haz the power, 2014-04-10 23:01:43]

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

[commit-bot: I haz the power, 2014-04-10 23:01:47]

Try jobs failed on following builders:
  tryserver.blink on linux_blink_dbg

[ojan, 2014-04-10 23:03:26]

The CQ bit was checked by ojan@chromium.org

[commit-bot: I haz the power, 2014-04-10 23:03:36]

CQ is trying da patch. Follow status at
https://chromium-status.appspot.com/cq/ojan@chromium.org/233963002/1

[commit-bot: I haz the power, 2014-04-10 23:05:30]

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

[commit-bot: I haz the power, 2014-04-10 23:05:31]

Try jobs failed on following builders:
  tryserver.blink on linux_blink_dbg

[ojan, 2014-04-11 16:58:16]

The CQ bit was checked by ojan@chromium.org

[commit-bot: I haz the power, 2014-04-11 16:58:19]

CQ is trying da patch. Follow status at
https://chromium-status.appspot.com/cq/ojan@chromium.org/233963002/1

[commit-bot: I haz the power, 2014-04-11 18:08:54]

Change committed as 171361