Fix ASSERT(m_checkedCachedDrawing) called by WebFontImpl

Fix ASSERT(m_checkedCachedDrawing) called by WebFontImpl

BUG=497950
Committed: https://src.chromium.org/viewvc/blink?view=rev&revision=196789

[Xianzhu, 2015-06-09 05:12:22]

wangxianzhu@chromium.org changed reviewers:
+ chrishtr@chromium.org, wkorman@chromium.org

[wkorman, 2015-06-09 05:17:22]

The CQ bit was checked by wkorman@chromium.org

[wkorman, 2015-06-09 05:17:23]

lgtm

[commit-bot: I haz the power, 2015-06-09 05:17:30]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1169053002/1

[commit-bot: I haz the power, 2015-06-09 05:22:59]

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

[commit-bot: I haz the power, 2015-06-09 05:23:00]

Try jobs failed on following builders:
  blink_presubmit on tryserver.blink (JOB_FAILED,
http://build.chromium.org/p/tryserver.blink/builders/blink_presubmit/builds/3...)

[Xianzhu, 2015-06-09 17:48:52]

chrishtr@ this CL needs your approval.

[chrishtr, 2015-06-09 18:13:42]

The CQ bit was checked by chrishtr@chromium.org

[chrishtr, 2015-06-09 18:13:43]

lgtm

[commit-bot: I haz the power, 2015-06-09 18:13:54]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1169053002/1

[commit-bot: I haz the power, 2015-06-09 18:17:11]

Committed patchset #1 (id:1) as
https://src.chromium.org/viewvc/blink?view=rev&revision=196789