Quick fix for chrome crashing

Removed assertion for null contextMenuDialog before setting
topCOntentOffsetY which was crashing chrome.

BUG=738483
Review-Url: https://codereview.chromium.org/2965683003
Cr-Commit-Position: refs/heads/master@{#483780}
Committed: https://chromium.googlesource.com/chromium/src/+/3e730f1fe2d273860e207ee481d4279b531ab0d7

[Daniel Park, 2017-06-30 16:59:23]

danielpark@chromium.org changed reviewers:
+ danielpark@chromium.org, dfalcantara@chromium.org

[Daniel Park, 2017-06-30 16:59:44]

Description was changed from

==========
Removed assertion for null contextMenuDialog before setting
topCOntentOffsetY which was crashing chrome.

BUG=738483
==========

to

==========
Removed assertion for null contextMenuDialog before setting
topCOntentOffsetY which was crashing chrome.

BUG=738483
==========

[gone, 2017-06-30 17:53:49]

lgtm

[Daniel Park, 2017-06-30 17:54:13]

The CQ bit was checked by danielpark@chromium.org

[Daniel Park, 2017-06-30 17:54:15]

The CQ bit was unchecked by danielpark@chromium.org

[Daniel Park, 2017-06-30 17:54:24]

danielpark@chromium.org changed reviewers:
+ tedchoc@chromium.org

[Ted C, 2017-06-30 17:54:50]

lgtm

[Daniel Park, 2017-06-30 17:57:18]

The CQ bit was checked by danielpark@chromium.org

[commit-bot: I haz the power, 2017-06-30 17:57:34]

CQ is trying da patch.

Follow status at:
https://chromium-cq-status.appspot.com/v2/patch-status/codereview.chromium.or...

[commit-bot: I haz the power, 2017-06-30 18:56:58]

CQ is committing da patch.

Bot data: {"patchset_id": 1, "attempt_start_ts": 1498845438825340, "parent_rev":
"51748c71e51e538a7dd2f1ec60a7c98cc02acdd0", "commit_rev":
"3e730f1fe2d273860e207ee481d4279b531ab0d7"}

[commit-bot: I haz the power, 2017-06-30 18:57:11]

Description was changed from

==========
Removed assertion for null contextMenuDialog before setting
topCOntentOffsetY which was crashing chrome.

BUG=738483
==========

to

==========
Removed assertion for null contextMenuDialog before setting
topCOntentOffsetY which was crashing chrome.

BUG=738483

Review-Url: https://codereview.chromium.org/2965683003
Cr-Commit-Position: refs/heads/master@{#483780}
Committed:
https://chromium.googlesource.com/chromium/src/+/3e730f1fe2d273860e207ee481d4...
==========

[commit-bot: I haz the power, 2017-06-30 18:57:15]

Committed patchset #1 (id:1) as
https://chromium.googlesource.com/chromium/src/+/3e730f1fe2d273860e207ee481d4...