[Home] Add more null checks for LayoutManagerChrome

[Home] Add more null checks for LayoutManagerChrome

The LayoutManagerChrome can still be null when #onNewTabPageShown()
is called for the first time.

BUG=699935
Review-Url: https://codereview.chromium.org/2741843003
Cr-Commit-Position: refs/heads/master@{#456137}
Committed: https://chromium.googlesource.com/chromium/src/+/cc3b684f89c787d632a25c6037edbc5ba71c7da6

[Theresa, 2017-03-10 19:14:04]

The CQ bit was checked by twellington@chromium.org to run a CQ dry run

[Theresa, 2017-03-10 19:14:26]

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

[Theresa, 2017-03-10 19:14:26]

ptal

[commit-bot: I haz the power, 2017-03-10 19:14:43]

Dry run: CQ is trying da patch. Follow status at
 
https://chromium-cq-status.appspot.com/v2/patch-status/codereview.chromium.or...

[Ted C, 2017-03-10 19:15:03]

lgtm

[Theresa, 2017-03-10 19:15:15]

The CQ bit was unchecked by twellington@chromium.org

[Theresa, 2017-03-10 19:15:16]

The CQ bit was checked by twellington@chromium.org

[commit-bot: I haz the power, 2017-03-10 19:15:51]

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, 2017-03-10 19:49:19]

CQ is committing da patch.

Bot data: {"patchset_id": 1, "attempt_start_ts": 1489173316043070, "parent_rev":
"6694c0e5e6727606e83542d3d471f3967fdb0128", "commit_rev":
"cc3b684f89c787d632a25c6037edbc5ba71c7da6"}

[commit-bot: I haz the power, 2017-03-10 19:50:01]

Description was changed from

==========
[Home] Add more null checks for LayoutManagerChrome

The LayoutManagerChrome can still be null when #onNewTabPageShown()
is called for the first time.

BUG=699935
==========

to

==========
[Home] Add more null checks for LayoutManagerChrome

The LayoutManagerChrome can still be null when #onNewTabPageShown()
is called for the first time.

BUG=699935

Review-Url: https://codereview.chromium.org/2741843003
Cr-Commit-Position: refs/heads/master@{#456137}
Committed:
https://chromium.googlesource.com/chromium/src/+/cc3b684f89c787d632a25c6037ed...
==========

[commit-bot: I haz the power, 2017-03-10 19:50:04]

Committed patchset #1 (id:1) as
https://chromium.googlesource.com/chromium/src/+/cc3b684f89c787d632a25c6037ed...