cc: Avoid Crash in Effect Tree Animation by Element ID

cc: Avoid Crash in Effect Tree Animation by Element ID

Instead of crash, early out of function trying to animate on effect
tree by element id.

The root cause of this crash is we are trying to animate a node that
does not have element id set up in map yet. Before the bug was covered
by operator[] used for access map, and that would ends up being a noop.

R=wkorman
BUG=706766, 707090, 702774
CQ_INCLUDE_TRYBOTS=master.tryserver.blink:linux_trusty_blink_rel

Review-Url: https://codereview.chromium.org/2794673002
Cr-Commit-Position: refs/heads/master@{#461432}
(cherry picked from commit 9975ad63f85f1fe76100602db98800b9232aa454)

Review-Url: https://codereview.chromium.org/2792143002 .
Cr-Commit-Position: refs/branch-heads/3061@{#3}
Cr-Branched-From: 9e03960f75b3019372157db5c4fe5264dfc36616-refs/heads/master@{#461353}
Committed: https://chromium.googlesource.com/chromium/src/+/9a3acfa5090cb502ba1af13609446a6b9a052dad

[weiliangc, 2017-04-03 20:18:39]

Description was changed from

==========
cc: Avoid Crash in Effect Tree Animation by Element ID

Instead of crash, early out of function trying to animate on effect
tree by element id.

The root cause of this crash is we are trying to animate a node that
does not have element id set up in map yet. Before the bug was covered
by operator[] used for access map, and that would ends up being a noop.

R=wkorman
BUG=706766, 707090, 702774
CQ_INCLUDE_TRYBOTS=master.tryserver.blink:linux_trusty_blink_rel

Review-Url: https://codereview.chromium.org/2794673002
Cr-Commit-Position: refs/heads/master@{#461432}
(cherry picked from commit 9975ad63f85f1fe76100602db98800b9232aa454)
==========

to

==========
cc: Avoid Crash in Effect Tree Animation by Element ID

Instead of crash, early out of function trying to animate on effect
tree by element id.

The root cause of this crash is we are trying to animate a node that
does not have element id set up in map yet. Before the bug was covered
by operator[] used for access map, and that would ends up being a noop.

R=wkorman
BUG=706766, 707090, 702774
CQ_INCLUDE_TRYBOTS=master.tryserver.blink:linux_trusty_blink_rel

Review-Url: https://codereview.chromium.org/2794673002
Cr-Commit-Position: refs/heads/master@{#461432}
(cherry picked from commit 9975ad63f85f1fe76100602db98800b9232aa454)

Review-Url: https://codereview.chromium.org/2792143002 .
Cr-Commit-Position: refs/branch-heads/3061@{#3}
Cr-Branched-From:
9e03960f75b3019372157db5c4fe5264dfc36616-refs/heads/master@{#461353}
Committed:
https://chromium.googlesource.com/chromium/src/+/9a3acfa5090cb502ba1af1360944...
==========

[weiliangc, 2017-04-03 20:18:40]

Committed patchset #1 (id:1) manually as
9a3acfa5090cb502ba1af13609446a6b9a052dad.