[TTS][Overlay] Fix content width overflowing narrow panel.

[TTS][Overlay] Fix content width overflowing narrow panel.

When the top controls are shown by the Browser, the Overlay Panel gets
many onSizeChanged events while the controls animate off the top. This
can cause the panel content to overflow a narrow panel on tablet.

The panel now ignores the onSizeChanged calls if they have the same
height as previous calls.

BUG=632483
Review-Url: https://codereview.chromium.org/2486003004
Cr-Commit-Position: refs/heads/master@{#431345}
(cherry picked from commit 3f933d51ebdb5027f27e79a9a816857bbdee12ba)

Committed: https://chromium.googlesource.com/chromium/src/+/9892b4fa654f59a436144637f5b71c643d0b2f6a

[Donn Denman, 2016-11-19 01:30:15]

Description was changed from

==========
[TTS][Overlay] Fix content width overflowing narrow panel.

When the top controls are shown by the Browser, the Overlay Panel gets
many onSizeChanged events while the controls animate off the top. This
can cause the panel content to overflow a narrow panel on tablet.

The panel now ignores the onSizeChanged calls if they have the same
height as previous calls.

BUG=632483

Review-Url: https://codereview.chromium.org/2486003004
Cr-Commit-Position: refs/heads/master@{#431345}
(cherry picked from commit 3f933d51ebdb5027f27e79a9a816857bbdee12ba)
==========

to

==========
[TTS][Overlay] Fix content width overflowing narrow panel.

When the top controls are shown by the Browser, the Overlay Panel gets
many onSizeChanged events while the controls animate off the top. This
can cause the panel content to overflow a narrow panel on tablet.

The panel now ignores the onSizeChanged calls if they have the same
height as previous calls.

BUG=632483

Review-Url: https://codereview.chromium.org/2486003004
Cr-Commit-Position: refs/heads/master@{#431345}
(cherry picked from commit 3f933d51ebdb5027f27e79a9a816857bbdee12ba)

Committed:
https://chromium.googlesource.com/chromium/src/+/9892b4fa654f59a436144637f5b7...
==========

[Donn Denman, 2016-11-19 01:30:17]

Committed patchset #1 (id:1) manually as
9892b4fa654f59a436144637f5b71c643d0b2f6a.