Merge "arc: Fix CreateFloatingCloseButton crash"

Merge "arc: Fix CreateFloatingCloseButton crash"

> Move UpdatePinnedState into AttachSurface since floating close button
> participates in the focus chain of the hosting widget now. To create it,
> both |surface_| and the hosting widget needs to be present.
>
> BUG=682868
>
> Review-Url: https://codereview.chromium.org/2646143002
> Cr-Commit-Position: refs/heads/master@{#445754}
> (cherry picked from commit 57d39edccd4352d933347b9742010740cef62ce5)

Review-Url: https://codereview.chromium.org/2649133009 .
Cr-Commit-Position: refs/branch-heads/2987@{#61}
Cr-Branched-From: ad51088c0e8776e8dcd963dbe752c4035ba6dab6-refs/heads/master@{#444943}
Committed: https://chromium.googlesource.com/chromium/src/+/1b0254b78a3cd0d23233bb02ba0f39d0bd3f99b3

[xiyuan, 2017-01-24 18:12:52]

Description was changed from

==========
Merge "arc: Fix CreateFloatingCloseButton crash"

> Move UpdatePinnedState into AttachSurface since floating close button
> participates in the focus chain of the hosting widget now. To create it,
> both |surface_| and the hosting widget needs to be present.
>
> BUG=682868
>
> Review-Url: https://codereview.chromium.org/2646143002
> Cr-Commit-Position: refs/heads/master@{#445754}
> (cherry picked from commit 57d39edccd4352d933347b9742010740cef62ce5)
==========

to

==========
Merge "arc: Fix CreateFloatingCloseButton crash"

> Move UpdatePinnedState into AttachSurface since floating close button
> participates in the focus chain of the hosting widget now. To create it,
> both |surface_| and the hosting widget needs to be present.
>
> BUG=682868
>
> Review-Url: https://codereview.chromium.org/2646143002
> Cr-Commit-Position: refs/heads/master@{#445754}
> (cherry picked from commit 57d39edccd4352d933347b9742010740cef62ce5)

Review-Url: https://codereview.chromium.org/2649133009 .
Cr-Commit-Position: refs/branch-heads/2987@{#61}
Cr-Branched-From:
ad51088c0e8776e8dcd963dbe752c4035ba6dab6-refs/heads/master@{#444943}
Committed:
https://chromium.googlesource.com/chromium/src/+/1b0254b78a3cd0d23233bb02ba0f...
==========

[xiyuan, 2017-01-24 18:12:53]

Committed patchset #1 (id:1) manually as
1b0254b78a3cd0d23233bb02ba0f39d0bd3f99b3.