[Merge to M52] [Retry] Fix the browser crash when changing wallpaper with chrome.wallpaper API.

[Merge to M52] [Retry] Fix the browser crash when changing wallpaper with chrome.wallpaper API.

The original CL https://codereview.chromium.org/1986583002/ was reverted in
https://codereview.chromium.org/1984953005/ because of memory leak detected in
the test function getThumbnailAferSetWallpaper().

BUG=608895
TBR=bshe@chromium.org

Review-Url: https://codereview.chromium.org/1989653002
Cr-Commit-Position: refs/heads/master@{#396411}
(cherry picked from commit fffb22c1b808e247ce67cb35793b57ddb35bf1d0)

Committed: https://chromium.googlesource.com/chromium/src/+/59e1abe6af3205eea84d0bb6fb3890ca051e6b1d

[xdai1, 2016-06-10 16:09:22]

Description was changed from

==========
[Merge to M52] [Retry] Fix the browser crash when changing wallpaper with
chrome.wallpaper API.

The original CL https://codereview.chromium.org/1986583002/ was reverted in
https://codereview.chromium.org/1984953005/ because of memory leak detected in
the test function getThumbnailAferSetWallpaper().

BUG=608895
TBR=bshe@chromium.org

Review-Url: https://codereview.chromium.org/1989653002
Cr-Commit-Position: refs/heads/master@{#396411}
(cherry picked from commit fffb22c1b808e247ce67cb35793b57ddb35bf1d0)
==========

to

==========
[Merge to M52] [Retry] Fix the browser crash when changing wallpaper with
chrome.wallpaper API.

The original CL https://codereview.chromium.org/1986583002/ was reverted in
https://codereview.chromium.org/1984953005/ because of memory leak detected in
the test function getThumbnailAferSetWallpaper().

BUG=608895
TBR=bshe@chromium.org

Review-Url: https://codereview.chromium.org/1989653002
Cr-Commit-Position: refs/heads/master@{#396411}
(cherry picked from commit fffb22c1b808e247ce67cb35793b57ddb35bf1d0)

Committed:
https://chromium.googlesource.com/chromium/src/+/59e1abe6af3205eea84d0bb6fb38...
==========

[xdai1, 2016-06-10 16:09:23]

Committed patchset #1 (id:1) manually as
59e1abe6af3205eea84d0bb6fb3890ca051e6b1d (presubmit successful).