Fix gtk theme regression introduced in 477aca494328f

Fix gtk theme regression introduced in 477aca494328f

Turns out we do need to explicitly clear the border images. This bug is
visible when you hover a toolbar button.

BUG=682940
Review-Url: https://codereview.chromium.org/2639423005
Cr-Commit-Position: refs/heads/master@{#445130}
Committed: https://chromium.googlesource.com/chromium/src/+/7e2b5c14fa70447b692fab4f7a9660729cf55b38

[Evan Stade, 2017-01-20 01:52:51]

estade@chromium.org changed reviewers:
+ erg@chromium.org

[Evan Stade, 2017-01-20 01:52:55]

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

[commit-bot: I haz the power, 2017-01-20 01:53:56]

Dry run: 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, 2017-01-20 03:16:47]

The CQ bit was unchecked by commit-bot@chromium.org

[commit-bot: I haz the power, 2017-01-20 03:16:47]

Dry run: This issue passed the CQ dry run.

[Elliot Glaysher, 2017-01-20 18:09:24]

lgtm

[Evan Stade, 2017-01-20 19:27:39]

The CQ bit was checked by estade@chromium.org

[commit-bot: I haz the power, 2017-01-20 19:28:03]

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, 2017-01-20 19:33:54]

CQ is committing da patch.

Bot data: {"patchset_id": 1, "attempt_start_ts": 1484940459089740, "parent_rev":
"5cf6d9ad6f99080af228dfd5b0a182c5bb48874a", "commit_rev":
"7e2b5c14fa70447b692fab4f7a9660729cf55b38"}

[commit-bot: I haz the power, 2017-01-20 19:34:44]

Description was changed from

==========
Fix gtk theme regression introduced in 477aca494328f

Turns out we do need to explicitly clear the border images. This bug is
visible when you hover a toolbar button.

BUG=682940
==========

to

==========
Fix gtk theme regression introduced in 477aca494328f

Turns out we do need to explicitly clear the border images. This bug is
visible when you hover a toolbar button.

BUG=682940

Review-Url: https://codereview.chromium.org/2639423005
Cr-Commit-Position: refs/heads/master@{#445130}
Committed:
https://chromium.googlesource.com/chromium/src/+/7e2b5c14fa70447b692fab4f7a96...
==========

[commit-bot: I haz the power, 2017-01-20 19:34:45]

Committed patchset #1 (id:1) as
https://chromium.googlesource.com/chromium/src/+/7e2b5c14fa70447b692fab4f7a96...