Update bug URL for focus-by-mouse tests.

BUG=254332
TBR=keishi@chromium.org

Review URL: https://codereview.chromium.org/17822003

git-svn-id: svn://svn.chromium.org/blink/trunk@153048 bbb929c8-8fbe-4397-9dbb-9b2b20218538
The color depth can be 32bits now that we use content shell

BUG=243592
R=eseidel@chromium.org

Review URL: https://codereview.chromium.org/17248002

git-svn-id: svn://svn.chromium.org/blink/trunk@153049 bbb929c8-8fbe-4397-9dbb-9b2b20218538
Remove more ScopedPersistent::get usages.

It will be removed.

BUG=236290

Review URL: https://chromiumcodereview.appspot.com/17620009

git-svn-id: svn://svn.chromium.org/blink/trunk@153050 bbb929c8-8fbe-4397-9dbb-9b2b20218538