R=estade@chromium.org,csilv@chromium.org
BUG=92912
TEST=Drag a [removable] app over the trash in either LTR or RTL and be greeted
by a sweet trash can lid opening animation.

Committed: http://src.chromium.org/viewvc/chrome?view=rev&revision=113167

Review URL: http://codereview.chromium.org/8786010

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@113292 0039d316-1c4b-4281-b951-d872f2087c98