Valgrind/Heapcheck: Suppress leak in TranslateBubbleViewTest.

BUG=309468
TBR=jyasskin@chromium.org

Review URL: https://codereview.chromium.org/31133002

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@229703 0039d316-1c4b-4281-b951-d872f2087c98
SVN changes up to revision 229703