Adding debug leak guard to Canvas2DLayerBridge
Adding debug leak guard to Canvas2DLayerBridge

R=senorblanco@chromium.org

Review URL: https://codereview.chromium.org/172893002

git-svn-id: bf5cd6ccde378db821296732a091cfbcf5285fbd@167436 bbb929c8-8fbe-4397-9dbb-9b2b20218538

primiano/blink-gitcs,primiano/blink-gitcs,primiano/blink-gitcs,primiano/blink-gitcs,primiano/blink-gitcs,primiano/blink-gitcs,primiano/blink-gitcs,primiano/blink-gitcs,primiano/blink-gitcs