2D canvas: Changing exceptions thrown by drawImage to reflect changes to spec

Cases where source rect or source image have 0 size should fail silently

BUG=309020
R=senorblanco@chromium.org, senorblanco

Review URL: https://codereview.chromium.org/138133017

git-svn-id: svn://svn.chromium.org/blink/trunk@166532 bbb929c8-8fbe-4397-9dbb-9b2b20218538