Reinstate early out from antialiased path rendering if we anticipate overflow (or if the path is completely clipped out).
Reinstate early out from antialiased path rendering if we anticipate
overflow (or if the path is completely clipped out).

Fixes http://code.google.com/p/chromium/issues/detail?id=121405
Reviewed at http://codereview.appspot.com/5989070/



git-svn-id: e8541e15acce502a64c929015570ad1648e548cd@3658 2bbb7eff-a529-9590-31e7-b0007b416f81

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