Merge 95012 - [chromium] Remove AllowCrossThreadAccess for WorkerFileWriterCallbacksBridge.

Merge 95012 - [chromium] Remove AllowCrossThreadAccess for WorkerFileWriterCallbacksBridge.
https://bugs.webkit.org/show_bug.cgi?id=67943

Reviewed by Adam Barth.

* src/WorkerFileWriterCallbacksBridge.cpp: Removed AllowCrossThreadAccess
allowing the automatic ref counting to work. This was previous needed when
the ref counting wasn't working but that was fixed in r94986. Note that the
design was to have ref counting since the methods take PassRefPtr and the
class is ThreadSafeRefCounted. (Ideally we have noticed this flaw when
adding in AllowCrossThreadAccess.)
(WebKit::WorkerFileWriterCallbacksBridge::postWriteToMainThread):
(WebKit::WorkerFileWriterCallbacksBridge::postTruncateToMainThread):
(WebKit::WorkerFileWriterCallbacksBridge::postAbortToMainThread):
(WebKit::WorkerFileWriterCallbacksBridge::didWrite):
(WebKit::WorkerFileWriterCallbacksBridge::didFail):
(WebKit::WorkerFileWriterCallbacksBridge::didTruncate):
(WebKit::WorkerFileWriterCallbacksBridge::postInitToMainThread):
(WebKit::WorkerFileWriterCallbacksBridge::dispatchTaskToMainThread):
(WebKit::WorkerFileWriterCallbacksBridge::dispatchTaskToWorkerThread):


TBR=levin@chromium.org
Committed: http://src.chromium.org/viewvc/chrome?view=rev&revision=96063