Use downloadToFile option when XHR downloads a Blob

Source/core/loader/WorkerThreadableLoader.cpp

 /*
  * Copyright (C) 2009, 2010 Google Inc. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions are
  * met:
  *
  *     * Redistributions of source code must retain the above copyright
  * notice, this list of conditions and the following disclaimer.
  *     * Redistributions in binary form must reproduce the above
@@ skipping 183 matching lines @@
     workerClientWrapper->didReceiveData(vectorData->data(), vectorData->size());
 }
 
 void WorkerThreadableLoader::MainThreadBridge::didReceiveData(const char* data, int dataLength)
 {
     OwnPtr<Vector<char> > vector = adoptPtr(new Vector<char>(dataLength)); // needs to be an OwnPtr for usage with createCallbackTask.
     memcpy(vector->data(), data, dataLength);
     m_loaderProxy.postTaskForModeToWorkerGlobalScope(createCallbackTask(&workerGlobalScopeDidReceiveData, m_workerClientWrapper, vector.release()), m_taskMode);
 }
 
+static void workerGlobalScopeDidDownloadData(ScriptExecutionContext* context, PassRefPtr<ThreadableLoaderClientWrapper> workerClientWrapper, int dataLength)
+{
+    ASSERT_UNUSED(context, context->isWorkerGlobalScope());
+    workerClientWrapper->didDownloadData(dataLength);
+}
+
+void WorkerThreadableLoader::MainThreadBridge::didDownloadData(int dataLength)
+{
+    m_loaderProxy.postTaskForModeToWorkerGlobalScope(createCallbackTask(&workerGlobalScopeDidDownloadData, m_workerClientWrapper, dataLength), m_taskMode);
+}
+
 static void workerGlobalScopeDidReceiveCachedMetadata(ScriptExecutionContext* context, RefPtr<ThreadableLoaderClientWrapper> workerClientWrapper, PassOwnPtr<Vector<char> > vectorData)
 {
     ASSERT_UNUSED(context, context->isWorkerGlobalScope());
     workerClientWrapper->didReceiveCachedMetadata(vectorData->data(), vectorData->size());
 }
 
 void WorkerThreadableLoader::MainThreadBridge::didReceiveCachedMetadata(const char* data, int dataLength)
 {
     OwnPtr<Vector<char> > vector = adoptPtr(new Vector<char>(dataLength)); // needs to be an OwnPtr for usage with createCallbackTask.
     memcpy(vector->data(), data, dataLength);
@@ skipping 38 matching lines @@
     ASSERT_UNUSED(context, context->isWorkerGlobalScope());
     workerClientWrapper->didFailRedirectCheck();
 }
 
 void WorkerThreadableLoader::MainThreadBridge::didFailRedirectCheck()
 {
     m_loaderProxy.postTaskForModeToWorkerGlobalScope(createCallbackTask(&workerGlobalScopeDidFailRedirectCheck, m_workerClientWrapper), m_taskMode);
 }
 
 } // namespace WebCore