Add an IPC to abort Stream construction.

content/browser/fileapi/fileapi_message_filter.h

 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef CONTENT_BROWSER_FILEAPI_FILEAPI_MESSAGE_FILTER_H_
 #define CONTENT_BROWSER_FILEAPI_FILEAPI_MESSAGE_FILTER_H_
 
 #include <map>
 #include <set>
 #include <string>
@@ skipping 136 matching lines @@
 
   // Currently |content_type| is ignored.
   //
   // TODO(tyoshino): Set |content_type| to the stream.
   void OnStartBuildingStream(const GURL& url, const std::string& content_type);
   void OnAppendBlobDataItemToStream(
       const GURL& url, const webkit_blob::BlobData::Item& item);
   void OnAppendSharedMemoryToStream(
       const GURL& url, base::SharedMemoryHandle handle, size_t buffer_size);
   void OnFinishBuildingStream(const GURL& url);
+  void OnAbortBuildingStream(const GURL& url);
   void OnCloneStream(const GURL& url, const GURL& src_url);
   void OnRemoveStream(const GURL& url);
 
   // Callback functions to be used when each file operation is finished.
   void DidFinish(int request_id, base::PlatformFileError result);
   void DidCancel(int request_id, base::PlatformFileError result);
   void DidGetMetadata(int request_id,
                       base::PlatformFileError result,
                       const base::PlatformFileInfo& info);
   void DidReadDirectory(int request_id,
@@ skipping 74 matching lines @@
   // Need to close all of them when the renderer process dies.
   typedef IDMap<base::Closure, IDMapOwnPointer> OnCloseCallbackMap;
   OnCloseCallbackMap on_close_callbacks_;
 
   DISALLOW_COPY_AND_ASSIGN(FileAPIMessageFilter);
 };
 
 }  // namespace content
 
 #endif  // CONTENT_BROWSER_FILEAPI_FILEAPI_MESSAGE_FILTER_H_