[WebSocket] bufferedAmount should not decrease inside a task.

Source/web/WebSocketImpl.h

Index: Source/web/WebSocketImpl.h
diff --git a/Source/web/WebSocketImpl.h b/Source/web/WebSocketImpl.h
index 3165e02700d693282cd0754c8c70538f6d64b5d2..0911445922c6f46a7b70292ab045eb2737026245 100644
--- a/Source/web/WebSocketImpl.h
+++ b/Source/web/WebSocketImpl.h
@@ -71,14 +71,15 @@ public:
     virtual void didReceiveMessage(const String& message) OVERRIDE;
     virtual void didReceiveBinaryData(PassOwnPtr<Vector<char> > binaryData) OVERRIDE;
     virtual void didReceiveMessageError() OVERRIDE;
-    virtual void didUpdateBufferedAmount(unsigned long bufferedAmount) OVERRIDE;
+    virtual void didConsumeBufferedAmount(unsigned long consumed) OVERRIDE;
     virtual void didStartClosingHandshake() OVERRIDE;
-    virtual void didClose(unsigned long bufferedAmount, ClosingHandshakeCompletionStatus, unsigned short code, const String& reason) OVERRIDE;
+    virtual void didClose(ClosingHandshakeCompletionStatus, unsigned short code, const String& reason) OVERRIDE;
 
 private:
     RefPtrWillBePersistent<WebCore::WebSocketChannel> m_private;
     WebSocketClient* m_client;
     BinaryType m_binaryType;
+    unsigned long m_bufferedAmount;
 };
 
 } // namespace blink