[WebSocket] bufferedAmount should not decrease inside a task.

public/web/WebSocketClient.h

Index: public/web/WebSocketClient.h
diff --git a/public/web/WebSocketClient.h b/public/web/WebSocketClient.h
index 35896f82b0b9dfa8d66d74a9abdee8b24e19bf52..666a018cd370e48f8aed0e9dd8b44b7a28b32af4 100644
--- a/public/web/WebSocketClient.h
+++ b/public/web/WebSocketClient.h
@@ -46,13 +46,18 @@ public:
     };
 
     virtual ~WebSocketClient() { }
-    virtual void didConnect() { }
+    virtual void didConnect(const WebString& subprotocol, const WebString& extensions) { }
     virtual void didReceiveMessage(const WebString& message) { }
     virtual void didReceiveArrayBuffer(const WebArrayBuffer& arrayBuffer) { }
     virtual void didReceiveMessageError() { }
-    virtual void didUpdateBufferedAmount(unsigned long bufferedAmount) { }
+    virtual void didConsumeBufferedAmount(unsigned long consumed) { }
     virtual void didStartClosingHandshake() { }
-    virtual void didClose(unsigned long bufferedAmount, ClosingHandshakeCompletionStatus, unsigned short code, const WebString& reason) { }
+    virtual void didClose(ClosingHandshakeCompletionStatus, unsigned short code, const WebString& reason) { }
+
+    // FIXME: Deperecate these methods.
+    virtual void didConnect() { }
+    virtual void didUpdateBufferedAmount(unsigned long bufferedAmount) { }
+    virtual void didClose(unsigned long unhandledBufferedAmount, ClosingHandshakeCompletionStatus, unsigned short code, const WebString& reason) { }
 };
 
 } // namespace blink