[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..6ab768de88ebff489e8150d47b6b469b17f59f7f 100644
--- a/public/web/WebSocketClient.h
+++ b/public/web/WebSocketClient.h
@@ -50,7 +50,8 @@ public:
     virtual void didReceiveMessage(const WebString& message) { }
     virtual void didReceiveArrayBuffer(const WebArrayBuffer& arrayBuffer) { }
     virtual void didReceiveMessageError() { }
-    virtual void didUpdateBufferedAmount(unsigned long bufferedAmount) { }
+    virtual void didIncreaseBufferedAmount(unsigned long amount) { }
+    virtual void didDecreaseBufferedAmount(unsigned long amount) { }
     virtual void didStartClosingHandshake() { }
     virtual void didClose(unsigned long bufferedAmount, ClosingHandshakeCompletionStatus, unsigned short code, const WebString& reason) { }
 };