[WebSocket] bufferedAmount should not decrease inside a task.

Source/web/WebSocketImpl.cpp

 /*
  * Copyright (C) 2011, 2012 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 133 matching lines @@
         m_client->didReceiveArrayBuffer(WebArrayBuffer(ArrayBuffer::create(binaryData->data(), binaryData->size())));
         break;
     }
 }
 
 void WebSocketImpl::didReceiveMessageError()
 {
     m_client->didReceiveMessageError();
 }
 
-void WebSocketImpl::didUpdateBufferedAmount(unsigned long bufferedAmount)
+void WebSocketImpl::didIncreaseBufferedAmount(unsigned long amount)
 {
-    m_client->didUpdateBufferedAmount(bufferedAmount);
+    m_client->didIncreaseBufferedAmount(amount);
+}
+
+void WebSocketImpl::didDecreaseBufferedAmount(unsigned long amount)
+{
+    m_client->didDecreaseBufferedAmount(amount);
 }
 
 void WebSocketImpl::didStartClosingHandshake()
 {
     m_client->didStartClosingHandshake();
 }
 
 void WebSocketImpl::didClose(unsigned long bufferedAmount, ClosingHandshakeCompletionStatus status, unsigned short code, const String& reason)
 {
     m_client->didClose(bufferedAmount, static_cast<WebSocketClient::ClosingHandshakeCompletionStatus>(status), code, WebString(reason));
 }
 
 } // namespace blink