[WebSocket] bufferedAmount should not decrease inside a task.

Source/modules/websockets/MainThreadWebSocketChannel.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 337 matching lines @@
     if (m_shouldDiscardReceivedData)
         return;
     if (!appendToBuffer(data, len)) {
         m_shouldDiscardReceivedData = true;
         failAsError("Ran out of memory while receiving WebSocket data.");
         return;
     }
     processBuffer();
 }
 
-void MainThreadWebSocketChannel::didUpdateBufferedAmount(SocketStreamHandle*, size_t bufferedAmount)
+void MainThreadWebSocketChannel::didIncreaseBufferedAmount(SocketStreamHandle*, size_t amount)
 {
     if (m_client)
-        m_client->didUpdateBufferedAmount(bufferedAmount);
+        m_client->didIncreaseBufferedAmount(amount);
+}
+
+void MainThreadWebSocketChannel::didDecreaseBufferedAmount(SocketStreamHandle*, size_t amount)
+{
+    if (m_client)
+        m_client->didDecreaseBufferedAmount(amount);
 }
 
 void MainThreadWebSocketChannel::didFailSocketStream(SocketStreamHandle* handle, const SocketStreamError& error)
 {
     WTF_LOG(Network, "MainThreadWebSocketChannel %p didFailSocketStream()", this);
     ASSERT_UNUSED(handle, handle == m_handle || !m_handle);
     m_shouldDiscardReceivedData = true;
     String message;
     if (error.isNull())
         message = "WebSocket network error";
@@ skipping 492 matching lines @@
     }
 
     Vector<char> frameData;
     frame.makeFrameData(frameData);
 
     m_perMessageDeflate.resetDeflateBuffer();
     return m_handle->send(frameData.data(), frameData.size());
 }
 
 } // namespace WebCore