DOMWebSocket::bufferedAmount() should not return an "unsigned long"

Source/modules/websockets/DocumentWebSocketChannel.cpp

 /*
  * Copyright (C) 2013 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 285 matching lines @@
     , vectorData(vectorData) { }
 
 DocumentWebSocketChannel::Message::Message(unsigned short code, const String& reason)
     : type(MessageTypeClose)
     , code(code)
     , reason(reason) { }
 
 void DocumentWebSocketChannel::sendInternal()
 {
     ASSERT(m_handle);
-    unsigned long consumedBufferedAmount = 0;
+    unsigned consumedBufferedAmount = 0;
     while (!m_messages.isEmpty() && !m_blobLoader) {
         bool final = false;
         Message* message = m_messages.first().get();
         if (m_sendingQuota <= 0 && message->type != MessageTypeClose)
             break;
         switch (message->type) {
         case MessageTypeText: {
             WebSocketHandle::MessageType type =
                 m_sentSizeOfTopMessage ? WebSocketHandle::MessageTypeContinuation : WebSocketHandle::MessageTypeText;
             size_t size = std::min(static_cast<size_t>(m_sendingQuota), message->text.length() - m_sentSizeOfTopMessage);
@@ skipping 268 matching lines @@
 }
 
 void DocumentWebSocketChannel::trace(Visitor* visitor)
 {
     visitor->trace(m_blobLoader);
     visitor->trace(m_client);
     WebSocketChannel::trace(visitor);
 }
 
 } // namespace blink