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

Source/modules/websockets/DocumentWebSocketChannelTest.cpp

 // Copyright 2014 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "config.h"
 #include "modules/websockets/WebSocketChannel.h"
 
 #include "core/dom/Document.h"
 #include "core/fileapi/Blob.h"
 #include "core/frame/ConsoleTypes.h"
@@ skipping 41 matching lines @@
     virtual ~MockWebSocketChannelClient() { }
 
     MOCK_METHOD2(didConnect, void(const String&, const String&));
     MOCK_METHOD1(didReceiveTextMessage, void(const String&));
     virtual void didReceiveBinaryMessage(PassOwnPtr<Vector<char> > payload) override
     {
         didReceiveBinaryMessageMock(*payload);
     }
     MOCK_METHOD1(didReceiveBinaryMessageMock, void(const Vector<char>&));
     MOCK_METHOD0(didError, void());
-    MOCK_METHOD1(didConsumeBufferedAmount, void(unsigned long));
+    MOCK_METHOD1(didConsumeBufferedAmount, void(unsigned));
     MOCK_METHOD0(didStartClosingHandshake, void());
     MOCK_METHOD3(didClose, void(ClosingHandshakeCompletionStatus, unsigned short, const String&));
 
     virtual void trace(Visitor* visitor) override
     {
         WebSocketChannelClient::trace(visitor);
     }
 
 };
 
@@ skipping 658 matching lines @@
         EXPECT_CALL(*channelClient(), didError());
         EXPECT_CALL(*channelClient(), didClose(WebSocketChannelClient::ClosingHandshakeIncomplete, WebSocketChannel::CloseEventCodeAbnormalClosure, String()));
     }
 
     channel()->fail("fail message from WebSocket", ErrorMessageLevel, "sourceURL", 1234);
 }
 
 } // namespace
 
 } // namespace blink