Correct data size argument type in resource loading path to unsigned

Source/core/loader/WorkerThreadableLoader.h

 /*
  * Copyright (C) 2009 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 87 matching lines @@
 
             // All executed on the main thread.
             static void mainThreadDestroy(ExecutionContext*, MainThreadBridge*);
             virtual ~MainThreadBridge();
 
             static void mainThreadCreateLoader(ExecutionContext*, MainThreadBridge*, PassOwnPtr<CrossThreadResourceRequestData>, ThreadableLoaderOptions, ResourceLoaderOptions, const String& outgoingReferrer);
             static void mainThreadOverrideTimeout(ExecutionContext*, MainThreadBridge*, unsigned long timeoutMilliseconds);
             static void mainThreadCancel(ExecutionContext*, MainThreadBridge*);
             virtual void didSendData(unsigned long long bytesSent, unsigned long long totalBytesToBeSent) OVERRIDE;
             virtual void didReceiveResponse(unsigned long identifier, const ResourceResponse&) OVERRIDE;
-            virtual void didReceiveData(const char*, int dataLength) OVERRIDE;
+            virtual void didReceiveData(const char*, unsigned dataLength) OVERRIDE;
             virtual void didDownloadData(int dataLength) OVERRIDE;
             virtual void didReceiveCachedMetadata(const char*, int dataLength) OVERRIDE;
             virtual void didFinishLoading(unsigned long identifier, double finishTime) OVERRIDE;
             virtual void didFail(const ResourceError&) OVERRIDE;
             virtual void didFailAccessControlCheck(const ResourceError&) OVERRIDE;
             virtual void didFailRedirectCheck() OVERRIDE;
 
             // Only to be used on the main thread.
             RefPtr<ThreadableLoader> m_mainThreadLoader;
             OwnPtr<ThreadableLoaderClient> m_clientBridge;
 
             // ThreadableLoaderClientWrapper is to be used on the worker context thread.
             // The ref counting is done on either thread.
             RefPtr<ThreadableLoaderClientWrapper> m_workerClientWrapper;
 
             // Used on the worker context thread.
             WorkerLoaderProxy& m_loaderProxy;
         };
 
         WorkerThreadableLoader(WorkerGlobalScope&, PassRefPtr<ThreadableLoaderClientWrapper>, PassOwnPtr<ThreadableLoaderClient>, const ResourceRequest&, const ThreadableLoaderOptions&, const ResourceLoaderOptions&);
 
         RefPtrWillBePersistent<WorkerGlobalScope> m_workerGlobalScope;
         RefPtr<ThreadableLoaderClientWrapper> m_workerClientWrapper;
         MainThreadBridge& m_bridge;
     };
 
 } // namespace blink
 
 #endif // WorkerThreadableLoader_h