Correct data size argument type in resource loading path to unsigned

Source/core/loader/DocumentThreadableLoader.h

 /*
  * Copyright (C) 2009, 2012 Google Inc. All rights reserved.
  * Copyright (C) 2013, Intel Corporation
  *
  * 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.
@@ skipping 56 matching lines @@
         enum BlockingBehavior {
             LoadSynchronously,
             LoadAsynchronously
         };
 
         DocumentThreadableLoader(Document&, ThreadableLoaderClient*, BlockingBehavior, const ResourceRequest&, const ThreadableLoaderOptions&, const ResourceLoaderOptions&);
 
         // RawResourceClient implementation
         virtual void dataSent(Resource*, unsigned long long bytesSent, unsigned long long totalBytesToBeSent) OVERRIDE;
         virtual void responseReceived(Resource*, const ResourceResponse&) OVERRIDE;
-        virtual void dataReceived(Resource*, const char* data, int dataLength) OVERRIDE;
+        virtual void dataReceived(Resource*, const char* data, unsigned dataLength) OVERRIDE;
         virtual void redirectReceived(Resource*, ResourceRequest&, const ResourceResponse&) OVERRIDE;
         virtual void notifyFinished(Resource*) OVERRIDE;
         virtual void dataDownloaded(Resource*, int) OVERRIDE;
 
         void cancelWithError(const ResourceError&);
 
         // Notify Inspector about resource response. Use this method if response is not going to be finished normally.
         void notifyResponseReceived(unsigned long identifier, const ResourceResponse&);
 
         // Methods containing code to handle resource fetch results which is
         // common to both sync and async mode.
         void handleResponse(unsigned long identifier, const ResourceResponse&);
-        void handleReceivedData(const char* data, int dataLength);
+        void handleReceivedData(const char* data, unsigned dataLength);
         void handleSuccessfulFinish(unsigned long identifier, double finishTime);
 
         void didTimeout(Timer<DocumentThreadableLoader>*);
         void makeCrossOriginAccessRequest(const ResourceRequest&);
         // Loads m_actualRequest.
         void loadActualRequest();
         // Clears m_actualRequest and reports access control check failure to
         // m_client.
         void handlePreflightFailure(const String& url, const String& errorDescription);
         // Investigates the response for the preflight request. If successful,
@@ skipping 32 matching lines @@
         OwnPtr<ResourceLoaderOptions> m_actualOptions;
 
         HTTPHeaderMap m_simpleRequestHeaders; // stores simple request headers in case of a cross-origin redirect.
         Timer<DocumentThreadableLoader> m_timeoutTimer;
         double m_requestStartedSeconds; // Time an asynchronous fetch request is started
     };
 
 } // namespace blink
 
 #endif // DocumentThreadableLoader_h