Correct data size argument type in resource loading path to unsigned

Source/core/loader/appcache/ApplicationCacheHost.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 94 matching lines @@
             long long m_size;
         };
 
         typedef Vector<ResourceInfo> ResourceInfoList;
 
         void selectCacheWithoutManifest();
         void selectCacheWithManifest(const KURL& manifestURL);
 
         void willStartLoadingMainResource(ResourceRequest&);
         void didReceiveResponseForMainResource(const ResourceResponse&);
-        void mainResourceDataReceived(const char* data, int length);
+        void mainResourceDataReceived(const char* data, unsigned length);
         void finishedLoadingMainResource();
         void failedLoadingMainResource();
 
         void willStartLoadingResource(ResourceRequest&);
 
         Status status() const;
         bool update();
         bool swapCache();
         void abort();
 
@@ skipping 45 matching lines @@
         Vector<DeferredEvent> m_deferredEvents;
 
         void dispatchDOMEvent(EventID, int progressTotal, int progressDone, WebApplicationCacheHost::ErrorReason, const String& errorURL, int errorStatus, const String& errorMessage);
 
         OwnPtr<WebApplicationCacheHost> m_host;
     };
 
 }  // namespace blink
 
 #endif  // ApplicationCacheHost_h