Correct data size argument type in resource loading path to unsigned

Source/core/fetch/RawResource.h

 /*
     Copyright (C) 1998 Lars Knoll (knoll@mpi-hd.mpg.de)
     Copyright (C) 2001 Dirk Mueller <mueller@kde.org>
     Copyright (C) 2006 Samuel Weinig (sam.weinig@gmail.com)
     Copyright (C) 2004, 2005, 2006, 2007 Apple Inc. All rights reserved.
 
     This library is free software; you can redistribute it and/or
     modify it under the terms of the GNU Library General Public
     License as published by the Free Software Foundation; either
     version 2 of the License, or (at your option) any later version.
@@ skipping 26 matching lines @@
 
     // FIXME: AssociatedURLLoader shouldn't be a DocumentThreadableLoader and therefore shouldn't
     // use RawResource. However, it is, and it needs to be able to defer loading.
     // This can be fixed by splitting CORS preflighting out of DocumentThreacableLoader.
     void setDefersLoading(bool);
 
     virtual bool canReuse(const ResourceRequest&) const OVERRIDE;
 
 private:
     virtual void didAddClient(ResourceClient*) OVERRIDE;
-    virtual void appendData(const char*, int) OVERRIDE;
+    virtual void appendData(const char*, unsigned) OVERRIDE;
 
     virtual bool shouldIgnoreHTTPStatusCodeErrors() const OVERRIDE { return true; }
 
     virtual void willSendRequest(ResourceRequest&, const ResourceResponse&) OVERRIDE;
     virtual void updateRequest(const ResourceRequest&) OVERRIDE;
     virtual void responseReceived(const ResourceResponse&) OVERRIDE;
     virtual void didSendData(unsigned long long bytesSent, unsigned long long totalBytesToBeSent) OVERRIDE;
     virtual void didDownloadData(int) OVERRIDE;
 };
 
@@ skipping 11 matching lines @@
 }
 
 class RawResourceClient : public ResourceClient {
 public:
     virtual ~RawResourceClient() { }
     static ResourceClientType expectedType() { return RawResourceType; }
     virtual ResourceClientType resourceClientType() const OVERRIDE FINAL { return expectedType(); }
 
     virtual void dataSent(Resource*, unsigned long long /* bytesSent */, unsigned long long /* totalBytesToBeSent */) { }
     virtual void responseReceived(Resource*, const ResourceResponse&) { }
-    virtual void dataReceived(Resource*, const char* /* data */, int /* length */) { }
+    virtual void dataReceived(Resource*, const char* /* data */, unsigned /* length */) { }
     virtual void redirectReceived(Resource*, ResourceRequest&, const ResourceResponse&) { }
     virtual void updateRequest(Resource*, const ResourceRequest&) { }
     virtual void dataDownloaded(Resource*, int) { }
 };
 
 }
 
 #endif // RawResource_h