Correct data size argument type in resource loading path to unsigned

Source/core/inspector/InspectorResourceAgent.cpp

 /*
  * Copyright (C) 2011 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 99 matching lines @@
         bool useDetector = false;
         if (!textEncoding.isValid()) {
             textEncoding = UTF8Encoding();
             useDetector = true;
         }
         m_decoder = TextResourceDecoder::create("text/plain", textEncoding, useDetector);
         m_statusCode = response.httpStatusCode();
         m_responseHeaders = response.httpHeaderFields();
     }
 
-    virtual void didReceiveData(const char* data, int dataLength) OVERRIDE
+    virtual void didReceiveData(const char* data, unsigned dataLength) OVERRIDE
     {
         if (!dataLength)
             return;
 
-        if (dataLength == -1)
-            dataLength = strlen(data);
-
         m_responseText = m_responseText.concatenateWith(m_decoder->decode(data, dataLength));
     }
 
     virtual void didFinishLoading(unsigned long /*identifier*/, double /*finishTime*/) OVERRIDE
     {
         if (m_decoder)
             m_responseText = m_responseText.concatenateWith(m_decoder->flush());
         m_callback->sendSuccess(m_statusCode, buildObjectForHeaders(m_responseHeaders), m_responseText.flattenToString());
         dispose();
     }
@@ skipping 745 matching lines @@
     , m_removeFinishedReplayXHRTimer(this, &InspectorResourceAgent::removeFinishedReplayXHRFired)
 {
 }
 
 bool InspectorResourceAgent::shouldForceCORSPreflight()
 {
     return m_state->getBoolean(ResourceAgentState::cacheDisabled);
 }
 
 } // namespace blink