Correct data size argument type in resource loading path to unsigned

Source/web/WebSharedWorkerImpl.cpp

 /*
  * 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 213 matching lines @@
     return 0;
 }
 
 void WebSharedWorkerImpl::loadShadowPage()
 {
     WebLocalFrameImpl* webFrame = toWebLocalFrameImpl(m_webView->mainFrame());
 
     // Construct substitute data source for the 'shadow page'. We only need it
     // to have same origin as the worker so the loading checks work correctly.
     CString content("");
-    int length = static_cast<int>(content.length());
-    RefPtr<SharedBuffer> buffer(SharedBuffer::create(content.data(), length));
+    RefPtr<SharedBuffer> buffer(SharedBuffer::create(content.data(), content.length()));
     webFrame->frame()->loader().load(FrameLoadRequest(0, ResourceRequest(m_url), SubstituteData(buffer, "text/html", "UTF-8", KURL())));
 }
 
 void WebSharedWorkerImpl::didFinishDocumentLoad(WebLocalFrame* frame)
 {
     ASSERT(!m_loadingDocument);
     ASSERT(!m_mainScriptLoader);
     m_mainScriptLoader = Loader::create();
     m_loadingDocument = toWebLocalFrameImpl(frame)->frame()->document();
     m_mainScriptLoader->load(
@@ skipping 215 matching lines @@
     if (devtoolsAgent)
         devtoolsAgent->dispatchOnInspectorBackend(message);
 }
 
 WebSharedWorker* WebSharedWorker::create(WebSharedWorkerClient* client)
 {
     return new WebSharedWorkerImpl(client);
 }
 
 } // namespace blink