Split the constructor of ThreadableLoader into two methods (ctor and start())

Source/web/AssociatedURLLoader.cpp

 /*
  * Copyright (C) 2010, 2011, 2012 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 341 matching lines @@
         const ResourceRequest& webcoreRequest = newRequest.toResourceRequest();
         if (webcoreRequest.requestContext() == WebURLRequest::RequestContextUnspecified) {
             // FIXME: We load URLs without setting a TargetType (and therefore a request context) in several
             // places in content/ (P2PPortAllocatorSession::AllocateLegacyRelaySession, for example). Remove
             // this once those places are patched up.
             newRequest.setRequestContext(WebURLRequest::RequestContextInternal);
         }
 
         Document* webcoreDocument = m_frameImpl->frame()->document();
         ASSERT(webcoreDocument);
-        m_loader = DocumentThreadableLoader::create(*webcoreDocument, m_clientAdapter.get(), webcoreRequest, options, resourceLoaderOptions);
+        m_loader = DocumentThreadableLoader::create(*webcoreDocument, m_clientAdapter.get(), options, resourceLoaderOptions);
+        m_loader->start(webcoreRequest);
     }
 
     if (!m_loader) {
         // FIXME: return meaningful error codes.
         m_clientAdapter->setDelayedError(ResourceError());
     }
     m_clientAdapter->enableErrorNotifications();
 }
 
 void AssociatedURLLoader::cancel()
 {
     if (m_clientAdapter)
         m_clientAdapter->clearClient();
     if (m_loader)
         m_loader->cancel();
 }
 
 void AssociatedURLLoader::setDefersLoading(bool defersLoading)
 {
     if (m_loader)
         m_loader->setDefersLoading(defersLoading);
 }
 
 } // namespace blink