Move initialization of ChromeURLRequestContexts to the IO thread.

chrome/browser/renderer_host/resource_dispatcher_host.h

 // Copyright (c) 2009 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 // This is the browser side of the resource dispatcher, it receives requests
 // from the child process (i.e. [Renderer, Plugin, Worker]ProcessHost), and
 // dispatches them to URLRequests. It then fowards the messages from the
 // URLRequests back to the correct process for handling.
 //
 // See http://dev.chromium.org/developers/design-documents/multi-process-resource-loading
@@ skipping 43 matching lines @@
   // NOTE: This class unfortunately cannot be named 'Delegate' because that
   // conflicts with the name of ResourceDispatcherHost's base class.
   //
   // If the receiver is unable to send a given message (i.e., if Send returns
   // false), then the ResourceDispatcherHost assumes the receiver has failed,
   // and the given request will be dropped. (This happens, for example, when a
   // renderer crashes and the channel dies).
   class Receiver : public IPC::Message::Sender,
                    public ChildProcessInfo {
    public:
-    // Return the URLRequestContext for the given request.
+    // Returns the URLRequestContext for the given request.
     // If NULL is returned, the default context for the profile is used.
     virtual URLRequestContext* GetRequestContext(
         uint32 request_id,
         const ViewHostMsg_Resource_Request& request_data) = 0;
 
    protected:
     explicit Receiver(ChildProcessInfo::ProcessType type, int child_id)
         : ChildProcessInfo(type, child_id) {}
     virtual ~Receiver() {}
   };
@@ skipping 405 matching lines @@
 
   // Keeps track of elements blocked by the Privacy Blacklist.
   chrome::BlockedResponse blocked_;
 
   static bool g_is_http_prioritization_enabled;
 
   DISALLOW_COPY_AND_ASSIGN(ResourceDispatcherHost);
 };
 
 #endif  // CHROME_BROWSER_RENDERER_HOST_RESOURCE_DISPATCHER_HOST_H_