Create a content::ResourceContext.

content/browser/renderer_host/resource_dispatcher_host_unittest.cc

 // Copyright (c) 2011 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.
 
 #include <vector>
 
 #include "base/file_path.h"
 #include "base/message_loop.h"
 #include "base/process_util.h"
 #include "chrome/common/render_messages.h"
@@ skipping 112 matching lines @@
 
 // This class forwards the incoming messages to the ResourceDispatcherHostTest.
 // This is used to emulate different sub-processes, since this filter will
 // have a different ID than the original. For the test, we want all the incoming
 // messages to go to the same place, which is why this forwards.
 class ForwardingFilter : public ResourceMessageFilter {
  public:
   explicit ForwardingFilter(IPC::Message::Sender* dest)
     : ResourceMessageFilter(ChildProcessInfo::GenerateChildProcessUniqueId(),
                             ChildProcessInfo::RENDER_PROCESS,
+                            NULL,
                             NULL),
       dest_(dest) {
     OnChannelConnected(base::GetCurrentProcId());
   }
 
   // ResourceMessageFilter override
   virtual bool Send(IPC::Message* msg) {
     if (!dest_)
       return false;
     return dest_->Send(msg);
@@ skipping 861 matching lines @@
     const net::URLRequestStatus& status,
     const std::string& info) {
     return true;
   }
 
   void OnRequestClosed() {}
 
  private:
   DISALLOW_COPY_AND_ASSIGN(DummyResourceHandler);
 };