Refactor the guts of ResourceDispatcherHostImpl into a new class named

content/browser/renderer_host/resource_handler.cc

Index: content/browser/renderer_host/resource_handler.cc
===================================================================
--- content/browser/renderer_host/resource_handler.cc	(revision 0)
+++ content/browser/renderer_host/resource_handler.cc	(revision 0)
@@ -0,0 +1,13 @@
+// Copyright (c) 2012 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 "content/browser/renderer_host/resource_handler.h"
+
+namespace content {
+
+void ResourceHandler::SetController(ResourceController* controller) {
+  controller_ = controller;
+}
+
+}  // namespace content