Factor out the test web contents from the WebContents unit test so that it ca...

chrome/browser/renderer_host/mock_render_process_host.cc

 // 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.
 
 #include "chrome/browser/renderer_host/mock_render_process_host.h"
 
 MockRenderProcessHost::MockRenderProcessHost(Profile* profile)
     : RenderProcessHost(profile) {
 }
 
 MockRenderProcessHost::~MockRenderProcessHost() {
 }
 
 bool MockRenderProcessHost::Init() {
   return true;
 }
 
 int MockRenderProcessHost::GetNextRoutingID() {
-  return 5;
+  static int prev_routing_id = 0;
+  return ++prev_routing_id;
 }
 
 void MockRenderProcessHost::CancelResourceRequests(int render_widget_id) {
 }
 
 void MockRenderProcessHost::CrossSiteClosePageACK(
     int new_render_process_host_id,
     int new_request_id) {
 }
 
@@ skipping 24 matching lines @@
   sink_.OnMessageReceived(*msg);
   delete msg;
   return true;
 }
 
 void MockRenderProcessHost::OnMessageReceived(const IPC::Message& msg) {
 }
 
 void MockRenderProcessHost::OnChannelConnected(int32 peer_pid) {
 }
-
-void MockRenderProcessHost::Unregister() {
-}