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

chrome/browser/renderer_host/mock_render_process_host.cc

Index: chrome/browser/renderer_host/mock_render_process_host.cc
===================================================================
--- chrome/browser/renderer_host/mock_render_process_host.cc	(revision 8331)
+++ chrome/browser/renderer_host/mock_render_process_host.cc	(working copy)
@@ -16,7 +16,8 @@
 }
 
 int MockRenderProcessHost::GetNextRoutingID() {
-  return 5;
+  static int prev_routing_id = 0;
+  return ++prev_routing_id;
 }
 
 void MockRenderProcessHost::CancelResourceRequests(int render_widget_id) {
@@ -61,6 +62,3 @@
 
 void MockRenderProcessHost::OnChannelConnected(int32 peer_pid) {
 }
-
-void MockRenderProcessHost::Unregister() {
-}