Refactor RenderProcessHost to use IPC::Listener instead of RenderWidgetHost

content/public/browser/render_widget_host.h

Index: content/public/browser/render_widget_host.h
diff --git a/content/public/browser/render_widget_host.h b/content/public/browser/render_widget_host.h
index 79a3935eff0a36697627d317cc9730b83547cbcb..2b3bd2ccfaf67edb491cf22505ba297f453180c6 100644
--- a/content/public/browser/render_widget_host.h
+++ b/content/public/browser/render_widget_host.h
@@ -35,9 +35,12 @@ struct WebScreenInfo;
 namespace content {
 
 class RenderProcessHost;
+class RenderWidgetHost;
 class RenderWidgetHostImpl;
 class RenderWidgetHostView;
 
+typedef std::vector<RenderWidgetHost*> RenderWidgetHostList;

[dcheng, 2013/06/11 00:34:58]

I think this typedef is unused.

+
 // A RenderWidgetHost manages the browser side of a browser<->renderer
 // HWND connection.  The HWND lives in the browser process, and
 // windows events are sent over IPC to the corresponding object in the
@@ -117,6 +120,13 @@ class CONTENT_EXPORT RenderWidgetHost : public IPC::Sender {
   static void AddCreatedCallback(const CreatedCallback& callback);
   static void RemoveCreatedCallback(const CreatedCallback& callback);
 
+  // Returns the RenderWidgetHost given its ID and the ID of its render process.
+  // Returns NULL if the IDs do not correspond to a live RenderWidgetHost.
+  static RenderWidgetHost* FromID(int32 process_id, int32 routing_id);
+
+  typedef std::vector<RenderWidgetHost*> List;
+  static scoped_ptr<RenderWidgetHost::List> GetRenderWidgetHosts();
+
   virtual ~RenderWidgetHost() {}
 
   // Edit operations.