Changed the extension.connect() API not to broadcast to all tabs. Added a

chrome/browser/renderer_host/render_widget_host.h

Index: chrome/browser/renderer_host/render_widget_host.h
diff --git a/chrome/browser/renderer_host/render_widget_host.h b/chrome/browser/renderer_host/render_widget_host.h
index 02b19fc7132a8359e41cd55fdf85d51795fdc54b..74fe24effb3542b441f5bb6acd9a6f7197824cb2 100644
--- a/chrome/browser/renderer_host/render_widget_host.h
+++ b/chrome/browser/renderer_host/render_widget_host.h
@@ -115,7 +115,8 @@ struct ViewHostMsg_ShowPopup_Params;
 // anything else. When the view is live, these messages are forwarded to it by
 // the RenderWidgetHost's IPC message map.
 //
-class RenderWidgetHost : public IPC::Channel::Listener {
+class RenderWidgetHost : public IPC::Channel::Listener,
+                         public IPC::Channel::Sender {
  public:
   // An interface that gets called whenever a paint occurs.
   // Used in performance tests.