Clean up ExtensionMessageService.

chrome/browser/renderer_host/render_view_host.cc

Index: chrome/browser/renderer_host/render_view_host.cc
diff --git a/chrome/browser/renderer_host/render_view_host.cc b/chrome/browser/renderer_host/render_view_host.cc
index 9c633d31c221c8dbb00a7869e4cf47b108a64259..0a9844185920c377d2d2a1609d30ce889ebce467 100644
--- a/chrome/browser/renderer_host/render_view_host.cc
+++ b/chrome/browser/renderer_host/render_view_host.cc
@@ -145,11 +145,6 @@ RenderViewHost::~RenderViewHost() {
   // Be sure to clean up any leftover state from cross-site requests.
   Singleton<CrossSiteRequestManager>()->SetHasPendingCrossSiteRequest(
       process()->id(), routing_id(), false);
-
-  NotificationService::current()->Notify(
-      NotificationType::EXTENSION_PORT_DELETED_DEBUG,
-      Source<IPC::Message::Sender>(this),
-      NotificationService::NoDetails());
 }
 
 bool RenderViewHost::CreateRenderView(const string16& frame_name) {