Clean up ExtensionMessageService.

chrome/browser/renderer_host/browser_render_process_host.cc

Index: chrome/browser/renderer_host/browser_render_process_host.cc
diff --git a/chrome/browser/renderer_host/browser_render_process_host.cc b/chrome/browser/renderer_host/browser_render_process_host.cc
index e2a7fbac9c700348b448b5ab674e52b09b9bbdaa..884b1981b6fafc310bf37c72552f1932d5a357d0 100644
--- a/chrome/browser/renderer_host/browser_render_process_host.cc
+++ b/chrome/browser/renderer_host/browser_render_process_host.cc
@@ -241,11 +241,6 @@ BrowserRenderProcessHost::~BrowserRenderProcessHost() {
     audio_renderer_host_->Destroy();
 
   ClearTransportDIBCache();
-
-  NotificationService::current()->Notify(
-      NotificationType::EXTENSION_PORT_DELETED_DEBUG,
-      Source<IPC::Message::Sender>(this),
-      NotificationService::NoDetails());
 }
 
 bool BrowserRenderProcessHost::Init(bool is_extensions_process) {