Change EXTENSION_PROCESS_CREATED observers to use EXTENSION_HOST_CREATED.

chrome/browser/extensions/extension_host.cc

Index: chrome/browser/extensions/extension_host.cc
diff --git a/chrome/browser/extensions/extension_host.cc b/chrome/browser/extensions/extension_host.cc
index 8b2eba128425d419f8fb1817bd238477b0d207d1..6b6342a8198a1d358ed68514ffb4666a4779dc0c 100644
--- a/chrome/browser/extensions/extension_host.cc
+++ b/chrome/browser/extensions/extension_host.cc
@@ -148,10 +148,6 @@ ExtensionHost::ExtensionHost(const Extension* extension,
   if (enable_dom_automation_)
     render_view_host_->AllowBindings(content::BINDINGS_POLICY_DOM_AUTOMATION);
 
-  // Listen for when the render process' handle is available so we can add it
-  // to the task manager then.
-  registrar_.Add(this, content::NOTIFICATION_RENDERER_PROCESS_CREATED,
-                 content::Source<RenderProcessHost>(render_process_host()));
   // Listen for when an extension is unloaded from the same profile, as it may
   // be the same extension that this points to.
   registrar_.Add(this, chrome::NOTIFICATION_EXTENSION_UNLOADED,
@@ -297,12 +293,6 @@ void ExtensionHost::Observe(int type,
           IsBackgroundPageReady(extension_));
       NavigateToURL(url_);
       break;
-    case content::NOTIFICATION_RENDERER_PROCESS_CREATED:
-      content::NotificationService::current()->Notify(
-          chrome::NOTIFICATION_EXTENSION_PROCESS_CREATED,
-          content::Source<Profile>(profile_),
-          content::Details<ExtensionHost>(this));
-      break;
     case chrome::NOTIFICATION_EXTENSION_UNLOADED:
       // The extension object will be deleted after this notification has been
       // sent. NULL it out so that dirty pointer issues don't arise in cases