Remove chrome::NOTIFICATION_PROFILE_DESTROYED usage from src/extensions

extensions/browser/process_manager.h

Index: extensions/browser/process_manager.h
diff --git a/extensions/browser/process_manager.h b/extensions/browser/process_manager.h
index e3c6bcf06aa550e2ca8d350312b1e0732ec01d0b..a5422bc756942ca27028a8795e9d9c0533851d10 100644
--- a/extensions/browser/process_manager.h
+++ b/extensions/browser/process_manager.h
@@ -128,6 +128,9 @@ class ProcessManager : public content::NotificationObserver {
   // loaded.
   void MaybeCreateStartupBackgroundHosts();
 
+  // Called on shutdown to close our extension hosts.
+  void CloseBackgroundHosts();
+
   // Gets the BrowserContext associated with site_instance_ and all other
   // related SiteInstances.
   content::BrowserContext* GetBrowserContext() const;
@@ -165,9 +168,6 @@ class ProcessManager : public content::NotificationObserver {
                  content::BrowserContext* original_context,
                  ExtensionRegistry* registry);
 
-  // Called on browser shutdown to close our extension hosts.
-  void CloseBackgroundHosts();
-
   // content::NotificationObserver:
   virtual void Observe(int type,
                        const content::NotificationSource& source,