Adding an experimental app notification API.

chrome/browser/extensions/extension_service.h

Index: chrome/browser/extensions/extension_service.h
diff --git a/chrome/browser/extensions/extension_service.h b/chrome/browser/extensions/extension_service.h
index 7aae4ec432189b2ff7d2328b71e2918b4d4c9535..0c5e8e7f21ead962b8a5b73d46fd31c599f874b5 100644
--- a/chrome/browser/extensions/extension_service.h
+++ b/chrome/browser/extensions/extension_service.h
@@ -22,6 +22,7 @@
 #include "base/time.h"
 #include "base/tuple.h"
 #include "chrome/browser/extensions/apps_promo.h"
+#include "chrome/browser/extensions/extension_app_api.h"
 #include "chrome/browser/extensions/extension_icon_manager.h"
 #include "chrome/browser/extensions/extension_menu_manager.h"
 #include "chrome/browser/extensions/extension_prefs.h"
@@ -452,6 +453,10 @@ class ExtensionService
 
   ExtensionMenuManager* menu_manager() { return &menu_manager_; }
 
+  AppNotificationManager* app_notification_manager() {
+    return &app_notification_manager_;
+  }
+
   ExtensionBrowserEventRouter* browser_event_router() {
     return browser_event_router_.get();
   }
@@ -683,6 +688,9 @@ class ExtensionService
   // Keeps track of menu items added by extensions.
   ExtensionMenuManager menu_manager_;
 
+  // Keeps track of app notifications.
+  AppNotificationManager app_notification_manager_;
+
   // Keeps track of favicon-sized omnibox icons for extensions.
   ExtensionIconManager omnibox_icon_manager_;
   ExtensionIconManager omnibox_popup_icon_manager_;