Add support for Ash to Notifications

chrome/browser/notifications/notification_delegate.h

Index: chrome/browser/notifications/notification_delegate.h
diff --git a/chrome/browser/notifications/notification_delegate.h b/chrome/browser/notifications/notification_delegate.h
index 81a4a00fa7a3257fd20d7c2607facf24437be5d3..dae7794bd18696849beb41fd5451c20e763f8692 100644
--- a/chrome/browser/notifications/notification_delegate.h
+++ b/chrome/browser/notifications/notification_delegate.h
@@ -10,6 +10,10 @@
 
 #include "base/memory/ref_counted.h"
 
+namespace content {
+class RenderViewHost;
+}
+
 // Delegate for a notification. This class has two role, to implement
 // callback methods for notification, and provides an identify of
 // the associated notification.
@@ -33,6 +37,9 @@ class NotificationDelegate
   // Returns unique id of the notification.
   virtual std::string id() const = 0;
 
+  // Returns the RenderViewHost that generated the notification, or NULL.
+  virtual content::RenderViewHost* GetRenderViewHost() const = 0;
+
  protected:
   virtual ~NotificationDelegate() {}