Make //content responsible for generating notification Ids

chrome/browser/notifications/notification_display_service.h

Index: chrome/browser/notifications/notification_display_service.h
diff --git a/chrome/browser/notifications/notification_display_service.h b/chrome/browser/notifications/notification_display_service.h
index 635c39848de8fdc404d99114096661c6ae381122..c4a47d10de67e37e28f7617ea080398875620b2b 100644
--- a/chrome/browser/notifications/notification_display_service.h
+++ b/chrome/browser/notifications/notification_display_service.h
@@ -41,10 +41,6 @@ class NotificationDisplayService : public KeyedService {
   // notifications and stores them in |*notification_ids| when possible.
   virtual bool GetDisplayed(std::set<std::string>* notifications) const = 0;
 
-  // Temporary method while we finish the refactor. Returns whether there is
-  // a native notification center backing up notifications.
-  virtual bool SupportsNotificationCenter() const = 0;
-
  private:
   DISALLOW_COPY_AND_ASSIGN(NotificationDisplayService);
 };