Move NotificationDelegate into message_center.

chrome/browser/notifications/notification_delegate.cc

Index: chrome/browser/notifications/notification_delegate.cc
diff --git a/chrome/browser/notifications/notification_delegate.cc b/chrome/browser/notifications/notification_delegate.cc
index 6dcf9b4be8c10ffc4374bf4c834c64b7fa67fd12..a8086a45a2f85f6e4296623726646b20a94e7fc0 100644
--- a/chrome/browser/notifications/notification_delegate.cc
+++ b/chrome/browser/notifications/notification_delegate.cc
@@ -1,15 +1,9 @@
-// Copyright (c) 2012 The Chromium Authors. All rights reserved.
+// Copyright (c) 2013 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "chrome/browser/notifications/notification_delegate.h"
 
-void NotificationDelegate::ButtonClick(int button_index) {
-}
+int NotificationDelegate::process_id() const { return -1; }
 
-int NotificationDelegate::process_id() const {
-  return -1;
-}
-
-void NotificationDelegate::ReleaseRenderViewHost() {
-}
+void NotificationDelegate::ReleaseRenderViewHost() {}