Refactor notification operation functionality out of PNS

chrome/browser/ui/cocoa/notifications/notification_response_builder_mac.mm

 // Copyright 2016 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.
 
 #import "chrome/browser/ui/cocoa/notifications/notification_response_builder_mac.h"
 
 #include "base/logging.h"
 #include "chrome/browser/ui/cocoa/notifications/notification_constants_mac.h"
 
 namespace {
 
 // Make sure this Obj-C enum is kept in sync with the
-// PlatformNotificationServiceImpl NotificationOperation enum.
+// NotificationCommon::Operation enum.
 // The latter cannot be reused because the XPC service is not aware of
 // PlatformNotificationCenter.
 enum NotificationOperation {
   NOTIFICATION_CLICK = 0,
   NOTIFICATION_CLOSE = 1,
   NOTIFICATION_SETTINGS = 2
 };
 }  // namespace
 
 @implementation NotificationResponseBuilder
@@ skipping 65 matching lines @@
     notification_constants::kNotificationProfileId : profileId,
     notification_constants::kNotificationIncognito : incognito,
     notification_constants::kNotificationOperation :
         [NSNumber numberWithInt:operation],
     notification_constants::
     kNotificationButtonIndex : [NSNumber numberWithInt:buttonIndex],
   };
 }
 
 @end