Extract Notifications kClickWasNotAnAction constant

chrome/browser/notifications/persistent_notification_delegate.cc

 // Copyright 2014 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/persistent_notification_delegate.h"
 
 #include "base/bind.h"
 #include "base/guid.h"
 #include "chrome/browser/notifications/platform_notification_service_impl.h"
 #include "content/public/common/persistent_notification_status.h"
+#include "content/public/common/platform_notification_data.h"
 
 PersistentNotificationDelegate::PersistentNotificationDelegate(
     content::BrowserContext* browser_context,
     int64_t persistent_notification_id,
     const GURL& origin,
     int notification_settings_index)
     : browser_context_(browser_context),
       persistent_notification_id_(persistent_notification_id),
       origin_(origin),
       id_(base::GenerateGUID()),
       notification_settings_index_(notification_settings_index) {}
 
 PersistentNotificationDelegate::~PersistentNotificationDelegate() {}
 
 void PersistentNotificationDelegate::Display() {}
 
 void PersistentNotificationDelegate::Close(bool by_user) {
   PlatformNotificationServiceImpl::GetInstance()->OnPersistentNotificationClose(
       browser_context_,
       persistent_notification_id_,
       origin_);
 }
 
 void PersistentNotificationDelegate::Click() {
   PlatformNotificationServiceImpl::GetInstance()->OnPersistentNotificationClick(
       browser_context_,
       persistent_notification_id_,
       origin_,
-      -1 /* action_index */);
+      content::kNotificationClickWasNotAnAction);
 }
 
 void PersistentNotificationDelegate::ButtonClick(int button_index) {
   DCHECK_GE(button_index, 0);
   if (button_index == notification_settings_index_) {
     PlatformNotificationServiceImpl::GetInstance()->OpenNotificationSettings(
         browser_context_);
     return;
   }
 
   PlatformNotificationServiceImpl::GetInstance()->OnPersistentNotificationClick(
       browser_context_,
       persistent_notification_id_,
       origin_,
       button_index);
 }
 
 std::string PersistentNotificationDelegate::id() const {
   return id_;
 }