Remove ImageSkia::empty and ImageSkia::extractSubset

chrome/browser/notifications/desktop_notification_service.cc

 // Copyright (c) 2012 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/desktop_notification_service.h"
 
 #include "base/metrics/histogram.h"
 #include "base/threading/thread.h"
 #include "base/utf_string_conversions.h"
 #include "chrome/browser/api/infobars/confirm_infobar_delegate.h"
@@ skipping 262 matching lines @@
   if (IsAshNotifyEnabled()) {
     // For Ash create a non-HTML notification with |icon|.
     Notification notification(GURL(), icon, title, message,
                               WebKit::WebTextDirectionDefault,
                               string16(), replace_id, delegate);
     g_browser_process->notification_ui_manager()->Add(notification, profile);
     return notification.notification_id();
   }
 #endif
   GURL icon_url;
-  if (!icon.empty())
+  if (!icon.isNull())
     icon_url = GURL(web_ui_util::GetImageDataUrl(icon));
   return AddNotification(
       origin_url, title, message, icon_url, replace_id, delegate, profile);
 }
 
 // static
 void DesktopNotificationService::RemoveNotification(
     const std::string& notification_id) {
     g_browser_process->notification_ui_manager()->CancelById(notification_id);
 }
@@ skipping 232 matching lines @@
 
   if (setting == CONTENT_SETTING_ALLOW)
     return WebKit::WebNotificationPresenter::PermissionAllowed;
   if (setting == CONTENT_SETTING_BLOCK)
     return WebKit::WebNotificationPresenter::PermissionDenied;
   if (setting == CONTENT_SETTING_ASK)
     return WebKit::WebNotificationPresenter::PermissionNotAllowed;
   NOTREACHED() << "Invalid notifications settings value: " << setting;
   return WebKit::WebNotificationPresenter::PermissionNotAllowed;
 }