Remove the notificationProvider extension API

chrome/browser/notifications/notification_conversion_helper.h

-// 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.
-
-#ifndef CHROME_BROWSER_NOTIFICATIONS_NOTIFICATION_CONVERSION_HELPER_H_
-#define CHROME_BROWSER_NOTIFICATIONS_NOTIFICATION_CONVERSION_HELPER_H_
-
-#include "chrome/browser/notifications/notification.h"
-#include "ui/message_center/notification_types.h"
-
-namespace extensions {
-namespace api {
-namespace notifications {
-struct NotificationOptions;
-struct NotificationBitmap;
-}  // namespace notifications
-}  // namespace api
-}  // namespace extensions
-
-namespace gfx {
-class Image;
-}
-
-// This class provides some static helper functions that could be used to
-// convert between different types of notification data.
-class NotificationConversionHelper {
- public:
-  // Converts Notification::Notification data to
-  // extensions::api::notifications::NotificationOptions.
-  static void NotificationToNotificationOptions(
-      const Notification& notification,
-      extensions::api::notifications::NotificationOptions* options);
-
-  // Converts gfx::Image (in ARGB format) type to
-  // extensions::api::notifications::NotificationBitmap type (RGBA).
-  static void GfxImageToNotificationBitmap(
-      const gfx::Image* gfx_image,
-      extensions::api::notifications::NotificationBitmap* return_image_args);
-
-  // Converts an extensions::api::notifications::NotificationBitmap type object
-  // with width, height, and data in RGBA format into an gfx::Image (ARGB).
-  static bool NotificationBitmapToGfxImage(
-      float max_scale,
-      const gfx::Size& target_size_dips,
-      const extensions::api::notifications::NotificationBitmap&
-          notification_bitmap,
-      gfx::Image* return_image);
-
- private:
-  // Conversts message_center::NotificationType to string type used to convert
-  // to extensions::api::notifications::TemplateType
-  static std::string MapTypeToString(message_center::NotificationType type);
-};
-
-#endif  // CHROME_BROWSER_NOTIFICATIONS_NOTIFICATION_CONVERSION_HELPER_H_