Cleanup mojo Wallpaper interfaces for mash.

chrome/browser/chromeos/background/ash_wallpaper_delegate.cc

 // 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.
 
 #include "chrome/browser/chromeos/background/ash_wallpaper_delegate.h"
 
 #include "ash/common/wallpaper/wallpaper_delegate.h"
 #include "ash/common/wm/window_animation_types.h"
 #include "ash/shell.h"
 #include "ash/wm/window_animations.h"
@@ skipping 68 matching lines @@
   }
 
   void UpdateWallpaper(bool clear_cache) override {
     chromeos::WallpaperManager::Get()->UpdateWallpaper(clear_cache);
   }
 
   void InitializeWallpaper() override {
     chromeos::WallpaperManager::Get()->InitializeWallpaper();
   }
 
-  void OpenSetWallpaperPage() override {
-    if (CanOpenSetWallpaperPage())
-      wallpaper_manager_util::OpenWallpaperManager();
-  }
-
   bool CanOpenSetWallpaperPage() override {
     const LoginState* login_state = LoginState::Get();
     const LoginState::LoggedInUserType user_type =
         login_state->GetLoggedInUserType();
     if (!login_state->IsUserLoggedIn())
       return false;
 
     // Whitelist user types that are allowed to change their wallpaper.  (Guest
     // users are not, see crosbug 26900.)
     if (user_type != LoginState::LOGGED_IN_USER_REGULAR &&
@@ skipping 33 matching lines @@
   DISALLOW_COPY_AND_ASSIGN(WallpaperDelegate);
 };
 
 }  // namespace
 
 ash::WallpaperDelegate* CreateWallpaperDelegate() {
   return new chromeos::WallpaperDelegate();
 }
 
 }  // namespace chromeos