Restore to user selected wallpaper after browser crash

chrome/browser/ui/views/ash/chrome_shell_delegate.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/ui/views/ash/chrome_shell_delegate.h"
 
 #include "ash/launcher/launcher_types.h"
 #include "ash/system/tray/system_tray_delegate.h"
 #include "ash/wm/partial_screenshot_view.h"
 #include "ash/wm/window_util.h"
 #include "base/command_line.h"
 #include "chrome/browser/ui/browser.h"
 #include "chrome/browser/ui/browser_list.h"
 #include "chrome/browser/ui/views/ash/app_list/app_list_view_delegate.h"
 #include "chrome/browser/ui/views/ash/launcher/chrome_launcher_delegate.h"
 #include "chrome/browser/ui/views/ash/status_area_host_aura.h"
 #include "chrome/browser/ui/views/frame/browser_view.h"
 #include "chrome/common/chrome_switches.h"
 #include "ui/aura/window.h"
 
 #if defined(OS_CHROMEOS)
+#include "chrome/browser/chromeos/background/desktop_background_observer.h"
 #include "chrome/browser/chromeos/dbus/dbus_thread_manager.h"
 #include "chrome/browser/chromeos/dbus/power_manager_client.h"
 #include "chrome/browser/chromeos/system/ash_system_tray_delegate.h"
 #endif
 namespace {
 
 // Returns a list of Aura windows from a BrowserList, using either a
 // const_iterator or const_reverse_iterator.
 template<typename IT>
 std::vector<aura::Window*> GetBrowserWindows(IT begin, IT end) {
@@ skipping 70 matching lines @@
 }
 
 ash::SystemTrayDelegate* ChromeShellDelegate::CreateSystemTrayDelegate(
     ash::SystemTray* tray) {
 #if defined(OS_CHROMEOS)
   return chromeos::CreateSystemTrayDelegate(tray);
 #else
   return NULL;
 #endif
 }
+
+ash::UserWallpaperDelegate* ChromeShellDelegate::CreateUserWallpaperDelegate() {
+#if defined(OS_CHROMEOS)
+  return chromeos::CreateUserWallpaperDelegate();
+#else
+  return NULL;
+#endif
+}