Cleanup mojo Wallpaper interfaces for mash.

chrome/browser/ui/webui/options/browser_options_handler.cc

Index: chrome/browser/ui/webui/options/browser_options_handler.cc
diff --git a/chrome/browser/ui/webui/options/browser_options_handler.cc b/chrome/browser/ui/webui/options/browser_options_handler.cc
index c7256dbe1f248db1bc9c08624c799f7669ae58f9..212aaba1bb6a4f0d5e273f7e5c1a7a79d68a72c7 100644
--- a/chrome/browser/ui/webui/options/browser_options_handler.cc
+++ b/chrome/browser/ui/webui/options/browser_options_handler.cc
@@ -118,7 +118,6 @@
 #if defined(OS_CHROMEOS)
 #include "ash/common/accessibility_types.h"  // nogncheck
 #include "ash/common/system/chromeos/devicetype_utils.h"  // nogncheck
-#include "ash/common/wallpaper/wallpaper_delegate.h"  // nogncheck
 #include "ash/shell.h"  // nogncheck
 #include "chrome/browser/browser_process_platform_part.h"
 #include "chrome/browser/chromeos/accessibility/accessibility_util.h"
@@ -1895,7 +1894,7 @@ void BrowserOptionsHandler::HandleRefreshExtensionControlIndicators(
 #if defined(OS_CHROMEOS)
 void BrowserOptionsHandler::HandleOpenWallpaperManager(
     const base::ListValue* args) {
-  ash::WmShell::Get()->wallpaper_delegate()->OpenSetWallpaperPage();
+  chromeos::WallpaperManager::Get()->Open();
 }
 
 void BrowserOptionsHandler::VirtualKeyboardChangeCallback(