chromeos: Promotes more from WmShell to Shell

ash/common/wallpaper/wallpaper_controller_unittest.cc

Index: ash/common/wallpaper/wallpaper_controller_unittest.cc
diff --git a/ash/common/wallpaper/wallpaper_controller_unittest.cc b/ash/common/wallpaper/wallpaper_controller_unittest.cc
index 007cb89b2a815c4fdf168324e0bec67776310c0d..766292d8a704ca0700e7b15afe4f7b1da3615e2f 100644
--- a/ash/common/wallpaper/wallpaper_controller_unittest.cc
+++ b/ash/common/wallpaper/wallpaper_controller_unittest.cc
@@ -118,7 +118,7 @@ class WallpaperControllerTest : public test::AshTestBase {
     root_window_controller->SetAnimatingWallpaperWidgetController(nullptr);
     controller_ = Shell::GetInstance()->wallpaper_controller();
     wallpaper_delegate_ = static_cast<test::TestWallpaperDelegate*>(
-        WmShell::Get()->wallpaper_delegate());
+        Shell::Get()->wallpaper_delegate());
     controller_->set_wallpaper_reload_delay_for_test(0);
   }