Promotes a handful of members from WmShell to Shell

ash/default_wallpaper_delegate.cc

Index: ash/default_wallpaper_delegate.cc
diff --git a/ash/default_wallpaper_delegate.cc b/ash/default_wallpaper_delegate.cc
index 1e78a74a786948c013b9ad56a10fcc4ed79027f9..48c28b48a97c0bd2aceb87151965d7910fe7f087 100644
--- a/ash/default_wallpaper_delegate.cc
+++ b/ash/default_wallpaper_delegate.cc
@@ -5,7 +5,7 @@
 #include "ash/default_wallpaper_delegate.h"
 
 #include "ash/common/wallpaper/wallpaper_controller.h"
-#include "ash/common/wm_shell.h"
+#include "ash/shell.h"
 #include "ui/wm/core/window_animations.h"
 
 namespace ash {
@@ -28,7 +28,7 @@ bool DefaultWallpaperDelegate::ShouldShowInitialAnimation() {
 void DefaultWallpaperDelegate::UpdateWallpaper(bool clear_cache) {}
 
 void DefaultWallpaperDelegate::InitializeWallpaper() {
-  WmShell::Get()->wallpaper_controller()->CreateEmptyWallpaper();
+  Shell::GetInstance()->wallpaper_controller()->CreateEmptyWallpaper();
 }
 
 bool DefaultWallpaperDelegate::CanOpenSetWallpaperPage() {