chromeos: Promotes more from WmShell to Shell

ash/common/wallpaper/wallpaper_controller.cc

Index: ash/common/wallpaper/wallpaper_controller.cc
diff --git a/ash/common/wallpaper/wallpaper_controller.cc b/ash/common/wallpaper/wallpaper_controller.cc
index 8c1420afdf54986f6586160148d7bf087aaa2ec2..ac101323d0771a9614bb94ec53e1ed7582976db7 100644
--- a/ash/common/wallpaper/wallpaper_controller.cc
+++ b/ash/common/wallpaper/wallpaper_controller.cc
@@ -234,7 +234,7 @@ bool WallpaperController::WallpaperIsAlreadyLoaded(
 
 void WallpaperController::OpenSetWallpaperPage() {
   if (wallpaper_picker_ &&
-      WmShell::Get()->wallpaper_delegate()->CanOpenSetWallpaperPage()) {
+      Shell::Get()->wallpaper_delegate()->CanOpenSetWallpaperPage()) {
     wallpaper_picker_->Open();
   }
 }
@@ -326,7 +326,7 @@ int WallpaperController::GetWallpaperContainerId(bool locked) {
 
 void WallpaperController::UpdateWallpaper(bool clear_cache) {
   current_wallpaper_.reset();
-  WmShell::Get()->wallpaper_delegate()->UpdateWallpaper(clear_cache);
+  Shell::Get()->wallpaper_delegate()->UpdateWallpaper(clear_cache);
 }
 
 void WallpaperController::SetProminentColor(SkColor color) {