Moves Shell::CreateShelf() to WmShell

chrome/browser/chromeos/login/users/wallpaper/wallpaper_manager_browsertest.cc

Index: chrome/browser/chromeos/login/users/wallpaper/wallpaper_manager_browsertest.cc
diff --git a/chrome/browser/chromeos/login/users/wallpaper/wallpaper_manager_browsertest.cc b/chrome/browser/chromeos/login/users/wallpaper/wallpaper_manager_browsertest.cc
index c635ae69f1d7607d9a97481183f2f4dc8a4baa1c..79386a8eeb6b1cab9590e10b5e13666b2d6b62bf 100644
--- a/chrome/browser/chromeos/login/users/wallpaper/wallpaper_manager_browsertest.cc
+++ b/chrome/browser/chromeos/login/users/wallpaper/wallpaper_manager_browsertest.cc
@@ -118,7 +118,7 @@ class WallpaperManagerBrowserTest : public InProcessBrowserTest {
                                                    false);
     // Adding a secondary display creates a shelf on that display, which
     // assumes a shelf on the primary display if the user was logged in.
-    ash::Shell::GetInstance()->CreateShelf();
+    ash::WmShell::Get()->CreateShelf();
     WaitAsyncWallpaperLoadStarted();
   }