Folds methods in WmShellCommon to WmShell

chrome/browser/chromeos/extensions/wallpaper_private_api.cc

Index: chrome/browser/chromeos/extensions/wallpaper_private_api.cc
diff --git a/chrome/browser/chromeos/extensions/wallpaper_private_api.cc b/chrome/browser/chromeos/extensions/wallpaper_private_api.cc
index a0905ed8ba982031e353408e08b72111211476cd..534b44243a366e575c0b6ddbc03752918b7b9829 100644
--- a/chrome/browser/chromeos/extensions/wallpaper_private_api.cc
+++ b/chrome/browser/chromeos/extensions/wallpaper_private_api.cc
@@ -14,6 +14,7 @@
 #include "ash/aura/wm_window_aura.h"
 #include "ash/common/wm/mru_window_tracker.h"
 #include "ash/common/wm/window_state.h"
+#include "ash/common/wm_shell.h"
 #include "ash/desktop_background/desktop_background_controller.h"
 #include "ash/shell.h"
 #include "ash/wm/window_state_aura.h"
@@ -216,10 +217,8 @@ void WindowStateManager::BuildWindowListAndMinimizeInactiveForUser(
   std::set<aura::Window*>* results =
       &user_id_hash_window_list_map_[user_id_hash];
 
-  std::vector<aura::Window*> windows =
-      ash::WmWindowAura::ToAuraWindows(ash::Shell::GetInstance()
-                                           ->mru_window_tracker()
-                                           ->BuildWindowListIgnoreModal());
+  std::vector<aura::Window*> windows = ash::WmWindowAura::ToAuraWindows(
+      ash::WmShell::Get()->mru_window_tracker()->BuildWindowListIgnoreModal());
 
   for (std::vector<aura::Window*>::iterator iter = windows.begin();
        iter != windows.end(); ++iter) {