Nix GetRootWindowController, use RootWindowController::ForWindow.

ash/touch/touch_observer_hud_unittest.cc

Index: ash/touch/touch_observer_hud_unittest.cc
diff --git a/ash/touch/touch_observer_hud_unittest.cc b/ash/touch/touch_observer_hud_unittest.cc
index 7e7402fde36bfe5b1ec0d3526f840c07bfd68738..6223bfe4f0b829fe08cdde0631275e27c04bcb21 100644
--- a/ash/touch/touch_observer_hud_unittest.cc
+++ b/ash/touch/touch_observer_hud_unittest.cc
@@ -151,22 +151,22 @@ class TouchHudTestBase : public test::AshTestBase {
 
   RootWindowController* GetInternalRootController() {
     aura::Window* root = GetInternalRootWindow();
-    return GetRootWindowController(root);
+    return RootWindowController::ForWindow(root);
   }
 
   RootWindowController* GetExternalRootController() {
     aura::Window* root = GetExternalRootWindow();
-    return GetRootWindowController(root);
+    return RootWindowController::ForWindow(root);
   }
 
   RootWindowController* GetPrimaryRootController() {
     aura::Window* root = GetPrimaryRootWindow();
-    return GetRootWindowController(root);
+    return RootWindowController::ForWindow(root);
   }
 
   RootWindowController* GetSecondaryRootController() {
     aura::Window* root = GetSecondaryRootWindow();
-    return GetRootWindowController(root);
+    return RootWindowController::ForWindow(root);
   }
 
   display::ManagedDisplayInfo CreateDisplayInfo(int64_t id,