Moves mash/wm into ash/mus

ash/mus/root_windows_observer.h

Index: ash/mus/root_windows_observer.h
diff --git a/mash/wm/root_windows_observer.h b/ash/mus/root_windows_observer.h
similarity index 69%
rename from mash/wm/root_windows_observer.h
rename to ash/mus/root_windows_observer.h
index 5ce6547f883479548d8113b5d45f995e33967bb1..9df111159a945cce0b7168a63f72982469352be6 100644
--- a/mash/wm/root_windows_observer.h
+++ b/ash/mus/root_windows_observer.h
@@ -2,11 +2,11 @@
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
-#ifndef MASH_WM_ROOT_WINDOW_OBSERVERS_H_
-#define MASH_WM_ROOT_WINDOW_OBSERVERS_H_
+#ifndef ASH_MUS_ROOT_WINDOW_OBSERVERS_H_
+#define ASH_MUS_ROOT_WINDOW_OBSERVERS_H_
 
-namespace mash {
-namespace wm {
+namespace ash {
+namespace mus {
 
 class RootWindowController;
 
@@ -20,7 +20,7 @@ class RootWindowsObserver {
   ~RootWindowsObserver() {}
 };
 
-}  // namespace wm
-}  // namespace mash
+}  // namespace mus
+}  // namespace ash
 
-#endif  // MASH_WM_ROOT_WINDOW_OBSERVERS_H_
+#endif  // ASH_MUS_ROOT_WINDOW_OBSERVERS_H_