mus: move View Manager to components/mus/vm

components/mus/server_view_drawn_tracker_observer.h

Index: components/mus/server_view_drawn_tracker_observer.h
diff --git a/components/mus/server_view_drawn_tracker_observer.h b/components/mus/server_view_drawn_tracker_observer.h
deleted file mode 100644
index adf62c611616e6f019749579f95124fd0459ba01..0000000000000000000000000000000000000000
--- a/components/mus/server_view_drawn_tracker_observer.h
+++ /dev/null
@@ -1,28 +0,0 @@
-// Copyright 2015 The Chromium Authors. All rights reserved.
-// Use of this source code is governed by a BSD-style license that can be
-// found in the LICENSE file.
-
-#ifndef COMPONENTS_MUS_SERVER_VIEW_DRAWN_TRACKER_OBSERVER_H_
-#define COMPONENTS_MUS_SERVER_VIEW_DRAWN_TRACKER_OBSERVER_H_
-
-namespace mus {
-
-class ServerView;
-
-class ServerViewDrawnTrackerObserver {
- public:
-  // Invoked when the drawn state changes. If |is_drawn| is false |ancestor|
-  // identifies where the change occurred. In the case of a remove |ancestor| is
-  // the parent of the view that was removed. In the case of a visibility change
-  // |ancestor| is the parent of the view whose visibility changed.
-  virtual void OnDrawnStateChanged(ServerView* ancestor,
-                                   ServerView* view,
-                                   bool is_drawn) {}
-
- protected:
-  virtual ~ServerViewDrawnTrackerObserver() {}
-};
-
-}  // namespace mus
-
-#endif  // COMPONENTS_MUS_SERVER_VIEW_DRAWN_TRACKER_OBSERVER_H_