Move undo files into //components/undo

components/undo/undo_manager.h

 // Copyright 2013 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 CHROME_BROWSER_UNDO_UNDO_MANAGER_H_
-#define CHROME_BROWSER_UNDO_UNDO_MANAGER_H_
+#ifndef COMPONENTS_UNDO_UNDO_MANAGER_H_
+#define COMPONENTS_UNDO_UNDO_MANAGER_H_
 
 #include "base/basictypes.h"
 #include "base/memory/scoped_ptr.h"
 #include "base/memory/scoped_vector.h"
 #include "base/observer_list.h"
 #include "base/strings/string16.h"
 
 class UndoManagerObserver;
 class UndoOperation;
 
@@ skipping 107 matching lines @@
   int undo_suspended_count_;
 
   // Set when executing Undo or Redo so that incoming changes are correctly
   // processed.
   bool performing_undo_;
   bool performing_redo_;
 
   DISALLOW_COPY_AND_ASSIGN(UndoManager);
 };
 
-#endif  // CHROME_BROWSER_UNDO_UNDO_MANAGER_H_
+#endif  // COMPONENTS_UNDO_UNDO_MANAGER_H_