Move undo files into //components/undo

components/undo/undo_operation.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_OPERATION_H_
-#define CHROME_BROWSER_UNDO_UNDO_OPERATION_H_
+#ifndef COMPONENTS_UNDO_UNDO_OPERATION_H_
+#define COMPONENTS_UNDO_UNDO_OPERATION_H_
 
 // Base class for all undo operations.
 class UndoOperation {
  public:
   virtual ~UndoOperation() {}
 
   virtual void Undo() = 0;
 
   // Returns the resource string id describing the undo/redo of this operation
   // for use as labels in the UI.
   // Note: The labels describe the original user action, this may result in
   // the meaning of the redo label being reversed. For example, an
   // UndoOperation representing a deletion would have been created in order to
   // redo an addition by the user. In this case, the redo label string for the
   // UndoOperation of delete would be "Redo add".
   virtual int GetUndoLabelId() const = 0;
   virtual int GetRedoLabelId() const = 0;
 };
 
-#endif  // CHROME_BROWSER_UNDO_UNDO_OPERATION_H_
+#endif  // COMPONENTS_UNDO_UNDO_OPERATION_H_