Move undo files into //components/undo

components/undo/undo_operation.h

Index: components/undo/undo_operation.h
diff --git a/chrome/browser/undo/undo_operation.h b/components/undo/undo_operation.h
similarity index 85%
rename from chrome/browser/undo/undo_operation.h
rename to components/undo/undo_operation.h
index b1cbe78d4b98565a8f8c225002341bf80c0fff8d..b78f1036ae0f88f5f4282dc6ca92a6b79c19734d 100644
--- a/chrome/browser/undo/undo_operation.h
+++ b/components/undo/undo_operation.h
@@ -2,8 +2,8 @@
 // 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 {
@@ -23,4 +23,4 @@ class UndoOperation {
   virtual int GetRedoLabelId() const = 0;
 };
 
-#endif  // CHROME_BROWSER_UNDO_UNDO_OPERATION_H_
+#endif  // COMPONENTS_UNDO_UNDO_OPERATION_H_