Move undo files into //components/undo

components/undo/undo_manager_test.cc

 // 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.
 
 #include "base/auto_reset.h"
-#include "chrome/browser/undo/undo_manager.h"
-#include "chrome/browser/undo/undo_manager_observer.h"
-#include "chrome/browser/undo/undo_operation.h"
+#include "components/undo/undo_manager.h"
+#include "components/undo/undo_manager_observer.h"
+#include "components/undo/undo_operation.h"
 #include "testing/gtest/include/gtest/gtest.h"
 
 namespace {
 
 class TestUndoOperation;
 
 // TestUndoService -------------------------------------------------------------
 
 class TestUndoService {
  public:
@@ skipping 237 matching lines @@
   undo_service.undo_manager_.Redo();
   int callback_count_after_redo = observer.state_change_count();
   EXPECT_GT(callback_count_after_redo, callback_count_after_undo);
 
   undo_service.undo_manager_.RemoveObserver(&observer);
   undo_service.undo_manager_.Undo();
   EXPECT_EQ(callback_count_after_redo, observer.state_change_count());
 }
 
 } // namespace