Move undo files into //components/undo

components/undo/undo_manager.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 "chrome/browser/undo/undo_manager.h"
+#include "components/undo/undo_manager.h"
 
 #include "base/auto_reset.h"
 #include "base/logging.h"
-#include "chrome/browser/undo/undo_manager_observer.h"
-#include "chrome/browser/undo/undo_operation.h"
+#include "components/undo/undo_manager_observer.h"
+#include "components/undo/undo_operation.h"
 #include "grit/components_strings.h"
 #include "ui/base/l10n/l10n_util.h"
 
 namespace {
 
 // Maximum number of changes that can be undone.
 const size_t kMaxUndoGroups = 100;
 
 }  // namespace
 
@@ skipping 194 matching lines @@
   // Limit the number of undo levels so the undo stack does not grow unbounded.
   if (GetActiveUndoGroup()->size() > kMaxUndoGroups)
     GetActiveUndoGroup()->erase(GetActiveUndoGroup()->begin());
 
   NotifyOnUndoManagerStateChange();
 }
 
 ScopedVector<UndoGroup>* UndoManager::GetActiveUndoGroup() {
   return performing_undo_ ? &redo_actions_ : &undo_actions_;
 }