Revert of Implement Aura side of unified touch text selection for contents

ui/touch_selection/touch_selection_controller_test_api.h

-// Copyright 2015 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 UI_TOUCH_SELECTION_TOUCH_SELECTION_CONTROLLER_TEST_API_H_
-#define UI_TOUCH_SELECTION_TOUCH_SELECTION_CONTROLLER_TEST_API_H_
-
-#include "ui/touch_selection/touch_selection_controller.h"
-
-namespace ui {
-
-// Test api class to access internals of |ui::TouchSelectionController| in
-// tests.
-class TouchSelectionControllerTestApi {
- public:
-  explicit TouchSelectionControllerTestApi(
-      TouchSelectionController* controller);
-  ~TouchSelectionControllerTestApi();
-
-  bool GetStartVisible() const;
-  bool GetEndVisible() const;
-
-  bool temporarily_hidden() const { return controller_->temporarily_hidden_; }
-
- private:
-  TouchSelectionController* const controller_;
-
-  DISALLOW_COPY_AND_ASSIGN(TouchSelectionControllerTestApi);
-};
-
-}  // namespace ui
-
-#endif  // UI_TOUCH_SELECTION_TOUCH_SELECTION_CONTROLLER_TEST_API_H_