Revert of Avoid two targeting phases in aura client-lib and EventProcessor.

ui/aura/test/test_window_targeter.h

-// Copyright 2017 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_AURA_TEST_TEST_WINDOW_TARGETER_H_
-#define UI_AURA_TEST_TEST_WINDOW_TARGETER_H_
-
-#include "base/macros.h"
-#include "ui/aura/window_targeter.h"
-#include "ui/events/event_targeter.h"
-
-namespace aura {
-namespace test {
-
-// A test WindowTargeter implementation that would always return the
-// EventTarget it received from FindTargetForEvent or FindNextBestTarget
-// as the EventTarget that should receive the event.
-class TestWindowTargeter : public WindowTargeter {
- public:
-  TestWindowTargeter();
-  ~TestWindowTargeter() override;
-
- protected:
-  // WindowTargeter:
-  ui::EventTarget* FindTargetForEvent(ui::EventTarget* root,
-                                      ui::Event* event) override;
-  ui::EventTarget* FindNextBestTarget(ui::EventTarget* previous_target,
-                                      ui::Event* event) override;
-
- private:
-  DISALLOW_COPY_AND_ASSIGN(TestWindowTargeter);
-};
-
-}  // namespace test
-}  // namespace aura
-
-#endif  // UI_AURA_TEST_TEST_WINDOW_TARGETER_H_