ui: Cleanup class/struct forward declarations

ui/events/test/test_event_target.h

 // 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.
 
 #ifndef UI_EVENTS_TEST_TEST_EVENT_TARGET_H_
 #define UI_EVENTS_TEST_TEST_EVENT_TARGET_H_
 
 #include <stddef.h>
 
 #include <set>
 #include <string>
 #include <vector>
 
 #include "base/macros.h"
 #include "base/memory/scoped_vector.h"
 #include "ui/events/event_target.h"
 
 typedef std::vector<std::string> HandlerSequenceRecorder;
 
-namespace gfx {
-class Point;
-}
-
 namespace ui {
 namespace test {
 
 class TestEventTarget : public EventTarget,
                         public EventHandler {
  public:
   TestEventTarget();
   ~TestEventTarget() override;
 
   void AddChild(std::unique_ptr<TestEventTarget> child);
@@ skipping 47 matching lines @@
   HandlerSequenceRecorder* recorder_;
   std::string target_name_;
 
   DISALLOW_COPY_AND_ASSIGN(TestEventTarget);
 };
 
 }  // namespace test
 }  // namespace ui
 
 #endif  // UI_EVENTS_TEST_TEST_EVENT_TARGET_H_