ui: Cleanup class/struct forward declarations

ui/events/test/event_generator.h

 // Copyright 2014 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_EVENT_GENERATOR_H_
 #define UI_EVENTS_TEST_EVENT_GENERATOR_H_
 
 #include <list>
 #include <memory>
 #include <vector>
 
 #include "base/callback.h"
 #include "base/macros.h"
 #include "base/time/time.h"
 #include "ui/events/event_constants.h"
 #include "ui/events/keycodes/keyboard_codes.h"
 #include "ui/gfx/geometry/point.h"
 #include "ui/gfx/native_widget_types.h"
 
 namespace base {
 class TickClock;
 }
 
 namespace gfx {
 class PointF;
 }
 
 namespace ui {
 class Event;
-class EventProcessor;
 class EventSource;
 class EventTarget;
 class KeyEvent;
-class MouseEvent;
-class ScrollEvent;
-class TouchEvent;
 
 namespace test {
 
 typedef base::Callback<void(EventType, const gfx::Vector2dF&)>
         ScrollStepCallback;
 
 class EventGenerator;
 
 // A delegate interface for EventGenerator to abstract platform-specific event
 // targeting and coordinate conversion.
@@ skipping 361 matching lines @@
   bool targeting_application_;
   std::unique_ptr<base::TickClock> tick_clock_;
 
   DISALLOW_COPY_AND_ASSIGN(EventGenerator);
 };
 
 }  // namespace test
 }  // namespace ui
 
 #endif  // UI_EVENTS_TEST_EVENT_GENERATOR_H_