Refactored static_cast'ing of events to use the AsXXXEvent() methods.

ui/events/ozone/evdev/input_injector_evdev_unittest.cc

 // 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.
 
 #include "ui/events/ozone/evdev/input_injector_evdev.h"
 
 #include "base/bind.h"
 #include "base/macros.h"
 #include "base/run_loop.h"
 #include "testing/gmock/include/gmock/gmock.h"
@@ skipping 14 matching lines @@
 class EventObserver {
  public:
   void EventDispatchCallback(Event* event) {
     DispatchEventFromNativeUiEvent(
         event, base::Bind(&EventObserver::OnEvent, base::Unretained(this)));
   }
 
   void OnEvent(Event* event) {
     if (event->IsMouseEvent()) {
       if (event->type() == ET_MOUSEWHEEL) {
-        OnMouseWheelEvent(static_cast<MouseWheelEvent*>(event));
+        OnMouseWheelEvent(event->AsMouseWheelEvent());
       } else {
-        OnMouseEvent(static_cast<MouseEvent*>(event));
+        OnMouseEvent(event->AsMouseEvent());
       }
     }
   }
 
   // Mock functions for intercepting mouse events.
   MOCK_METHOD1(OnMouseEvent, void(MouseEvent* event));
   MOCK_METHOD1(OnMouseWheelEvent, void(MouseWheelEvent* event));
 };
 
 class MockCursorEvdev : public CursorDelegateEvdev {
@@ skipping 168 matching lines @@
                                    MatchesMouseEvent(ET_MOUSEWHEEL, 0, 10, 20),
                                    Property(&MouseWheelEvent::x_offset, 100),
                                    Property(&MouseWheelEvent::y_offset, 0))));
   injector_.MoveCursorTo(gfx::PointF(10, 20));
   injector_.InjectMouseWheel(0, 100);
   injector_.InjectMouseWheel(100, 0);
   run_loop_.RunUntilIdle();
 }
 
 }  // namespace ui