Give WebTouchEvent and WebKeyboardEvent their own headers

ui/events/blink/blink_event_util.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_EVENTS_BLINK_BLINK_EVENT_UTIL_H_
 #define UI_EVENTS_BLINK_BLINK_EVENT_UTIL_H_
 
 #include <memory>
 
 #include "third_party/WebKit/public/platform/WebGestureEvent.h"
 #include "third_party/WebKit/public/platform/WebInputEvent.h"
+#include "third_party/WebKit/public/platform/WebTouchEvent.h"
 #include "ui/events/gesture_detection/motion_event.h"
 
-namespace blink {
-class WebTouchEvent;
-}
-
 namespace gfx {
 class PointF;
 class Vector2d;
 }
 
 namespace ui {
 enum class DomCode;
 struct GestureEventData;
 struct GestureEventDetails;
 class MotionEvent;
@@ skipping 67 matching lines @@
 
 inline const blink::WebGestureEvent& ToWebGestureEvent(
     const blink::WebInputEvent& event) {
   DCHECK(IsGestureScollOrPinch(event.type()));
   return static_cast<const blink::WebGestureEvent&>(event);
 }
 
 }  // namespace ui
 
 #endif  // UI_EVENTS_BLINK_BLINK_EVENT_UTIL_H_