Move WebMouseWheelEvent into its own header file.

content/renderer/pepper/event_conversion.cc

 // Copyright (c) 2012 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 "content/renderer/pepper/event_conversion.h"
 
 #include <stddef.h>
 #include <stdint.h>
 #include <string.h>
 
 #include <memory>
 
 #include "base/i18n/char_iterator.h"
 #include "base/logging.h"
 #include "base/strings/string16.h"
 #include "base/strings/string_util.h"
 #include "base/strings/stringprintf.h"
 #include "base/strings/utf_string_conversion_utils.h"
 #include "base/strings/utf_string_conversions.h"
 #include "build/build_config.h"
 #include "content/common/input/web_touch_event_traits.h"
 #include "ppapi/c/pp_input_event.h"
 #include "ppapi/shared_impl/ppb_input_event_shared.h"
 #include "third_party/WebKit/public/platform/WebGamepads.h"
 #include "third_party/WebKit/public/platform/WebInputEvent.h"
+#include "third_party/WebKit/public/platform/WebMouseWheelEvent.h"
 #include "ui/events/keycodes/dom/keycode_converter.h"
 
 using ppapi::InputEventData;
 using blink::WebInputEvent;
 using blink::WebKeyboardEvent;
 using blink::WebMouseEvent;
 using blink::WebMouseWheelEvent;
 using blink::WebTouchEvent;
 using blink::WebTouchPoint;
 using blink::WebUChar;
@@ skipping 732 matching lines @@
       return PP_INPUTEVENT_CLASS_TOUCH;
     case WebInputEvent::TouchScrollStarted:
       return PP_InputEvent_Class(0);
     default:
       CHECK(WebInputEvent::isGestureEventType(event.type));
       return PP_InputEvent_Class(0);
   }
 }
 
 }  // namespace content