Remove PlatformMouseEvent and use WebMouseEvent instead

third_party/WebKit/Source/platform/PlatformEvent.h

 /*
  * Copyright (C) 2011 Apple Inc. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions
  * are met:
  * 1. Redistributions of source code must retain the above copyright
  *    notice, this list of conditions and the following disclaimer.
  * 2. Redistributions in binary form must reproduce the above copyright
  *    notice, this list of conditions and the following disclaimer in the
@@ skipping 18 matching lines @@
 #include "wtf/Allocator.h"
 #include "wtf/Noncopyable.h"
 #include "wtf/Time.h"
 
 namespace blink {
 
 class PlatformEvent {
  public:
   enum EventType {
     NoType = 0,
-
-    // PlatformMouseEvent
-    MouseMoved,
-    MousePressed,
-    MouseReleased,
-    MouseScroll,
   };
 
   // These values are direct mappings of the values in WebInputEvent so the
   // values can be cast between the enumerations. static_asserts checking this
   // are in web/WebInputEventConversion.cpp.
   enum Modifiers {
     NoModifiers = 0,
     ShiftKey = 1 << 0,
     CtrlKey = 1 << 1,
     AltKey = 1 << 2,
@@ skipping 54 matching lines @@
   ~PlatformEvent() {}
 
   unsigned m_type;
   unsigned m_modifiers;
   TimeTicks m_timestamp;
 };
 
 }  // namespace blink
 
 #endif  // PlatformEvent_h