Add unique_event_id to the WebTouchEvent

Source/web/WebInputEvent.cpp

 /*
  * Copyright (C) 2009 Google 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:
  *
  *     * Redistributions of source code must retain the above copyright
  * notice, this list of conditions and the following disclaimer.
  *     * Redistributions in binary form must reproduce the above
@@ skipping 42 matching lines @@
 struct SameSizeAsWebMouseWheelEvent : public SameSizeAsWebMouseEvent {
     int mousewheelData[10];
 };
 
 struct SameSizeAsWebGestureEvent : public SameSizeAsWebInputEvent {
     int gestureData[10];
 };
 
 struct SameSizeAsWebTouchEvent : public SameSizeAsWebInputEvent {
     WebTouchPoint touchPoints[WebTouchEvent::touchesLengthCap];
-    int touchData[2];
+    int touchData[4];
 };
 
 static_assert(sizeof(WebInputEvent) == sizeof(SameSizeAsWebInputEvent), "WebInputEvent should not have gaps");
 static_assert(sizeof(WebKeyboardEvent) == sizeof(SameSizeAsWebKeyboardEvent), "WebKeyboardEvent should not have gaps");
 static_assert(sizeof(WebMouseEvent) == sizeof(SameSizeAsWebMouseEvent), "WebMouseEvent should not have gaps");
 static_assert(sizeof(WebMouseWheelEvent) == sizeof(SameSizeAsWebMouseWheelEvent), "WebMouseWheelEvent should not have gaps");
 static_assert(sizeof(WebGestureEvent) == sizeof(SameSizeAsWebGestureEvent), "WebGestureEvent should not have gaps");
 static_assert(sizeof(WebTouchEvent) == sizeof(SameSizeAsWebTouchEvent), "WebTouchEvent should not have gaps");
 
 static const char* staticKeyIdentifiers(unsigned short keyCode)
@@ skipping 155 matching lines @@
     case VK_RSHIFT:
     case VK_RMENU:
     case VK_RWIN:
         return IsRight;
     default:
         return 0;
     }
 }
 
 } // namespace blink