Add WebPointerEvent, WebMouseProperties and WebPointerProperties types.

Source/web/WebInputEvent.cpp

Index: Source/web/WebInputEvent.cpp
diff --git a/Source/web/WebInputEvent.cpp b/Source/web/WebInputEvent.cpp
index dc2a0fe512f90f7d4aaa2fea1d2ea2f0c75d53d4..1ae15ddf2f7d07b798e9d899627898dc85e54bea 100644
--- a/Source/web/WebInputEvent.cpp
+++ b/Source/web/WebInputEvent.cpp
@@ -54,6 +54,10 @@ struct SameSizeAsWebMouseWheelEvent : public SameSizeAsWebMouseEvent {
     int mousewheelData[11];
 };
 
+struct SameSizeAsWebPointerEvent : public SameSizeAsWebMouseEvent {
+    int pointerPropertiesData[4];
+};
+
 struct SameSizeAsWebGestureEvent : public SameSizeAsWebInputEvent {
     int gestureData[10];
 };
@@ -67,6 +71,7 @@ static_assert(sizeof(WebInputEvent) == sizeof(SameSizeAsWebInputEvent), "WebInpu
 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(WebPointerEvent) == sizeof(SameSizeAsWebPointerEvent), "WebPointerEvent 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");