Gesture event hit test refactoring and reduction

Source/core/dom/Document.h

Index: Source/core/dom/Document.h
diff --git a/Source/core/dom/Document.h b/Source/core/dom/Document.h
index 698b5ecbb5ad2e9bac30396d4f402a0174e2e3a2..12592581d569592c9fff45be60a084f5cf812cba 100644
--- a/Source/core/dom/Document.h
+++ b/Source/core/dom/Document.h
@@ -86,6 +86,8 @@ class ElementDataCache;
 class Event;
 class EventFactoryBase;
 class EventListener;
+template <typename EventType>
+class EventWithHitTestResults;
 class ExceptionState;
 class FastTextAutosizer;
 class FloatQuad;
@@ -114,7 +116,6 @@ class LocalFrame;
 class Location;
 class MainThreadTaskRunner;
 class MediaQueryMatcher;
-class MouseEventWithHitTestResults;
 class NodeFilter;
 class NodeIterator;
 class Page;
@@ -151,6 +152,7 @@ class WebGLRenderingContext;
 struct AnnotatedRegionValue;
 struct IconURL;
 
+typedef EventWithHitTestResults<PlatformMouseEvent> MouseEventWithHitTestResults;
 typedef int ExceptionCode;
 
 enum StyleResolverUpdateMode {