Send early ShowPress on TapDown when page isn't scrollable/pinchable.

Source/core/page/EventHandler.h

Index: Source/core/page/EventHandler.h
diff --git a/Source/core/page/EventHandler.h b/Source/core/page/EventHandler.h
index 38d487f19e351ddf52c85eb552801f87b6c9c8f7..885f45b4888088e7a457829c0a5d398b6eef4acc 100644
--- a/Source/core/page/EventHandler.h
+++ b/Source/core/page/EventHandler.h
@@ -178,6 +178,9 @@ public:
 
     void notifyElementActivated();
 
+    LocalFrame* frameForGestureEvent(const PlatformGestureEvent&, IntPoint& adjustedPoint);
+
+    bool hasScrollableAncestor(const Node*) const;
 private:
     static DragState& dragState();
 
@@ -306,7 +309,6 @@ private:
     bool passGestureEventToWidget(const PlatformGestureEvent&, Widget*);
     bool passGestureEventToWidgetIfPossible(const PlatformGestureEvent&, RenderObject*);
     bool sendScrollEventToView(const PlatformGestureEvent&, const FloatSize&);
-    LocalFrame* getSubFrameForGestureEvent(const IntPoint& touchAdjustedPoint, const PlatformGestureEvent&);
 
     AutoscrollController* autoscrollController() const;
     bool panScrollInProgress() const;