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 0de3be6c7595b8bc18294b4ddd5ca65bfb6feecb..8b341900d1af702f46c76c8b9b99c9ba8d9ede36 100644
--- a/Source/core/page/EventHandler.h
+++ b/Source/core/page/EventHandler.h
@@ -177,6 +177,9 @@ public:
 
     void notifyElementActivated();
 
+    // Move this to FrameHost? This acts like it's shared between all frames.
+    bool tapDownTriggeredActive() { return m_tapDownTriggeredActive; };
+
 private:
     static DragState& dragState();
 
@@ -393,8 +396,9 @@ private:
     float m_syntheticPageScaleFactor;
 
     Timer<EventHandler> m_activeIntervalTimer;
-    double m_lastShowPressTimestamp;
+    double m_lastActiveTimestamp;
     RefPtr<Element> m_lastDeferredTapElement;
+    bool m_tapDownTriggeredActive;
 };
 
 } // namespace WebCore