Add hittest mode for Touch-action which ignore inline elements and svg elements

Source/core/rendering/HitTestRequest.h

Index: Source/core/rendering/HitTestRequest.h
diff --git a/Source/core/rendering/HitTestRequest.h b/Source/core/rendering/HitTestRequest.h
index 97dfa5165a72c72c815075403178ff20e7c9846e..44fd6e4ecc90ab3b88c3d93b34271ae4ed449946 100644
--- a/Source/core/rendering/HitTestRequest.h
+++ b/Source/core/rendering/HitTestRequest.h
@@ -40,7 +40,8 @@ public:
         AllowFrameScrollbars = 1 << 9,
         AllowChildFrameContent = 1 << 10,
         ChildFrameHitTest = 1 << 11,
-        IgnorePointerEventsNone = 1 << 12
+        IgnorePointerEventsNone = 1 << 12,
+        TouchAction = 1 << 13, // Hit testing for touch-action considers only block-level elements
     };
 
     typedef unsigned HitTestRequestType;
@@ -63,6 +64,7 @@ public:
     bool allowsChildFrameContent() const { return m_requestType & AllowChildFrameContent; }
     bool isChildFrameHitTest() const { return m_requestType & ChildFrameHitTest; }
     bool ignorePointerEventsNone() const { return m_requestType & IgnorePointerEventsNone; }
+    bool touchAction() const { return m_requestType & TouchAction; }
 
     // Convenience functions
     bool touchMove() const { return move() && touchEvent(); }