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

Source/core/page/EventHandler.cpp

Index: Source/core/page/EventHandler.cpp
diff --git a/Source/core/page/EventHandler.cpp b/Source/core/page/EventHandler.cpp
index 43d96fa010d3d273a657f943bb249de7923a33aa..68ebf32f6765797935552e885e61df409ea13060 100644
--- a/Source/core/page/EventHandler.cpp
+++ b/Source/core/page/EventHandler.cpp
@@ -3668,8 +3668,7 @@ bool EventHandler::handleTouchEvent(const PlatformTouchEvent& event)
             m_originatingTouchPointTargets.set(touchPointTargetKey, node);
             touchTarget = node;
 
-            // FIXME(rbyers): Should really be doing a second hit test that ignores inline elements - crbug.com/319479.
-            TouchAction effectiveTouchAction = computeEffectiveTouchAction(*node);
+            TouchAction effectiveTouchAction = computeEffectiveTouchAction(pagePoint);
             if (effectiveTouchAction != TouchActionAuto)
                 m_frame->page()->chrome().client().setTouchAction(effectiveTouchAction);
 
@@ -3902,19 +3901,24 @@ TouchAction EventHandler::intersectTouchAction(TouchAction action1, TouchAction
     return action1 & action2;
 }
 
-TouchAction EventHandler::computeEffectiveTouchAction(const Node& node)
+TouchAction EventHandler::computeEffectiveTouchAction(const LayoutPoint& point)
 {
     // Optimization to minimize risk of this new feature (behavior should be identical
     // since there's no way to get non-default touch-action values).
     if (!RuntimeEnabledFeatures::cssTouchActionEnabled())
         return TouchActionAuto;
 
+    HitTestResult taResult = hitTestResultAtPoint(point, HitTestRequest::TouchEvent | HitTestRequest::ReadOnly | HitTestRequest::Active | HitTestRequest::TouchAction);
+    Node* node = taResult.innerNode();
+    if (!node)
+        return TouchActionAuto;
+
     // Start by permitting all actions, then walk the block level elements from
     // the target node up to the nearest scrollable ancestor and exclude any
     // prohibited actions. For now this is trivial, but when we add more types
     // of actions it'll get a little more complex.
     TouchAction effectiveTouchAction = TouchActionAuto;
-    for (const Node* curNode = &node; curNode; curNode = NodeRenderingTraversal::parent(curNode)) {
+    for (const Node* curNode = node; curNode; curNode = NodeRenderingTraversal::parent(curNode)) {
         // The spec says only block and SVG elements get touch-action.
         // FIXME(rbyers): Add correct support for SVG, crbug.com/247396.
         if (RenderObject* renderer = curNode->renderer()) {