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 1a1b6d5f8102b02fcd7fdb6584124f711878e974..7bfa4813a99731415b3889c1c7e187642cde26fb 100644
--- a/Source/core/page/EventHandler.cpp
+++ b/Source/core/page/EventHandler.cpp
@@ -3674,9 +3674,13 @@ bool EventHandler::handleTouchEvent(const PlatformTouchEvent& event)
             touchTarget = node;
 
             // FIXME(rbyers): Should really be doing a second hit test that ignores inline elements - crbug.com/319479.

[Rick Byers, 2014/02/17 14:44:24]

Oh, and you can remove this FIXME now of course.

[gnana, 2014/02/24 18:59:50]

Done.

-            TouchAction effectiveTouchAction = computeEffectiveTouchAction(*node);
-            if (effectiveTouchAction != TouchActionAuto)
-                m_frame->page()->chrome().client().setTouchAction(effectiveTouchAction);
+            HitTestResult taResult = hitTestResultAtPoint(pagePoint, hitType | HitTestRequest::TouchAction);

[Rick Byers, 2014/02/17 14:43:52]

It's probably worth moving the hit test into computeEffectiveTouchAction (i.e.
have it take a point instead of a Node - I don't think it needs to take the
hitType, a constant should be fine).

[gnana, 2014/02/24 18:59:50]

Done.

+            Node* taNode = taResult.innerNode();
+            if (taNode == node) {

[Rick Byers, 2014/02/17 14:43:52]

You'll need to do this even when the hit test returns a different node than
'node'.  Eg. touching on an inline that contained inside of a block - the
touch-action of the block needs to be applied still.

[gnana, 2014/02/24 18:59:50]

Done.

+                TouchAction effectiveTouchAction = computeEffectiveTouchAction(*taNode);
+                if (effectiveTouchAction != TouchActionAuto)
+                    m_frame->page()->chrome().client().setTouchAction(effectiveTouchAction);
+            }
 
         } else if (pointState == PlatformTouchPoint::TouchReleased || pointState == PlatformTouchPoint::TouchCancelled) {
             // The target should be the original target for this touch, so get it from the hashmap. As it's a release or cancel