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

Source/core/rendering/InlineFlowBox.cpp

Index: Source/core/rendering/InlineFlowBox.cpp
diff --git a/Source/core/rendering/InlineFlowBox.cpp b/Source/core/rendering/InlineFlowBox.cpp
index 66e89f3b5e07451a201aeafa4dd0e65654b1724f..e2742f4d906460edac73a1565d6584da6a1abdf1 100644
--- a/Source/core/rendering/InlineFlowBox.cpp
+++ b/Source/core/rendering/InlineFlowBox.cpp
@@ -1053,6 +1053,9 @@ bool InlineFlowBox::nodeAtPoint(const HitTestRequest& request, HitTestResult& re
     flipForWritingMode(rect);
     rect.moveBy(accumulatedOffset);
 
+    if (request.touchAction())
+        return false;
+
     if (visibleToHitTestRequest(request) && locationInContainer.intersects(rect)) {

[gnana, 2014/02/27 13:26:59]

i feel this rect should have been computed from renderer->size(), then the
locationInContainer.intersects(rect) will fail.
But its computed from InlineFlowBox::roundedFrameRect(). I dont understand why
this is done.

I have added a hittestrequest::touchaction check to fix the bug. Now body
element is return for the test case when touch on span element.

<div class='ta-none' style='height: 0; margin-bottom: 50px'>
  <span expected-action='auto'>
    touch-action should not be inherited by inline elements
  </span>
</div>

[Rick Byers, 2014/02/27 14:53:11]

Ah, this makes sense.  The RenderBlock has a bunch of InlineFlowBoxes, and
InlineBox::visibleToHitTestRequest is calling into
RenderBlock::visibleToHitTestRequest here.  I think this is the right thing to
do, except that the touchAction check probably belongs inside of
InlineBox::visibleToHitTestRequest instead of here.  That way any other uses of
InlineBox know that touch-action hit tests are never satisfied by them.

[gnana, 2014/02/28 10:04:25]

Moved the change to InlineBox
Done.

         renderer()->updateHitTestResult(result, flipForWritingMode(locationInContainer.point() - toLayoutSize(accumulatedOffset))); // Don't add in m_x or m_y here, we want coords in the containing block's space.
         if (!result.addNodeToRectBasedTestResult(renderer()->node(), request, locationInContainer, rect))