[FragmentItem] Remove |NGPaintFragment::NodeForHitTest|

Following r719562 <crrev.com/c/1937953> that moves the logic
for |NodeForHitTest| from |NGPaintFragment| to
|NGPhysicalFragment|, this patch removes the function and all
references to it.

Bug: 982194
Change-Id: Ie43a51a22e829249a9ef21791d42c1e3a702e06e
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1941456Reviewed-by: Yoshifumi Inoue <yosin@chromium.org>
Commit-Queue: Koji Ishii <kojii@chromium.org>
Cr-Commit-Position: refs/heads/master@{#719898}

third_party/blink/renderer/core/paint/ng/ng_box_fragment_painter.cc

@@ -1489,7 +1489,7 @@ bool NGBoxFragmentPainter::NodeAtPoint(HitTestResult& result,
     if (fragment.IsInlineBox())
       bounds_rect = PhysicalRect(PixelSnappedIntRect(bounds_rect));
     if (hit_test_location.Intersects(bounds_rect)) {
-      Node* node = paint_fragment_->NodeForHitTest();
+      Node* node = fragment.NodeForHitTest();
       if (!result.InnerNode() && node) {
         PhysicalOffset point = hit_test_location.Point() - physical_offset;
         result.SetNodeAndPosition(node, point);
@@ -1535,7 +1535,7 @@ bool NGBoxFragmentPainter::HitTestTextFragment(
   if (FragmentVisibleToHitTestRequest(text_paint_fragment,
                                       result.GetHitTestRequest()) &&
       hit_test_location.Intersects(rect)) {
-    Node* node = text_paint_fragment.NodeForHitTest();
+    Node* node = text_fragment.NodeForHitTest();
     if (!result.InnerNode() && node) {
       PhysicalOffset point = hit_test_location.Point() - physical_offset +
                              text_paint_fragment.InlineOffsetToContainerBox();
@@ -1601,7 +1601,7 @@ bool NGBoxFragmentPainter::HitTestLineBoxFragment(
     }
   }
 
-  Node* node = fragment.NodeForHitTest();
+  Node* node = line.NodeForHitTest();
   if (!result.InnerNode() && node) {
     const PhysicalOffset point = hit_test_location.Point() - physical_offset +
                                  fragment.InlineOffsetToContainerBox();

third_party/blink/renderer/core/paint/ng/ng_paint_fragment.h

@@ -215,10 +215,6 @@ class CORE_EXPORT NGPaintFragment : public RefCounted<NGPaintFragment>,
   // in DOM tree.
   PositionWithAffinity PositionForPoint(const PhysicalOffset&) const;
 
-  // The node to return when hit-testing on this fragment. This can be different
-  // from GetNode() when this fragment is content of a pseudo node.
-  Node* NodeForHitTest() const { return PhysicalFragment().NodeForHitTest(); }
-
   // Returns true when associated fragment of |layout_object| has line box.
   static bool TryMarkFirstLineBoxDirtyFor(const LayoutObject& layout_object);
   static bool TryMarkLastLineBoxDirtyFor(const LayoutObject& layout_object);