Move global function intersectsNode() to local function in FrameSelection.cpp

Source/core/editing/FrameSelection.cpp

 /*
  * Copyright (C) 2004, 2008, 2009, 2010 Apple Inc. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions
  * are met:
  * 1. Redistributions of source code must retain the above copyright
  *    notice, this list of conditions and the following disclaimer.
  * 2. Redistributions in binary form must reproduce the above copyright
  *    notice, this list of conditions and the following disclaimer in the
@@ skipping 342 matching lines @@
 {
     // There can't be a selection inside a fragment, so if a fragment's node is being removed,
     // the selection in the document that created the fragment needs no adjustment.
     if (isNone() || !node.inActiveDocument())
         return;
 
     respondToNodeModification(node, removingNodeRemovesPosition(node, m_selection.base()), removingNodeRemovesPosition(node, m_selection.extent()),
         removingNodeRemovesPosition(node, m_selection.start()), removingNodeRemovesPosition(node, m_selection.end()));
 }
 
+static bool intersectsNode(const VisibleSelection& selection, Node* node)
+{
+    if (selection.isNone())
+        return false;
+    Position start = selection.start().parentAnchoredEquivalent();
+    Position end = selection.end().parentAnchoredEquivalent();
+    TrackExceptionState exceptionState;
+    // TODO(yosin) We should avoid to use |Range::intersectsNode()|.
+    return Range::intersectsNode(node, start, end, exceptionState) && !exceptionState.hadException();
+}
+
 void FrameSelection::respondToNodeModification(Node& node, bool baseRemoved, bool extentRemoved, bool startRemoved, bool endRemoved)
 {
     ASSERT(node.document().isActive());
 
     bool clearLayoutTreeSelection = false;
     bool clearDOMTreeSelection = false;
 
     if (startRemoved || endRemoved) {
         Position start = m_selection.start();
         Position end = m_selection.end();
@@ skipping 1685 matching lines @@
 
 void showTree(const blink::FrameSelection* sel)
 {
     if (sel)
         sel->showTreeForThis();
     else
         fprintf(stderr, "Cannot showTree for (nil) FrameSelection.\n");
 }
 
 #endif