[Editing][DOM][CodeHealth] Make Node::hasEditableStyle global functions.

third_party/WebKit/Source/core/layout/line/RootInlineBox.cpp

 /*
  * Copyright (C) 2003, 2006, 2008 Apple Inc. All rights reserved.
  *
  * This library is free software; you can redistribute it and/or
  * modify it under the terms of the GNU Library General Public
  * License as published by the Free Software Foundation; either
  * version 2 of the License, or (at your option) any later version.
  *
  * This library is distributed in the hope that it will be useful,
  * but WITHOUT ANY WARRANTY; without even the implied warranty of
@@ skipping 389 matching lines @@
     return !block().style()->isFlippedBlocksWritingMode() ? std::max(lineTop(), selectionTop()) : std::min(lineBottom(), selectionBottom());
 }
 
 LineLayoutBlockFlow RootInlineBox::block() const
 {
     return LineLayoutBlockFlow(getLineLayoutItem());
 }
 
 static bool isEditableLeaf(InlineBox* leaf)
 {
-    return leaf && leaf->getLineLayoutItem().node() && leaf->getLineLayoutItem().node()->hasEditableStyle();
+    return leaf && leaf->getLineLayoutItem().node() && hasEditableStyle(*leaf->getLineLayoutItem().node());
 }
 
 InlineBox* RootInlineBox::closestLeafChildForPoint(const LayoutPoint& pointInContents, bool onlyEditableLeaves)
 {
     return closestLeafChildForLogicalLeftPosition(block().isHorizontalWritingMode() ? pointInContents.x() : pointInContents.y(), onlyEditableLeaves);
 }
 
 InlineBox* RootInlineBox::closestLeafChildForLogicalLeftPosition(LayoutUnit leftPosition, bool onlyEditableLeaves)
 {
     InlineBox* firstLeaf = firstLeafChild();
@@ skipping 281 matching lines @@
     endBox = nullptr;
     return nullptr;
 }
 
 const char* RootInlineBox::boxName() const
 {
     return "RootInlineBox";
 }
 
 } // namespace blink