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

third_party/WebKit/Source/core/editing/EditingStyle.cpp

 /*
  * Copyright (C) 2007, 2008, 2009 Apple Computer, Inc.
  * Copyright (C) 2010, 2011 Google 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
@@ skipping 729 matching lines @@
 {
     if (selection.isNone())
         return FalseTriState;
 
     if (selection.isCaret())
         return triStateOfStyle(EditingStyle::styleAtSelectionStart(selection));
 
     TriState state = FalseTriState;
     bool nodeIsStart = true;
     for (Node& node : NodeTraversal::startsAt(*selection.start().anchorNode())) {
-        if (node.layoutObject() && node.hasEditableStyle()) {
+        if (node.layoutObject() && hasEditableStyle(node)) {
             CSSComputedStyleDeclaration* nodeStyle = CSSComputedStyleDeclaration::create(&node);
             if (nodeStyle) {
                 // If the selected element has <sub> or <sup> ancestor element, apply the corresponding
                 // style(vertical-align) to it so that document.queryCommandState() works with the style.
                 // See bug http://crbug.com/582225.
                 if (m_isVerticalAlign && getIdentifierValue(nodeStyle, CSSPropertyVerticalAlign) == CSSValueBaseline) {
                     const CSSPrimitiveValue* verticalAlign = toCSSPrimitiveValue(m_mutableStyle->getPropertyCSSValue(CSSPropertyVerticalAlign));
                     if (hasAncestorVerticalAlignStyle(node, verticalAlign->getValueID()))
                         node.mutableComputedStyle()->setVerticalAlign(verticalAlign->convertTo<EVerticalAlign>());
                 }
@@ skipping 996 matching lines @@
 {
     for (Node* ancestor = node; ancestor; ancestor = ancestor->parentNode()) {
         CSSComputedStyleDeclaration* ancestorStyle = CSSComputedStyleDeclaration::create(ancestor);
         if (!hasTransparentBackgroundColor(ancestorStyle))
             return ancestorStyle->getPropertyCSSValue(CSSPropertyBackgroundColor);
     }
     return nullptr;
 }
 
 } // namespace blink