[Editing][DOM][CodeHealth] Make Node::isContentEditable and Node::isRichEditable global functions.

third_party/WebKit/Source/core/editing/CaretBase.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 148 matching lines @@
     // FIXME: We should not allow paint invalidation out of paint invalidation state. crbug.com/457415
     DisablePaintInvalidationStateAsserts disabler;
     caretPainter.invalidatePaintRectangle(inflatedRect);
 }
 
 bool CaretBase::shouldRepaintCaret(Node& node) const
 {
     // If PositionAnchorType::BeforeAnchor or PositionAnchorType::AfterAnchor,
     // carets need to be repainted not only when the node is contentEditable but
     // also when its parentNode() is contentEditable.
-    return node.isContentEditable() || (node.parentNode() && node.parentNode()->isContentEditable());
+    return isContentEditable(node) || (node.parentNode() && isContentEditable(*node.parentNode()));
 }
 
 bool CaretBase::shouldRepaintCaret(const LayoutViewItem view) const
 {
     DCHECK(view);
     if (FrameView* frameView = view.frameView()) {
         LocalFrame& frame = frameView->frame(); // The frame where the selection started
         return frame.settings() && frame.settings()->caretBrowsingEnabled();
     }
     return false;
 }
 
 void CaretBase::invalidateCaretRect(Node* node, bool caretRectChanged)
 {
     if (caretRectChanged)
         return;
 
     if (LayoutViewItem view = node->document().layoutViewItem()) {
-        if (node->isContentEditable() || shouldRepaintCaret(view))
+        if (isContentEditable(*node) || shouldRepaintCaret(view))
             invalidateLocalCaretRect(node, localCaretRectWithoutUpdate());
     }
 }
 
 void CaretBase::paintCaret(Node* node, GraphicsContext& context, const LayoutPoint& paintOffset) const
 {
     if (m_caretVisibility == CaretVisibility::Hidden)
         return;
 
     LayoutRect drawingRect = localCaretRectWithoutUpdate();
@@ skipping 14 matching lines @@
 
     context.fillRect(FloatRect(drawingRect), caretColor);
 }
 
 void CaretBase::setCaretVisibility(CaretVisibility visibility)
 {
     m_caretVisibility = visibility;
 }
 
 } // namespace blink