Remove the concept of document.documentElement

sky/engine/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 83 matching lines @@
 
 FrameSelection::~FrameSelection()
 {
 #if !ENABLE(OILPAN)
     // Oilpan: No need to clear out VisibleSelection observer;
     // it is finalized as a part object of FrameSelection.
     stopObservingVisibleSelectionChangeIfNecessary();
 #endif
 }
 
-Element* FrameSelection::rootEditableElementOrDocumentElement() const
-{
-    Element* selectionRoot = m_selection.rootEditableElement();
-    return selectionRoot ? selectionRoot : m_frame->document()->documentElement();
-}
-
 ContainerNode* FrameSelection::rootEditableElementOrTreeScopeRootNode() const
 {
     Element* selectionRoot = m_selection.rootEditableElement();
     if (selectionRoot)
         return selectionRoot;
 
     Node* node = m_selection.base().containerNode();
     return node ? &node->treeScope().rootNode() : 0;
 }
 
@@ skipping 1125 matching lines @@
     RefPtr<Node> root = nullptr;
     Node* selectStartTarget = 0;
     if (isContentEditable()) {
         root = highestEditableRoot(m_selection.start());
         if (Node* shadowRoot = m_selection.nonBoundaryShadowTreeRootNode())
             selectStartTarget = shadowRoot->shadowHost();
         else
             selectStartTarget = root.get();
     } else {
         root = m_selection.nonBoundaryShadowTreeRootNode();
-        if (root)
+        if (root) {
             selectStartTarget = root->shadowHost();
-        else {
-            root = document->documentElement();
-            selectStartTarget = document->documentElement();
+        } else {
+            root = document;
+            selectStartTarget = document;
         }
     }
     if (!root)
         return;
 
     if (selectStartTarget && !selectStartTarget->dispatchEvent(Event::createCancelableBubble(EventTypeNames::selectstart)))
         return;
 
     VisibleSelection newSelection(VisibleSelection::selectionFromContentsOfNode(root.get()));
     setSelection(newSelection);
@@ skipping 359 matching lines @@
     sel.showTreeForThis();
 }
 
 void showTree(const blink::FrameSelection* sel)
 {
     if (sel)
         sel->showTreeForThis();
 }
 
 #endif