Remove the concept of document.documentElement

sky/engine/core/editing/VisibleSelection.cpp

 /*
  * Copyright (C) 2004, 2005, 2006 Apple Computer, 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 246 matching lines @@
     Position oldBase = m_base;
     Position oldExtent = m_extent;
     Position oldStart = m_start;
     Position oldEnd = m_end;
     validate(granularity);
     if (m_base != oldBase || m_extent != oldExtent || m_start != oldStart || m_end != oldEnd)
         didChange();
     return true;
 }
 
-static PassRefPtr<Range> makeSearchRange(const Position& pos)
-{
-    Node* node = pos.deprecatedNode();
-    if (!node)
-        return nullptr;
-    Document& document = node->document();
-    if (!document.documentElement())
-        return nullptr;
-    Element* boundary = enclosingBlockFlowElement(*node);
-    if (!boundary)
-        return nullptr;
-
-    RefPtr<Range> searchRange(Range::create(document));
-    TrackExceptionState exceptionState;
-
-    Position start(pos.parentAnchoredEquivalent());
-    searchRange->selectNodeContents(boundary, exceptionState);
-    searchRange->setStart(start.containerNode(), start.offsetInContainerNode(), exceptionState);
-
-    ASSERT(!exceptionState.had_exception());
-    if (exceptionState.had_exception())
-        return nullptr;
-
-    return searchRange.release();
-}
-
-void VisibleSelection::appendTrailingWhitespace()
-{
-    RefPtr<Range> searchRange = makeSearchRange(m_end);
-    if (!searchRange)
-        return;
-
-    CharacterIterator charIt(searchRange.get(), TextIteratorEmitsCharactersBetweenAllVisiblePositions);
-    bool changed = false;
-
-    for (; charIt.length(); charIt.advance(1)) {
-        UChar c = charIt.characterAt(0);
-        if ((!isSpaceOrNewline(c) && c != noBreakSpace) || c == '\n')
-            break;
-        m_end = charIt.range()->endPosition();
-        changed = true;
-    }
-    if (changed)
-        didChange();
-}
-
 void VisibleSelection::setBaseAndExtentToDeepEquivalents()
 {
     // Move the selection to rendered positions, if possible.
     bool baseAndExtentEqual = m_base == m_extent;
     if (m_base.isNotNull()) {
         m_base = VisiblePosition(m_base, m_affinity).deepEquivalent();
         if (baseAndExtentEqual)
             m_extent = m_base;
     }
     if (m_extent.isNotNull() && !baseAndExtentEqual)
@@ skipping 524 matching lines @@
     sel.showTreeForThis();
 }
 
 void showTree(const blink::VisibleSelection* sel)
 {
     if (sel)
         sel->showTreeForThis();
 }
 
 #endif