Cleanup anonymous text objects that pass the document as a node.

third_party/WebKit/Source/core/layout/LayoutText.cpp

 /*
  * (C) 1999 Lars Knoll (knoll@kde.org)
  * (C) 2000 Dirk Mueller (mueller@kde.org)
  * Copyright (C) 2004, 2005, 2006, 2007 Apple Inc. All rights reserved.
  * Copyright (C) 2006 Andrew Wellington (proton@wiretapped.net)
  * Copyright (C) 2006 Graham Dennis (graham.dennis@gmail.com)
  *
  * 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
@@ skipping 132 matching lines @@
               : WTF::Unicode::toTitleCase(stringWithPrevious[startOfWord]));
     }
     for (int i = startOfWord + 1; i < endOfWord; i++)
       result.append(input[i - 1]);
   }
 
   *string = result.toString();
 }
 
 LayoutText::LayoutText(Node* node, PassRefPtr<StringImpl> str)
-    : LayoutObject(!node || node->isDocumentNode() ? 0 : node),
+    : LayoutObject(node),
       m_hasTab(false),
       m_linesDirty(false),
       m_containsReversedText(false),
       m_knownToHaveNoOverflowAndNoFallbackFonts(false),
       m_minWidth(-1),
       m_maxWidth(-1),
       m_firstLineMinWidth(0),
       m_lastLineLineMinWidth(0),
       m_text(std::move(str)),
       m_firstTextBox(nullptr),
       m_lastTextBox(nullptr) {
   ASSERT(m_text);
-  // FIXME: Some clients of LayoutText (and subclasses) pass Document as node to
-  // create anonymous layoutObject.
-  // They should be switched to passing null and using setDocumentForAnonymous.
-  if (node && node->isDocumentNode())
-    setDocumentForAnonymous(toDocument(node));
+  DCHECK(!node || !node->isDocumentNode());
 
   setIsText();
 
-  view()->frameView()->incrementVisuallyNonEmptyCharacterCount(m_text.length());
+  if (node)
+    frameView()->incrementVisuallyNonEmptyCharacterCount(m_text.length());
 }
 
 #if DCHECK_IS_ON()
 
 LayoutText::~LayoutText() {
   ASSERT(!m_firstTextBox);
   ASSERT(!m_lastTextBox);
 }
 
 #endif
 
+LayoutText* LayoutText::createEmptyAnonymous(Document& doc) {
+  LayoutText* text = new LayoutText(nullptr, StringImpl::empty);
+  text->setDocumentForAnonymous(&doc);
+  return text;
+}
+
 bool LayoutText::isTextFragment() const {
   return false;
 }
 
 bool LayoutText::isWordBreak() const {
   return false;
 }
 
 void LayoutText::styleDidChange(StyleDifference diff,
                                 const ComputedStyle* oldStyle) {
@@ skipping 1857 matching lines @@
   LayoutRect rect = LayoutRect(
       IntRect(firstRunX(), firstRunY(), linesBox.width(), linesBox.height()));
   LayoutBlock* block = containingBlock();
   if (block && hasTextBoxes())
     block->adjustChildDebugRect(rect);
 
   return rect;
 }
 
 }  // namespace blink