Audit the use of updateStyleAndLayoutIgnorePendingStylesheets in previous/nextLinePosition

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

 /*
  * Copyright (C) 2004, 2005, 2006, 2007, 2008, 2009 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 1325 matching lines @@
 }
 
 VisiblePosition previousLinePosition(const VisiblePosition& visiblePosition, LayoutUnit lineDirectionPoint, EditableType editableType)
 {
     Position p = visiblePosition.deepEquivalent();
     Node* node = p.anchorNode();
 
     if (!node)
         return VisiblePosition();
 
-    node->document().updateStyleAndLayoutIgnorePendingStylesheets();
+    DCHECK(!node->document().needsLayoutTreeUpdate());
 
     LayoutObject* layoutObject = node->layoutObject();
     if (!layoutObject)
         return VisiblePosition();
 
     RootInlineBox* root = 0;
     InlineBox* box = computeInlineBoxPosition(visiblePosition).inlineBox;
     if (box) {
         root = box->root().prevRootBox();
         // We want to skip zero height boxes.
@@ skipping 32 matching lines @@
 }
 
 VisiblePosition nextLinePosition(const VisiblePosition& visiblePosition, LayoutUnit lineDirectionPoint, EditableType editableType)
 {
     Position p = visiblePosition.deepEquivalent();
     Node* node = p.anchorNode();
 
     if (!node)
         return VisiblePosition();
 
-    node->document().updateStyleAndLayoutIgnorePendingStylesheets();
+    DCHECK(!node->document().needsLayoutTreeUpdate());
 
     LayoutObject* layoutObject = node->layoutObject();
     if (!layoutObject)
         return VisiblePosition();
 
     RootInlineBox* root = 0;
     InlineBox* box = computeInlineBoxPosition(visiblePosition).inlineBox;
     if (box) {
         root = box->root().nextRootBox();
         // We want to skip zero height boxes.
@@ skipping 1909 matching lines @@
 {
     return previousPositionOfAlgorithm<EditingStrategy>(visiblePosition, rule);
 }
 
 VisiblePositionInFlatTree previousPositionOf(const VisiblePositionInFlatTree& visiblePosition, EditingBoundaryCrossingRule rule)
 {
     return previousPositionOfAlgorithm<EditingInFlatTreeStrategy>(visiblePosition, rule);
 }
 
 } // namespace blink