Remove a redundant layout update from normalizeRangeAlgorithm

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

 /*
  * Copyright (C) 2004, 2005, 2006, 2007 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 1707 matching lines @@
     if (s.isNull() || e.isNull())
         return EphemeralRange();
 
     return EphemeralRange(s, e);
 }
 
 template <typename Strategy>
 static EphemeralRangeTemplate<Strategy> normalizeRangeAlgorithm(const EphemeralRangeTemplate<Strategy>& range)
 {
     DCHECK(range.isNotNull());
-    range.document().updateStyleAndLayoutIgnorePendingStylesheets();
+    DCHECK(!range.document().needsLayoutTreeUpdate());
+    DocumentLifecycle::DisallowTransitionScope disallowTransition(range.document().lifecycle());
 
     // TODO(yosin) We should not call |parentAnchoredEquivalent()|, it is
     // redundant.
     const PositionTemplate<Strategy> normalizedStart = mostForwardCaretPosition(range.startPosition()).parentAnchoredEquivalent();
     const PositionTemplate<Strategy> normalizedEnd = mostBackwardCaretPosition(range.endPosition()).parentAnchoredEquivalent();
     // The order of the positions of |start| and |end| can be swapped after
     // upstream/downstream. e.g. editing/pasteboard/copy-display-none.html
     if (normalizedStart.compareTo(normalizedEnd) > 0)
         return EphemeralRangeTemplate<Strategy>(normalizedEnd, normalizedStart);
     return EphemeralRangeTemplate<Strategy>(normalizedStart, normalizedEnd);
@@ skipping 178 matching lines @@
             return InputType::DeleteWordBackward;
         if (granularity == LineBoundary)
             return InputType::DeleteLineBackward;
         return InputType::DeleteContentBackward;
     default:
         return InputType::None;
     }
 }
 
 } // namespace blink