Change ComputedStyle::setWritingMode() to return void instead of bool

third_party/WebKit/Source/core/style/ComputedStyle.h

 /*
  * Copyright (C) 2000 Lars Knoll (knoll@kde.org)
  *           (C) 2000 Antti Koivisto (koivisto@kde.org)
  *           (C) 2000 Dirk Mueller (mueller@kde.org)
  * Copyright (C) 2003, 2005, 2006, 2007, 2008, 2009, 2010, 2011 Apple Inc. All
  * rights reserved.
  * 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
@@ skipping 2262 matching lines @@
   LineBreak getLineBreak() const {
     return static_cast<LineBreak>(m_rareInheritedData->lineBreak);
   }
   void setLineBreak(LineBreak b) { SET_VAR(m_rareInheritedData, lineBreak, b); }
 
   // writing-mode (aka -webkit-writing-mode, -epub-writing-mode)
   static WritingMode initialWritingMode() { return TopToBottomWritingMode; }
   WritingMode getWritingMode() const {
     return static_cast<WritingMode>(m_inheritedData.m_writingMode);
   }
-  bool setWritingMode(WritingMode v) {
-    if (v == getWritingMode())
-      return false;
-
-    m_inheritedData.m_writingMode = v;
-    return true;
-  }
+  void setWritingMode(WritingMode v) { m_inheritedData.m_writingMode = v; }
 
   // Text emphasis properties.
   static TextEmphasisFill initialTextEmphasisFill() {
     return TextEmphasisFillFilled;
   }
   static TextEmphasisMark initialTextEmphasisMark() {
     return TextEmphasisMarkNone;
   }
   static const AtomicString& initialTextEmphasisCustomMark() {
     return nullAtom;
@@ skipping 1767 matching lines @@
   m_nonInheritedData.m_pseudoBits |= 1 << (pseudo - 1);
 }
 
 inline bool ComputedStyle::hasPseudoElementStyle() const {
   return m_nonInheritedData.m_pseudoBits & ElementPseudoIdMask;
 }
 
 }  // namespace blink
 
 #endif  // ComputedStyle_h