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

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

Index: third_party/WebKit/Source/core/style/ComputedStyle.h
diff --git a/third_party/WebKit/Source/core/style/ComputedStyle.h b/third_party/WebKit/Source/core/style/ComputedStyle.h
index 225dcbb2fea09328939f16314bf69bca5c2337fd..949545c3b94ba16efbeb2db579392bd459ac7ad1 100644
--- a/third_party/WebKit/Source/core/style/ComputedStyle.h
+++ b/third_party/WebKit/Source/core/style/ComputedStyle.h
@@ -2282,13 +2282,7 @@ class CORE_EXPORT ComputedStyle : public ComputedStyleBase,
   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() {