| Index: third_party/WebKit/Source/core/css/cssom/CSSNumberValue.h
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| diff --git a/third_party/WebKit/Source/core/css/cssom/CSSNumberValue.h b/third_party/WebKit/Source/core/css/cssom/CSSNumberValue.h
 | 
| index d181d0f370acc00c47abda98919258a78a1bdef4..ee0b3e6d9d076738e61952d930ee8cca50628e2f 100644
 | 
| --- a/third_party/WebKit/Source/core/css/cssom/CSSNumberValue.h
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| +++ b/third_party/WebKit/Source/core/css/cssom/CSSNumberValue.h
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| @@ -37,6 +37,12 @@ class CORE_EXPORT CSSNumberValue final : public CSSStyleValue {
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|    double m_value;
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|  };
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|  
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| +DEFINE_TYPE_CASTS(CSSNumberValue,
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| +                  CSSStyleValue,
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| +                  value,
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| +                  value->type() == CSSStyleValue::NumberType,
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| +                  value.type() == CSSStyleValue::NumberType);
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| +
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|  }  // namespace blink
 | 
|  
 | 
|  #endif
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| 
 |