| Index: third_party/WebKit/Source/platform/exported/WebScrollbarThemeClientImpl.cpp
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| diff --git a/third_party/WebKit/Source/platform/exported/WebScrollbarThemeClientImpl.cpp b/third_party/WebKit/Source/platform/exported/WebScrollbarThemeClientImpl.cpp
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| index b4138bcd0ce4dc33b9adf5f20e341507cb5576db..165b4d1be6645ddd2ab769d59beaba590cea44b1 100644
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| --- a/third_party/WebKit/Source/platform/exported/WebScrollbarThemeClientImpl.cpp
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| +++ b/third_party/WebKit/Source/platform/exported/WebScrollbarThemeClientImpl.cpp
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| @@ -234,6 +234,26 @@ void WebScrollbarThemeClientImpl::setElasticOverscroll(float elasticOverscroll)
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|      return m_scrollbar->setElasticOverscroll(elasticOverscroll);
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|  }
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|  
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| +bool WebScrollbarThemeClientImpl::trackBackgroudNeedsRepaint() const
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| +{
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| +    return true;
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| +}
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| +
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| +void WebScrollbarThemeClientImpl::setTrackBackgroudNeedsRepaint(bool)
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| +{
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| +    ASSERT_NOT_REACHED();
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| +}
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| +
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| +bool WebScrollbarThemeClientImpl::thumbNeedsRepaint() const
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| +{
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| +    return true;
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| +}
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| +
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| +void WebScrollbarThemeClientImpl::setThumbNeedsRepaint(bool)
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| +{
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| +    ASSERT_NOT_REACHED();
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| +}
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| +
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|  DisplayItemClient WebScrollbarThemeClientImpl::displayItemClient() const
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|  {
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|      ASSERT_NOT_REACHED();
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| 
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