Remove config.h inclusion from third_party/WebKit/Source/core/.

third_party/WebKit/Source/core/style/StyleVariableData.cpp

 // Copyright 2015 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
-#include "config.h"
 #include "core/style/StyleVariableData.h"
 
 #include "core/style/DataEquivalency.h"
 
 namespace blink {
 
 bool StyleVariableData::operator==(const StyleVariableData& other) const
 {
     if (m_data.size() != other.m_data.size()) {
         return false;
     }
 
     for (const auto& iter : m_data) {
         RefPtr<CSSVariableData> otherData = other.m_data.get(iter.key);
         if (!dataEquivalent(iter.value, otherData))
             return false;
     }
 
     return true;
 }
 
 } // namespace blink