NOT FOR LANDING: Hack up CSSParser for speed.

third_party/WebKit/Source/core/css/CSSVariableData.h

 // 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.
 
 #ifndef CSSVariableData_h
 #define CSSVariableData_h
 
 #include "core/css/StylePropertySet.h"
 #include "core/css/parser/CSSParserToken.h"
 #include "core/css/parser/CSSParserTokenRange.h"
@@ skipping 12 matching lines @@
     static PassRefPtr<CSSVariableData> create(const CSSParserTokenRange& range, bool needsVariableResolution = true)
     {
         return adoptRef(new CSSVariableData(range, needsVariableResolution));
     }
 
     static PassRefPtr<CSSVariableData> createResolved(const Vector<CSSParserToken>& resolvedTokens, const CSSVariableData& unresolvedData)
     {
         return adoptRef(new CSSVariableData(resolvedTokens, unresolvedData.m_backingString));
     }
 
-    CSSParserTokenRange tokenRange() { return m_tokens; }
+    const CSSParserTokenRange tokenRange() const { return CSSParserTokenRange(m_tokens.begin(), m_tokens.end()); }
 
     const Vector<CSSParserToken>& tokens() const { return m_tokens; }
 
     bool operator==(const CSSVariableData& other) const;
 
     bool needsVariableResolution() const { return m_needsVariableResolution; }
 
     StylePropertySet* propertySet();
 
 private:
@@ skipping 18 matching lines @@
     const bool m_needsVariableResolution;
 
     // Parsed representation for @apply
     bool m_cachedPropertySet;
     Persistent<StylePropertySet> m_propertySet;
 };
 
 } // namespace blink
 
 #endif // CSSVariableData_h