Make CSSVariableResolver's interface object based instead of static functions

third_party/WebKit/Source/core/css/resolver/StyleBuilderCustom.cpp

 /*
  * Copyright (C) 2013 Google Inc. All rights reserved.
  * Copyright (C) 1999 Lars Knoll (knoll@kde.org)
  *           (C) 2004-2005 Allan Sandfeld Jensen (kde@carewolf.com)
  * Copyright (C) 2006, 2007 Nicholas Shanks (webkit@nickshanks.com)
  * Copyright (C) 2005, 2006, 2007, 2008, 2009, 2010, 2011, 2012, 2013 Apple Inc.
  * All rights reserved.
  * Copyright (C) 2007 Alexey Proskuryakov <ap@webkit.org>
  * Copyright (C) 2007, 2008 Eric Seidel <eric@webkit.org>
  * Copyright (C) 2008, 2009 Torch Mobile Inc. All rights reserved.
@@ skipping 101 matching lines @@
 }  // namespace
 
 void StyleBuilder::ApplyProperty(CSSPropertyID id,
                                  StyleResolverState& state,
                                  const CSSValue& value) {
   if (id != CSSPropertyVariable && (value.IsVariableReferenceValue() ||
                                     value.IsPendingSubstitutionValue())) {
     bool omit_animation_tainted =
         CSSAnimations::IsAnimationAffectingProperty(id);
     const CSSValue* resolved_value =
-        CSSVariableResolver::ResolveVariableReferences(state, id, value,
-                                                       omit_animation_tainted);
+        CSSVariableResolver(state).ResolveVariableReferences(
+            id, value, omit_animation_tainted);
     ApplyProperty(id, state, *resolved_value);
 
     if (!state.Style()->HasVariableReferenceFromNonInheritedProperty() &&
         !CSSPropertyMetadata::IsInheritedProperty(id))
       state.Style()->SetHasVariableReferenceFromNonInheritedProperty();
     return;
   }
 
   DCHECK(!isShorthandProperty(id)) << "Shorthand property id = " << id
                                    << " wasn't expanded at parsing time";
@@ skipping 853 matching lines @@
     state.Style()->SetCaretColor(
         StyleBuilderConverter::ConvertStyleAutoColor(state, value));
   }
   if (state.ApplyPropertyToVisitedLinkStyle()) {
     state.Style()->SetVisitedLinkCaretColor(
         StyleBuilderConverter::ConvertStyleAutoColor(state, value, true));
   }
 }
 
 }  // namespace blink