Remove CSSVariables RuntimeEnabledFeatures flag (status=stable)

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. (http://www.torchmobile.com/)
  * Copyright (c) 2011, Code Aurora Forum. All rights reserved.
@@ skipping 89 matching lines @@
         return true;
     default:
         return false;
     }
 }
 
 } // namespace
 
 void StyleBuilder::applyProperty(CSSPropertyID id, StyleResolverState& state, const CSSValue& value)
 {
-    if (RuntimeEnabledFeatures::cssVariablesEnabled() && id != CSSPropertyVariable
+    if (id != CSSPropertyVariable
         && (value.isVariableReferenceValue() || value.isPendingSubstitutionValue())) {
 
         const CSSValue* resolvedValue = value.isVariableReferenceValue() ?
             CSSVariableResolver::resolveVariableReferences(state, id, toCSSVariableReferenceValue(value)) :
             CSSVariableResolver::resolvePendingSubstitutions(state, id, toCSSPendingSubstitutionValue(value));
         applyProperty(id, state, *resolvedValue);
 
         if (!state.style()->hasVariableReferenceFromNonInheritedProperty() && !CSSPropertyMetadata::isInheritedProperty(id))
             state.style()->setHasVariableReferenceFromNonInheritedProperty();
         return;
@@ skipping 737 matching lines @@
     }
 }
 
 void StyleBuilderFunctions::applyInheritCSSPropertyPosition(StyleResolverState& state)
 {
     if (!state.parentNode()->isDocumentNode())
         state.style()->setPosition(state.parentStyle()->position());
 }
 
 } // namespace blink