Remove CSSVariables RuntimeEnabledFeatures flag (status=stable)

third_party/WebKit/Source/core/css/parser/CSSParser.cpp

 // Copyright 2014 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 "core/css/parser/CSSParser.h"
 
 #include "core/css/CSSColorValue.h"
 #include "core/css/CSSKeyframeRule.h"
 #include "core/css/StyleColor.h"
 #include "core/css/StylePropertySet.h"
@@ skipping 60 matching lines @@
     CSSParserContext context(parserMode, nullptr);
     if (styleSheet) {
         context = styleSheet->parserContext();
         context.setMode(parserMode);
     }
     return parseValue(declaration, unresolvedProperty, string, important, context);
 }
 
 bool CSSParser::parseValueForCustomProperty(MutableStylePropertySet* declaration, const AtomicString& propertyName, const String& value, bool important, StyleSheetContents* styleSheet)
 {
-    ASSERT(RuntimeEnabledFeatures::cssVariablesEnabled() && CSSVariableParser::isValidVariableName(propertyName));
+    DCHECK(CSSVariableParser::isValidVariableName(propertyName));
     if (value.isEmpty())
         return false;
     CSSParserMode parserMode = declaration->cssParserMode();
     CSSParserContext context(parserMode, nullptr);
     if (styleSheet) {
         context = styleSheet->parserContext();
         context.setMode(parserMode);
     }
     return CSSParserImpl::parseVariableValue(declaration, propertyName, value, important, context);
 }
@@ skipping 83 matching lines @@
     builder.append(" : ");
     builder.append(propertyValue);
     builder.append("; }");
     StyleRuleBase* rule = parseRule(context, nullptr, builder.toString());
     if (!rule || !rule->isFontFaceRule())
         return nullptr;
     return toStyleRuleFontFace(rule)->properties().getPropertyCSSValue(propertyID);
 }
 
 } // namespace blink