[Variables] Enable get/setProperty and similar APIs from the CSSOM

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 "config.h"
 #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"
 #include "core/css/StyleRule.h"
 #include "core/css/StyleSheetContents.h"
 #include "core/css/parser/CSSParserFastPaths.h"
 #include "core/css/parser/CSSParserImpl.h"
 #include "core/css/parser/CSSPropertyParser.h"
 #include "core/css/parser/CSSSelectorParser.h"
 #include "core/css/parser/CSSSupportsParser.h"
 #include "core/css/parser/CSSTokenizer.h"
+#include "core/css/parser/CSSVariableParser.h"
 #include "core/layout/LayoutTheme.h"
 
 namespace blink {
 
 bool CSSParser::parseDeclarationList(const CSSParserContext& context, MutableStylePropertySet* propertySet, const String& declaration)
 {
     return CSSParserImpl::parseDeclarationList(propertySet, declaration, context);
 }
 
 void CSSParser::parseDeclarationListForInspector(const CSSParserContext& context, const String& declaration, CSSParserObserver& observer)
@@ skipping 32 matching lines @@
     if (value)
         return declaration->setProperty(CSSProperty(resolvedProperty, value.release(), important));
     CSSParserContext context(parserMode, 0);
     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));
+    if (value.isEmpty())
+        return false;
+    CSSParserMode parserMode = declaration->cssParserMode();
+    CSSParserContext context(parserMode, 0);
+    if (styleSheet) {
+        context = styleSheet->parserContext();
+        context.setMode(parserMode);
+    }
+    return CSSParserImpl::parseVariableValue(declaration, propertyName, value, important, context);
+}
+
 bool CSSParser::parseValue(MutableStylePropertySet* declaration, CSSPropertyID unresolvedProperty, const String& string, bool important, const CSSParserContext& context)
 {
     return CSSParserImpl::parseValue(declaration, unresolvedProperty, string, important, context);
 }
 
 PassRefPtrWillBeRawPtr<CSSValue> CSSParser::parseSingleValue(CSSPropertyID propertyID, const String& string, const CSSParserContext& context)
 {
     if (string.isEmpty())
         return nullptr;
     if (RefPtrWillBeRawPtr<CSSValue> value = CSSParserFastPaths::maybeParseValue(propertyID, string, context.mode()))
@@ skipping 71 matching lines @@
     builder.appendLiteral(" : ");
     builder.append(propertyValue);
     builder.appendLiteral("; }");
     RefPtrWillBeRawPtr<StyleRuleBase> rule = parseRule(context, nullptr, builder.toString());
     if (!rule || !rule->isFontFaceRule())
         return nullptr;
     return toStyleRuleFontFace(rule.get())->properties().getPropertyCSSValue(propertyID);
 }
 
 } // namespace blink