Make CSSValuePool thread local to ensure correct parsing in colors on workers

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 114 matching lines @@
     return toStyleRuleKeyframe(keyframe.get());
 }
 
 bool CSSParser::parseSupportsCondition(const String& condition)
 {
     CSSTokenizer::Scope scope(condition);
     CSSParserImpl parser(strictCSSParserContext());
     return CSSSupportsParser::supportsCondition(scope.tokenRange(), parser) == CSSSupportsParser::Supported;
 }
 
-bool CSSParser::parseColor(Color& color, const String& string, bool strict)
+bool CSSParser::parseColor(Color& color, const String& string, CSSValuePool* localCssValuePool, bool strict)
 {
     if (string.isEmpty())
         return false;
 
     // The regular color parsers don't resolve named colors, so explicitly
     // handle these first.
     Color namedColor;
     if (namedColor.setNamedColor(string)) {
         color = namedColor;
         return true;
     }
 
-    RawPtr<CSSValue> value = CSSParserFastPaths::parseColor(string, strict ? HTMLStandardMode : HTMLQuirksMode);
+    RawPtr<CSSValue> value;
+    if (!localCssValuePool) {
+        value = CSSParserFastPaths::parseColor(string, strict ? HTMLStandardMode : HTMLQuirksMode, &cssValuePool());
+    } else {
+        value = CSSParserFastPaths::parseColor(string, strict ? HTMLStandardMode : HTMLQuirksMode, localCssValuePool);
+    }
+
     // TODO(timloh): Why is this always strict mode?
     if (!value)
         value = parseSingleValue(CSSPropertyColor, string, strictCSSParserContext());
 
     if (!value || !value->isColorValue())
         return false;
     color = toCSSColorValue(*value).value();
     return true;
 }
 
@@ skipping 17 matching lines @@
     builder.appendLiteral(" : ");
     builder.append(propertyValue);
     builder.appendLiteral("; }");
     RawPtr<StyleRuleBase> rule = parseRule(context, nullptr, builder.toString());
     if (!rule || !rule->isFontFaceRule())
         return nullptr;
     return toStyleRuleFontFace(rule.get())->properties().getPropertyCSSValue(propertyID);
 }
 
 } // namespace blink