CSS Parser: Mark on stylesheets whether the first rule was valid

Source/core/css/parser/CSSParserImpl.h

 // 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.
 
 #ifndef CSSParserImpl_h
 #define CSSParserImpl_h
 
 #include "core/CSSPropertyNames.h"
 #include "core/css/CSSProperty.h"
 #include "core/css/CSSPropertySourceData.h"
 #include "core/css/parser/CSSParserMode.h"
 #include "core/css/parser/CSSParserTokenRange.h"
 #include "platform/heap/Handle.h"
 #include "wtf/Vector.h"
 #include "wtf/text/WTFString.h"
 
 namespace blink {
 
 class StyleRule;
 class StyleRuleBase;
+class StyleRuleCharset;
 class StyleRuleFontFace;
 class StyleRuleImport;
 class StyleRuleKeyframe;
 class StyleRuleKeyframes;
 class StyleRuleMedia;
 class StyleRuleNamespace;
 class StyleRulePage;
 class StyleRuleSupports;
 class StyleRuleViewport;
 class StyleSheetContents;
@@ skipping 29 matching lines @@
 
     bool supportsDeclaration(CSSParserTokenRange&);
 
 private:
     enum RuleListType {
         TopLevelRuleList,
         RegularRuleList,
         KeyframesRuleList
     };
 
+    // Returns whether the first encountered rule was valid
     template<typename T>
-    void consumeRuleList(CSSParserTokenRange, RuleListType, T callback);
+    bool consumeRuleList(CSSParserTokenRange, RuleListType, T callback);
 
     // These two functions update the range they're given
     PassRefPtrWillBeRawPtr<StyleRuleBase> consumeAtRule(CSSParserTokenRange&, AllowedRulesType);
     PassRefPtrWillBeRawPtr<StyleRuleBase> consumeQualifiedRule(CSSParserTokenRange&, AllowedRulesType);
 
+    static PassRefPtrWillBeRawPtr<StyleRuleCharset> consumeCharsetRule(CSSParserTokenRange prelude);
     PassRefPtrWillBeRawPtr<StyleRuleImport> consumeImportRule(CSSParserTokenRange prelude);
     PassRefPtrWillBeRawPtr<StyleRuleNamespace> consumeNamespaceRule(CSSParserTokenRange prelude); // This can set m_defaultNamespace
     PassRefPtrWillBeRawPtr<StyleRuleMedia> consumeMediaRule(CSSParserTokenRange prelude, CSSParserTokenRange block);
     PassRefPtrWillBeRawPtr<StyleRuleSupports> consumeSupportsRule(CSSParserTokenRange prelude, CSSParserTokenRange block);
     PassRefPtrWillBeRawPtr<StyleRuleViewport> consumeViewportRule(CSSParserTokenRange prelude, CSSParserTokenRange block);
     PassRefPtrWillBeRawPtr<StyleRuleFontFace> consumeFontFaceRule(CSSParserTokenRange prelude, CSSParserTokenRange block);
     PassRefPtrWillBeRawPtr<StyleRuleKeyframes> consumeKeyframesRule(bool webkitPrefixed, CSSParserTokenRange prelude, CSSParserTokenRange block);
     PassRefPtrWillBeRawPtr<StyleRulePage> consumePageRule(CSSParserTokenRange prelude, CSSParserTokenRange block);
 
     PassRefPtrWillBeRawPtr<StyleRuleKeyframe> consumeKeyframeStyleRule(CSSParserTokenRange prelude, CSSParserTokenRange block);
@@ skipping 10 matching lines @@
     WillBeHeapVector<CSSProperty, 256> m_parsedProperties;
     CSSParserContext m_context;
 
     AtomicString m_defaultNamespace;
     RawPtrWillBeMember<StyleSheetContents> m_styleSheet;
 };
 
 } // namespace blink
 
 #endif // CSSParserImpl_h