CSS Lazy Parsing perf jobs

third_party/WebKit/Source/core/css/parser/CSSParserImpl.h

Index: third_party/WebKit/Source/core/css/parser/CSSParserImpl.h
diff --git a/third_party/WebKit/Source/core/css/parser/CSSParserImpl.h b/third_party/WebKit/Source/core/css/parser/CSSParserImpl.h
index 13d99b03f8a4ae5796bd928193bed069250137ea..cfa2673f4f0f7823365c8d6d97a5692b3ac77c46 100644
--- a/third_party/WebKit/Source/core/css/parser/CSSParserImpl.h
+++ b/third_party/WebKit/Source/core/css/parser/CSSParserImpl.h
@@ -41,7 +41,9 @@ class CSSParserImpl {
   WTF_MAKE_NONCOPYABLE(CSSParserImpl);
 
  public:
-  CSSParserImpl(const CSSParserContext&, StyleSheetContents* = nullptr);
+  CSSParserImpl(const CSSParserContext&,
+                StyleSheetContents* = nullptr,
+                bool deferPropertyParsing = false);
 
   enum AllowedRulesType {
     // As per css-syntax, css-cascade and css-namespaces, @charset rules
@@ -80,7 +82,8 @@ class CSSParserImpl {
                                   AllowedRulesType);
   static void parseStyleSheet(const String&,
                               const CSSParserContext&,
-                              StyleSheetContents*);
+                              StyleSheetContents*,
+                              bool deferPropertyParsing = false);
   static CSSSelectorList parsePageSelector(CSSParserTokenRange,
                                            StyleSheetContents*);
 
@@ -147,6 +150,18 @@ class CSSParserImpl {
   static std::unique_ptr<Vector<double>> consumeKeyframeKeyList(
       CSSParserTokenRange);
 
+  static std::unique_ptr<DeferredPropertiesClosure>
+  createDeferredPropertiesClosure(CSSParserTokenRange,
+                                  const CSSParserContext&,
+                                  UseCounter*);
+
+  static StylePropertySet* parseDeclarationListForLazyStyle(
+      CSSParserTokenRange,
+      const CSSParserContext*,
+      UseCounter*);
+
+  static bool shouldLazilyParseProperties(const CSSSelectorList& selectors);
+
   // FIXME: Can we build StylePropertySets directly?
   // FIXME: Investigate using a smaller inline buffer
   HeapVector<CSSProperty, 256> m_parsedProperties;
@@ -156,6 +171,8 @@ class CSSParserImpl {
 
   // For the inspector
   CSSParserObserverWrapper* m_observerWrapper;
+
+  bool m_deferPropertyParsing;
 };
 
 }  // namespace blink