[Experimental] CSSSerializer Proof-of-concept

third_party/WebKit/Source/core/css/CSSSelector.h

Index: third_party/WebKit/Source/core/css/CSSSelector.h
diff --git a/third_party/WebKit/Source/core/css/CSSSelector.h b/third_party/WebKit/Source/core/css/CSSSelector.h
index c95b98d77664a8aad838ee1c1d9c90c581964461..f997e2d922b8c8b048798eeb04747acc6c956fc4 100644
--- a/third_party/WebKit/Source/core/css/CSSSelector.h
+++ b/third_party/WebKit/Source/core/css/CSSSelector.h
@@ -29,7 +29,9 @@
 #include "wtf/PassOwnPtr.h"
 
 namespace blink {
+class CSSDeserializeStream;
 class CSSSelectorList;
+class CSSSerializeStream;
 
 // This class represents a selector for a StyleRule.
 
@@ -79,6 +81,7 @@ class CORE_EXPORT CSSSelector {
 public:
     CSSSelector();
     CSSSelector(const CSSSelector&);
+    CSSSelector(CSSDeserializeStream*);
     explicit CSSSelector(const QualifiedName&, bool tagIsImplicit = false);
 
     ~CSSSelector();
@@ -287,16 +290,23 @@ public:
     bool relationIsAffectedByPseudoContent() const { return m_relationIsAffectedByPseudoContent; }
     void setRelationIsAffectedByPseudoContent() { m_relationIsAffectedByPseudoContent = true; }
 
+    void serialize(CSSSerializeStream*) const;
+
 private:
-    unsigned m_relation               : 3; // enum Relation
-    unsigned m_match                  : 4; // enum Match
-    unsigned m_pseudoType             : 8; // enum PseudoType
-    unsigned m_isLastInSelectorList   : 1;
-    unsigned m_isLastInTagHistory     : 1;
-    unsigned m_hasRareData            : 1;
-    unsigned m_isForPage              : 1;
-    unsigned m_tagIsImplicit          : 1;
-    unsigned m_relationIsAffectedByPseudoContent  : 1;
+    union {
+        struct {
+            unsigned m_relation : 3; // enum Relation
+            unsigned m_match : 4; // enum Match
+            unsigned m_pseudoType : 8; // enum PseudoType
+            unsigned m_isLastInSelectorList : 1;
+            unsigned m_isLastInTagHistory : 1;
+            unsigned m_hasRareData : 1;
+            unsigned m_isForPage : 1;
+            unsigned m_tagIsImplicit : 1;
+            unsigned m_relationIsAffectedByPseudoContent : 1;
+        };
+        unsigned m_bitfields;
+    };
 
     void setPseudoType(PseudoType pseudoType)
     {
@@ -312,11 +322,13 @@ private:
 
     struct RareData : public RefCounted<RareData> {
         static PassRefPtr<RareData> create(const AtomicString& value) { return adoptRef(new RareData(value)); }
+        static PassRefPtr<RareData> deserialize(CSSDeserializeStream*);
         ~RareData();
 
         bool matchNth(int count);
         int nthAValue() const { return m_bits.m_nth.m_a; }
         int nthBValue() const { return m_bits.m_nth.m_b; }
+        void serialize(CSSSerializeStream*);
 
         AtomicString m_matchingValue;
         AtomicString m_serializingValue;