Refactor class declaration logic to the parser and runtime

src/parsing/parser.h

Index: src/parsing/parser.h
diff --git a/src/parsing/parser.h b/src/parsing/parser.h
index 35711b068f92b59adc3527e61cd3936692bb8a0c..5b03c82e45fd5069be052db0a2cf53fb97cbe5f5 100644
--- a/src/parsing/parser.h
+++ b/src/parsing/parser.h
@@ -335,7 +335,6 @@ class ParserTraits {
     typedef v8::internal::Expression* Expression;
     typedef Yield* YieldExpression;
     typedef v8::internal::FunctionLiteral* FunctionLiteral;
-    typedef v8::internal::ClassLiteral* ClassLiteral;
     typedef v8::internal::Literal* Literal;
     typedef ObjectLiteral::Property* ObjectLiteralProperty;
     typedef ZoneList<v8::internal::Expression*>* ExpressionList;
@@ -581,11 +580,11 @@ class ParserTraits {
       const ParserFormalParameters& parameters, FunctionKind kind,
       FunctionLiteral::FunctionType function_type, bool* ok);
 
-  ClassLiteral* ParseClassLiteral(Type::ExpressionClassifier* classifier,
-                                  const AstRawString* name,
-                                  Scanner::Location class_name_location,
-                                  bool name_is_strict_reserved, int pos,
-                                  bool* ok);
+  Expression* ParseClassLiteral(Type::ExpressionClassifier* classifier,
+                                const AstRawString* name,
+                                Scanner::Location class_name_location,
+                                bool name_is_strict_reserved, int pos,
+                                bool* ok);
 
   V8_INLINE void MarkCollectedTailCallExpressions();
   V8_INLINE void MarkTailPosition(Expression* expression);
@@ -988,11 +987,11 @@ class Parser : public ParserBase<ParserTraits> {
       int function_token_position, FunctionLiteral::FunctionType type,
       LanguageMode language_mode, bool* ok);
 
-  ClassLiteral* ParseClassLiteral(ExpressionClassifier* classifier,
-                                  const AstRawString* name,
-                                  Scanner::Location class_name_location,
-                                  bool name_is_strict_reserved, int pos,
-                                  bool* ok);
+  Expression* ParseClassLiteral(ExpressionClassifier* classifier,
+                                const AstRawString* name,
+                                Scanner::Location class_name_location,
+                                bool name_is_strict_reserved, int pos,
+                                bool* ok);
 
   // Magical syntax support.
   Expression* ParseV8Intrinsic(bool* ok);