Get rid of PreParserIdentifier.

src/parser.h

Index: src/parser.h
diff --git a/src/parser.h b/src/parser.h
index c1b0361980d23bdc4c3de4bf2134210e4940abcf..4fd832e978f3866c5e11daeed8f751ac0707d5af 100644
--- a/src/parser.h
+++ b/src/parser.h
@@ -364,7 +364,6 @@ class ParserTraits {
     typedef Vector<VariableProxy*> ParameterIdentifierVector;
 
     // Return types for traversing functions.
-    typedef const AstRawString* Identifier;
     typedef v8::internal::Expression* Expression;
     typedef Yield* YieldExpression;
     typedef v8::internal::FunctionLiteral* FunctionLiteral;
@@ -382,8 +381,6 @@ class ParserTraits {
   explicit ParserTraits(Parser* parser) : parser_(parser) {}
 
   // Helper functions for recursive descent.
-  bool IsEvalOrArguments(const AstRawString* identifier) const;
-  V8_INLINE bool IsFutureStrictReserved(const AstRawString* identifier) const;
 
   // Returns true if the expression is of type "this.foo".
   static bool IsThisProperty(Expression* expression);
@@ -403,10 +400,6 @@ class ParserTraits {
     return ObjectLiteral::IsBoilerplateProperty(property);
   }
 
-  static bool IsArrayIndex(const AstRawString* string, uint32_t* index) {
-    return string->AsArrayIndex(index);
-  }
-
   static Expression* GetPropertyValue(ObjectLiteral::Property* property) {
     return property->value();
   }
@@ -505,9 +498,6 @@ class ParserTraits {
                        bool is_reference_error = false);
 
   // "null" return type creators.
-  static const AstRawString* EmptyIdentifier() {
-    return NULL;
-  }
   static Expression* EmptyExpression() {
     return NULL;
   }
@@ -523,17 +513,10 @@ class ParserTraits {
     return NULL;
   }
 
-  // Non-NULL empty string.
-  V8_INLINE const AstRawString* EmptyIdentifierString();
-
   // Odd-ball literal creators.
   Literal* GetLiteralTheHole(int position, AstNodeFactory* factory);
 
   // Producing data during the recursive descent.
-  const AstRawString* GetSymbol(Scanner* scanner);
-  const AstRawString* GetNextSymbol(Scanner* scanner);
-  const AstRawString* GetNumberAsSymbol(Scanner* scanner);
-
   Expression* ThisExpression(Scope* scope, AstNodeFactory* factory,
                              int pos = RelocInfo::kNoPosition);
   Expression* SuperReference(Scope* scope, AstNodeFactory* factory,
@@ -876,23 +859,12 @@ class Parser : public ParserBase<ParserTraits> {
 };
 
 
-bool ParserTraits::IsFutureStrictReserved(
-    const AstRawString* identifier) const {
-  return parser_->scanner()->IdentifierIsFutureStrictReserved(identifier);
-}
-
-
 Scope* ParserTraits::NewScope(Scope* parent_scope, ScopeType scope_type,
                               FunctionKind kind) {
   return parser_->NewScope(parent_scope, scope_type, kind);
 }
 
 
-const AstRawString* ParserTraits::EmptyIdentifierString() {
-  return parser_->ast_value_factory()->empty_string();
-}
-
-
 void ParserTraits::SkipLazyFunctionBody(const AstRawString* function_name,
                                         int* materialized_literal_count,
                                         int* expected_property_count,