Add parsing for type aliases

src/parsing/preparser.h

 // Copyright 2012 the V8 project 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 V8_PARSING_PREPARSER_H
 #define V8_PARSING_PREPARSER_H
 
 #include "src/ast/scopes.h"
 #include "src/bailout-reason.h"
 #include "src/hashmap.h"
@@ skipping 654 matching lines @@
                                  PreParserExpressionList arguments,
                                  int pos) {
     return PreParserExpression::Default();
   }
   PreParserExpression NewCallRuntime(const AstRawString* name,
                                      const Runtime::Function* function,
                                      PreParserExpressionList arguments,
                                      int pos) {
     return PreParserExpression::Default();
   }
+  PreParserStatement NewEmptyStatement(int pos) {
+    return PreParserStatement::Default();
+  }
   PreParserStatement NewReturnStatement(PreParserExpression expression,
                                         int pos) {
     return PreParserStatement::Default();
   }
   PreParserExpression NewFunctionLiteral(
       PreParserIdentifier name, Scope* scope, PreParserStatementList body,
       int materialized_literal_count, int expected_property_count,
       int parameter_count,
       FunctionLiteral::ParameterFlag has_duplicate_parameters,
       FunctionLiteral::FunctionType function_type,
@@ skipping 157 matching lines @@
     typedef PreParserExpression Expression;
     typedef PreParserExpression YieldExpression;
     typedef PreParserExpression FunctionLiteral;
     typedef PreParserExpression ClassLiteral;
     typedef PreParserExpression ObjectLiteralProperty;
     typedef PreParserExpression Literal;
     typedef PreParserExpressionList ExpressionList;
     typedef PreParserExpressionList PropertyList;
     typedef PreParserIdentifier FormalParameter;
     typedef PreParserFormalParameters FormalParameters;
+    typedef PreParserStatement Statement;
     typedef PreParserStatementList StatementList;
 
     struct TypeSystem {
       typedef typesystem::PreParserType Type;
       typedef typesystem::PreParserTypeList TypeList;
       typedef typesystem::PreParserTypeParameter TypeParameter;
       typedef typesystem::PreParserTypeParameters TypeParameters;
       typedef typesystem::PreParserFormalParameter FormalParameter;
       typedef typesystem::PreParserFormalParameters FormalParameters;
       typedef typesystem::PreParserTypeMember TypeMember;
@@ skipping 619 matching lines @@
     const PreParserFormalParameters& parameters, FunctionKind kind,
     FunctionLiteral::FunctionType function_type, bool* ok) {
   return pre_parser_->ParseEagerFunctionBody(function_name, pos, parameters,
                                              kind, function_type, ok);
 }
 
 }  // namespace internal
 }  // namespace v8
 
 #endif  // V8_PARSING_PREPARSER_H