Implement ParseExportDeclaration per latest ES6 spec draft

src/parser.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_PARSER_H_
 #define V8_PARSER_H_
 
 #include "src/allocation.h"
 #include "src/ast.h"
 #include "src/compiler.h"  // For CachedDataMode
@@ skipping 733 matching lines @@
 
   // All ParseXXX functions take as the last argument an *ok parameter
   // which is set to false if parsing failed; it is unchanged otherwise.
   // By making the 'exception handling' explicit, we are forced to check
   // for failure at the call sites.
   void* ParseStatementList(ZoneList<Statement*>* processor, int end_token,
                            bool is_eval, Scope** ad_hoc_eval_scope, bool* ok);
   Statement* ParseStatementListItem(bool* ok);
   Module* ParseModule(bool* ok);
   Statement* ParseModuleItem(bool* ok);
-  Module* ParseModuleUrl(bool* ok);
+  Module* ParseModuleSpecifier(bool* ok);
   Statement* ParseImportDeclaration(bool* ok);
   Statement* ParseExportDeclaration(bool* ok);
+  Statement* ParseExportDefault(bool* ok);
+  void* ParseModuleDeclarationClause(ZoneList<const AstRawString*>* names,
+                                     bool* ok);
   Statement* ParseStatement(ZoneList<const AstRawString*>* labels, bool* ok);
   Statement* ParseFunctionDeclaration(ZoneList<const AstRawString*>* names,
                                       bool* ok);
   Statement* ParseClassDeclaration(ZoneList<const AstRawString*>* names,
                                    bool* ok);
   Statement* ParseNativeDeclaration(bool* ok);
   Block* ParseBlock(ZoneList<const AstRawString*>* labels, bool* ok);
   Block* ParseVariableStatement(VariableDeclarationContext var_context,
                                 ZoneList<const AstRawString*>* names,
                                 bool* ok);
@@ skipping 223 matching lines @@
 }
 
 
 Expression* ParserTraits::CloseTemplateLiteral(TemplateLiteralState* state,
                                                int start, Expression* tag) {
   return parser_->CloseTemplateLiteral(state, start, tag);
 }
 } }  // namespace v8::internal
 
 #endif  // V8_PARSER_H_