[es6] emit error when for-in loop declarations are initialized in strict mode

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"  // TODO(titzer): remove this include dependency
@@ skipping 891 matching lines @@
   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);
   Block* ParseVariableDeclarations(VariableDeclarationContext var_context,
-                                   VariableDeclarationProperties* decl_props,
                                    ZoneList<const AstRawString*>* names,
                                    const AstRawString** out,
+                                   Scanner::Location* first_initializer_loc,
                                    bool* ok);
   Statement* ParseExpressionOrLabelledStatement(
       ZoneList<const AstRawString*>* labels, bool* ok);
   IfStatement* ParseIfStatement(ZoneList<const AstRawString*>* labels,
                                 bool* ok);
   Statement* ParseContinueStatement(bool* ok);
   Statement* ParseBreakStatement(ZoneList<const AstRawString*>* labels,
                                  bool* ok);
   Statement* ParseReturnStatement(bool* ok);
   Statement* ParseWithStatement(ZoneList<const AstRawString*>* labels,
@@ skipping 197 matching lines @@
 }
 
 
 Expression* ParserTraits::CloseTemplateLiteral(TemplateLiteralState* state,
                                                int start, Expression* tag) {
   return parser_->CloseTemplateLiteral(state, start, tag);
 }
 } }  // namespace v8::internal
 
 #endif  // V8_PARSER_H_