[Interpreter] Add support for for..in.

src/interpreter/bytecode-generator.h

Index: src/interpreter/bytecode-generator.h
diff --git a/src/interpreter/bytecode-generator.h b/src/interpreter/bytecode-generator.h
index c153188ef026fbd0b828dad87402311f6d6d39ff..b42311b19424b4901e58dbacb43822042b58e38b 100644
--- a/src/interpreter/bytecode-generator.h
+++ b/src/interpreter/bytecode-generator.h
@@ -78,6 +78,7 @@ class BytecodeGenerator : public AstVisitor {
   void VisitObjectLiteralAccessor(Register home_object,
                                   ObjectLiteralProperty* property,
                                   Register value_out);
+  void VisitForInAssignment(Expression* expr, FeedbackVectorSlot slot);
 
 
   // Visitors for obtaining expression result in the accumulator, in a