[Interpreter] Implement ForIn in bytecode graph builder.

src/interpreter/bytecode-generator.h

 // Copyright 2015 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_INTERPRETER_BYTECODE_GENERATOR_H_
 #define V8_INTERPRETER_BYTECODE_GENERATOR_H_
 
 #include "src/ast/ast.h"
 #include "src/interpreter/bytecode-array-builder.h"
 #include "src/interpreter/bytecodes.h"
@@ skipping 98 matching lines @@
   void VisitNewLocalFunctionContext();
   void VisitBuildLocalActivationContext();
   void VisitNewLocalBlockContext(Scope* scope);
   void VisitFunctionClosureForContext();
   void VisitSetHomeObject(Register value, Register home_object,
                           ObjectLiteralProperty* property, int slot_number = 0);
   void VisitObjectLiteralAccessor(Register home_object,
                                   ObjectLiteralProperty* property,
                                   Register value_out);
   void VisitForInAssignment(Expression* expr, FeedbackVectorSlot slot);
+  void GetForInPreparedItem(Register destination, int index,
+                            Register prepare_result, Register scratch);
 
   // Visitors for obtaining expression result in the accumulator, in a
   // register, or just getting the effect.
   void VisitForAccumulatorValue(Expression* expression);
   MUST_USE_RESULT Register VisitForRegisterValue(Expression* expression);
   void VisitForEffect(Expression* node);
 
   // Methods for tracking and remapping register.
   void RecordStoreToRegister(Register reg);
   Register LoadFromAliasedRegister(Register reg);
@@ skipping 39 matching lines @@
   ContextScope* execution_context_;
   ExpressionResultScope* execution_result_;
   AssignmentHazardHelper assignment_hazard_helper_;
 };
 
 }  // namespace interpreter
 }  // namespace internal
 }  // namespace v8
 
 #endif  // V8_INTERPRETER_BYTECODE_GENERATOR_H_