[Interpreter] Implement ForIn in bytecode graph builder.

test/unittests/interpreter/bytecode-array-builder-unittest.cc

Index: test/unittests/interpreter/bytecode-array-builder-unittest.cc
diff --git a/test/unittests/interpreter/bytecode-array-builder-unittest.cc b/test/unittests/interpreter/bytecode-array-builder-unittest.cc
index a3463264ddeef54158e464c29cc320033be58460..22914cdd66bed0ce3149c75a6e97892b7fbf4750 100644
--- a/test/unittests/interpreter/bytecode-array-builder-unittest.cc
+++ b/test/unittests/interpreter/bytecode-array-builder-unittest.cc
@@ -209,7 +209,10 @@ TEST_F(BytecodeArrayBuilderTest, AllBytecodesGenerated) {
     .Throw()
     .Bind(&after_throw);
 
-  builder.ForInPrepare(reg).ForInDone(reg).ForInNext(reg, reg);
+  builder.ForInPrepare(reg)
+      .ForInDone(reg, reg)
+      .ForInNext(reg, reg, reg, reg)
+      .ForInStep(reg);
 
   // Wide constant pool loads
   for (int i = 0; i < 256; i++) {