[Interpreter] Add support for for..in.

src/interpreter/bytecode-array-builder.cc

Index: src/interpreter/bytecode-array-builder.cc
diff --git a/src/interpreter/bytecode-array-builder.cc b/src/interpreter/bytecode-array-builder.cc
index 26b5414b3a6b79305c066696a13cc0ef1a6622c9..6d3d66c4ec5ca5374c1a08479d37c8ab9302f3ba 100644
--- a/src/interpreter/bytecode-array-builder.cc
+++ b/src/interpreter/bytecode-array-builder.cc
@@ -645,6 +645,24 @@ BytecodeArrayBuilder& BytecodeArrayBuilder::Return() {
 }
 
 
+BytecodeArrayBuilder& BytecodeArrayBuilder::ForInPrepare() {
+  Output(Bytecode::kForInPrepare);
+  return *this;
+}
+
+
+BytecodeArrayBuilder& BytecodeArrayBuilder::ForInNext(Register for_in_state) {
+  Output(Bytecode::kForInNext, for_in_state.ToOperand());
+  return *this;
+}
+
+
+BytecodeArrayBuilder& BytecodeArrayBuilder::ForInDone(Register for_in_state) {
+  Output(Bytecode::kForInDone, for_in_state.ToOperand());
+  return *this;
+}
+
+
 BytecodeArrayBuilder& BytecodeArrayBuilder::EnterBlock() { return *this; }