[Interpreter] Add support for for..in.

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 629e4bc135e0881cc29bce59dace4d800d6e8528..cd6270ec6fdae24fd2120fb3c64251ae1fa6508c 100644
--- a/test/unittests/interpreter/bytecode-array-builder-unittest.cc
+++ b/test/unittests/interpreter/bytecode-array-builder-unittest.cc
@@ -126,6 +126,7 @@ TEST_F(BytecodeArrayBuilderTest, AllBytecodesGenerated) {
   // Emit cast operator invocations.
   builder.CastAccumulatorToNumber()
       .CastAccumulatorToBoolean()
+      .CastAccumulatorToJSObject()
       .CastAccumulatorToName();
 
   // Emit control flow. Return must be the last instruction.
@@ -136,7 +137,10 @@ TEST_F(BytecodeArrayBuilderTest, AllBytecodesGenerated) {
       .JumpIfTrue(&start)
       .JumpIfFalse(&start)
       .JumpIfToBooleanTrue(&start)
-      .JumpIfToBooleanFalse(&start);
+      .JumpIfToBooleanFalse(&start)
+      .JumpIfNull(&start)
+      .JumpIfUndefined(&start);
+
   // Insert dummy ops to force longer jumps
   for (int i = 0; i < 128; i++) {
     builder.LoadTrue();
@@ -146,12 +150,16 @@ TEST_F(BytecodeArrayBuilderTest, AllBytecodesGenerated) {
       .JumpIfTrue(&start)
       .JumpIfFalse(&start)
       .JumpIfToBooleanTrue(&start)
-      .JumpIfToBooleanFalse(&start);
+      .JumpIfToBooleanFalse(&start)
+      .JumpIfNull(&start)
+      .JumpIfUndefined(&start);
 
   builder.EnterBlock()
       .Throw()
       .LeaveBlock();
 
+  builder.ForInPrepare(reg).ForInDone(reg).ForInNext(reg, reg);
+
   builder.Return();
 
   // Generate BytecodeArray.