[Interpreter] Add support for short (16 bit) operands.

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

Index: test/unittests/interpreter/bytecode-array-iterator-unittest.cc
diff --git a/test/unittests/interpreter/bytecode-array-iterator-unittest.cc b/test/unittests/interpreter/bytecode-array-iterator-unittest.cc
index b2708562648c3c120301d27e39a8751365e38b11..26722234f39b8337b80b39c31515d9b7ca431216 100644
--- a/test/unittests/interpreter/bytecode-array-iterator-unittest.cc
+++ b/test/unittests/interpreter/bytecode-array-iterator-unittest.cc
@@ -37,6 +37,9 @@ TEST_F(BytecodeArrayIteratorTest, IteratesBytecodeArray) {
   Register reg_2 = Register::FromParameterIndex(2, builder.parameter_count());
   int feedback_slot = 97;
 
+  // TODO(rmcilroy): Add a test for a bytecode with a wide operand when
+  // the CallRuntime bytecode is landed.
+
   builder.LoadLiteral(heap_num_0)
       .LoadLiteral(heap_num_1)
       .LoadLiteral(zero)