[Interpreter] Add support for JS calls.

test/unittests/compiler/interpreter-assembler-unittest.cc

Index: test/unittests/compiler/interpreter-assembler-unittest.cc
diff --git a/test/unittests/compiler/interpreter-assembler-unittest.cc b/test/unittests/compiler/interpreter-assembler-unittest.cc
index 9e6eff36da58dfc7311ec146b20affed628733de..e384df70af1589fe9aed5188cd16c101c39d4571 100644
--- a/test/unittests/compiler/interpreter-assembler-unittest.cc
+++ b/test/unittests/compiler/interpreter-assembler-unittest.cc
@@ -185,6 +185,9 @@ TARGET_TEST_F(InterpreterAssemblerTest, BytecodeOperand) {
     int number_of_operands = interpreter::Bytecodes::NumberOfOperands(bytecode);
     for (int i = 0; i < number_of_operands; i++) {
       switch (interpreter::Bytecodes::GetOperandType(bytecode, i)) {
+        case interpreter::OperandType::kCount:
+          EXPECT_THAT(m.BytecodeOperandCount(i), m.IsBytecodeOperand(i));
+          break;
         case interpreter::OperandType::kIdx:
           EXPECT_THAT(m.BytecodeOperandIdx(i), m.IsBytecodeOperand(i));
           break;