[Interpreter] Add SetPendingMessage bytecode.

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 999490518e0584520e083dbf8b6819ac1a79e347..9be82b566f74c6e53bfb09bfda99ee5d58c8c7f4 100644
--- a/test/unittests/interpreter/bytecode-array-builder-unittest.cc
+++ b/test/unittests/interpreter/bytecode-array-builder-unittest.cc
@@ -258,6 +258,9 @@ TEST_F(BytecodeArrayBuilderTest, AllBytecodesGenerated) {
         .Bind(&after_jump2);
   }
 
+  // Emit set pending message bytecode.
+  builder.SetPendingMessage();
+
   // Emit stack check bytecode.
   builder.StackCheck(0);