Add support for static calls to the cps pipeline code generator.

tests/compiler/dart2js/js_backend_cps_ir_test.dart

Index: tests/compiler/dart2js/js_backend_cps_ir_test.dart
diff --git a/tests/compiler/dart2js/js_backend_cps_ir_test.dart b/tests/compiler/dart2js/js_backend_cps_ir_test.dart
index 80398fe41c7498ac62d14768b7771079877d537c..ed91d0079ff2fa321e89e3e05dff15d0ca5f4864 100644
--- a/tests/compiler/dart2js/js_backend_cps_ir_test.dart
+++ b/tests/compiler/dart2js/js_backend_cps_ir_test.dart
@@ -16,6 +16,10 @@ const String TEST_MAIN_FILE = 'test.dart';
 
 /// The list of tests to run.
 const List<String> RAW_TESTS = const [
+  """
+  foo() { return 42; }
+  main() { return foo(); }
+  """,
   "main() {}",
   "main() { return 42; }",
 ];