anchor.diff:      x.foo(2, 10);
       return x.foo(3, 10, 30);
     }
  +  @NoInline()
     method2() {
       g = '(Method2Tag)';
       A x = makeA();
  
positive.code: // number of arguments in the call site AND the call site is inlined.
  
  import "package:expect/expect.dart";
  
  typedef int Int2Int(int x);
  
  
negative.code: 
  class B {
    static var g;
    @NoInline()
    method1(a) {
      g = '(Method1Tag)';  // Tag to identify compiled JavaScript method.
      A x = makeA();
  