Support for inlining small methods (independent of they're called inside a loop or not)

tests/language/recursive_calls_test.dart

Index: tests/language/recursive_calls_test.dart
diff --git a/tests/compiler/dart2js_native/is_check_test.dart b/tests/language/recursive_calls_test.dart
similarity index 72%
copy from tests/compiler/dart2js_native/is_check_test.dart
copy to tests/language/recursive_calls_test.dart
index db045025b43c3a74fcc4bfe3f987650a3a66db7e..9a44ea6401adcd6a236707a360fca1218c00fd04 100644
--- a/tests/compiler/dart2js_native/is_check_test.dart
+++ b/tests/language/recursive_calls_test.dart
@@ -4,9 +4,10 @@
 
 import "package:expect/expect.dart";
 
-class A native "A" {}
+int bar(x) => foo(x+1);
+int foo(x) => x > 9 ? x : bar(x);
 
 main() {
-  var a = [new Object()];
-  Expect.isFalse(a[0] is A);
+  Expect.equals(foo(int.parse("1")), 10);
 }
+