Support conditional expressions in analyzer2dart.

pkg/analyzer2dart/test/end2end_test.dart

Index: pkg/analyzer2dart/test/end2end_test.dart
diff --git a/pkg/analyzer2dart/test/end2end_test.dart b/pkg/analyzer2dart/test/end2end_test.dart
index 6d2592997606a32a53a3491a6be40be4b8be4b63..8bdbfffaa2e3b25770a38453e02c4a22054ecc39 100644
--- a/pkg/analyzer2dart/test/end2end_test.dart
+++ b/pkg/analyzer2dart/test/end2end_test.dart
@@ -484,7 +484,18 @@ main(a) {
   }
 }
 ''');
+  });
 
+  test('If statement', () {
+    checkResult('''
+main(a) {
+  return a ? print(0) : print(1);
+}
+''', '''
+main(a) {
+  return a ? print(0) : print(1);
+}
+''');
   });
 }