dart2dart: Test cases for better code coverage in dart_tree rewritings.

tests/language/rewrite_nested_if3_test.dart

Index: tests/language/rewrite_nested_if3_test.dart
diff --git a/tests/language/if_flatten2_test.dart b/tests/language/rewrite_nested_if3_test.dart
similarity index 97%
rename from tests/language/if_flatten2_test.dart
rename to tests/language/rewrite_nested_if3_test.dart
index 0cc11922641ff6cf2fffbb777b6effb56406bed9..a9fd16f035726b176a00da483b081b3de8a47c70 100644
--- a/tests/language/if_flatten2_test.dart
+++ b/tests/language/rewrite_nested_if3_test.dart
@@ -4,12 +4,15 @@
 
 import 'package:expect/expect.dart';
 
+baz() {}
+
 check_true_true(x, y) {
   if (x) {
     if (y) {
       return true;
     }
   }
+  baz();
   return false;
 }
 
@@ -21,6 +24,7 @@ check_false_true(x, y) {
       return true;
     }
   }
+  baz();
   return false;
 }
 
@@ -32,6 +36,7 @@ check_true_false(x, y) {
       return true;
     }
   }
+  baz();
   return false;
 }
 
@@ -45,6 +50,7 @@ check_false_false(x, y) {
       return true;
     }
   }
+  baz();
   return false;
 }