more care around generated names, fixes #60 #82 and #97

test/codegen/names.dart

Index: test/codegen/names.dart
diff --git a/test/codegen/dir/html_input_a.dart b/test/codegen/names.dart
similarity index 64%
copy from test/codegen/dir/html_input_a.dart
copy to test/codegen/names.dart
index e38a5d76c063c1fe2593ec2cddd044c79f081c5a..127655eb24291536a36c4f8b3e1a726aef7a6873 100644
--- a/test/codegen/dir/html_input_a.dart
+++ b/test/codegen/names.dart
@@ -2,10 +2,16 @@
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
-import 'html_input_b.dart';
-import 'html_input_c.dart';
+var exports = 42;
+
+class Foo {
+  _foo() => 123;
+}
+
+_foo() => 456;
 
 main() {
-  print('fib(${x} + ${y}) = ');
-  print('  ... ${fib(x + y)}');
+  print(exports);
+  print(new Foo()._foo());
+  print(_foo());
 }