samples/poppopwin: upgrade to first-class sample

samples/third_party/pop-pop-win/lib/html.dart

Index: samples/third_party/pop-pop-win/lib/html.dart
diff --git a/samples/third_party/pop-pop-win/lib/html.dart b/samples/third_party/pop-pop-win/lib/html.dart
deleted file mode 100644
index 05ce166168d1b91b3e13c1387f9f2f5173f2cb07..0000000000000000000000000000000000000000
--- a/samples/third_party/pop-pop-win/lib/html.dart
+++ /dev/null
@@ -1,29 +0,0 @@
-library ppw_html;
-
-import 'dart:async';
-import 'dart:html';
-import 'package:bot/bot.dart';
-import 'poppopwin.dart';
-import 'platform_target.dart';
-
-part 'src/html/high_score_view.dart';
-part 'src/html/game_view.dart';
-part 'src/html/game_storage.dart';
-part 'src/html/game_manager.dart';
-
-PlatformTarget _platformImpl;
-
-void initPlatform(PlatformTarget value) {
-  assert(value != null);
-  assert(!value.initialized);
-  assert(_platformImpl == null);
-  _platformImpl = value;
-  _platformImpl.initialize();
-}
-
-PlatformTarget get targetPlatform {
-  if(_platformImpl == null) {
-    initPlatform(new PlatformTarget());
-  }
-  return _platformImpl;
-}