Start cleaning up the HTML tests.

pkg/dev_compiler/tool/build_test_pkgs.sh

Index: pkg/dev_compiler/tool/build_test_pkgs.sh
diff --git a/pkg/dev_compiler/tool/build_test_pkgs.sh b/pkg/dev_compiler/tool/build_test_pkgs.sh
index 5b348e2a56e3e5527cbefc431ebf5c780176b591..fd019bc0dea7db673e12a21d6786998236644747 100755
--- a/pkg/dev_compiler/tool/build_test_pkgs.sh
+++ b/pkg/dev_compiler/tool/build_test_pkgs.sh
@@ -15,6 +15,10 @@ SDK=--dart-sdk-summary=lib/js/amd/dart_sdk.sum
     --url-mapping=package:async_helper/async_helper.dart,test/codegen/async_helper.dart \

[vsm, 2016/10/12 22:29:46]

This too actually.

[Bob Nystrom, 2016/10/13 00:12:12]

It looks like dev_compiler's version of async_helper is a little different from
the pkg/async_helper one. The latter is doing something with a ReceivePort. If
it's OK with you, I'll put off unforking them for now.

     package:async_helper/async_helper.dart
 
+./bin/dartdevc.dart $SDK -o gen/codegen_output/pkg/minitest.js \
+    --url-mapping=package:minitest/minitest.dart,test/codegen/minitest.dart \
+    package:minitest/minitest.dart
+
 ./bin/dartdevc.dart $SDK -o gen/codegen_output/pkg/js.js \
     package:js/js.dart