Change the URL-space exposed by the browser server.

test/runner/loader_test.dart

Index: test/runner/loader_test.dart
diff --git a/test/runner/loader_test.dart b/test/runner/loader_test.dart
index f5e8160848097826367189249ce2d49dfb228345..8474cbedbc4ebfa713af46b3077bce88babbd349 100644
--- a/test/runner/loader_test.dart
+++ b/test/runner/loader_test.dart
@@ -33,9 +33,10 @@ void main() {
 
 void main() {
   setUp(() {
+    _sandbox = createTempDir();
     _loader = new Loader([TestPlatform.vm],
+        root: _sandbox,
         packageRoot: p.join(packageDir, 'packages'));
-    _sandbox = createTempDir();
   });
 
   tearDown(() {
@@ -87,7 +88,7 @@ void main() {
     });
 
     test("throws a nice error if the package root doesn't exist", () {

[kevmoo, 2015/04/11 01:22:25]

This times out for me on mac

using bleeding edge SDK

-      var loader = new Loader([TestPlatform.vm]);
+      var loader = new Loader([TestPlatform.vm], root: _sandbox);
       expect(
           loader.loadFile(p.join(_sandbox, 'a_test.dart')).first
               .whenComplete(loader.close),