Preliminary safari support.

lib/src/runner/browser/server.dart

Index: lib/src/runner/browser/server.dart
diff --git a/lib/src/runner/browser/server.dart b/lib/src/runner/browser/server.dart
index ca1d64de39ce19c2209f907376818fdfcc24850d..cdec66d7b7b3375b4f8b0d3e76b7e16c13f10027 100644
--- a/lib/src/runner/browser/server.dart
+++ b/lib/src/runner/browser/server.dart
@@ -31,6 +31,7 @@ import 'dartium.dart';
 import 'content_shell.dart';
 import 'firefox.dart';
 import 'phantom_js.dart';
+import 'safari.dart';
 
 /// A server that serves JS-compiled tests to browsers.
 ///
@@ -367,6 +368,7 @@ void main() {
       case TestPlatform.chrome: return new Chrome(url);
       case TestPlatform.phantomJS: return new PhantomJS(url);
       case TestPlatform.firefox: return new Firefox(url);
+      case TestPlatform.safari: return new Safari(url);
       default:
         throw new ArgumentError("$browser is not a browser.");
     }