Switch from DRT to content shell.

tools/testing/dart/drt_updater.dart

Index: tools/testing/dart/drt_updater.dart
diff --git a/tools/testing/dart/drt_updater.dart b/tools/testing/dart/drt_updater.dart
index 67e1716c454f2be77497ffa994bf79b8e6c3c6e5..7a0c9c92490b7651df30225c76c3eae9bcee6be8 100644
--- a/tools/testing/dart/drt_updater.dart
+++ b/tools/testing/dart/drt_updater.dart
@@ -60,18 +60,18 @@ class _DartiumUpdater {
   }
 }
 
-_DartiumUpdater _dumpRenderTreeUpdater;
+_DartiumUpdater _contentShellUpdater;
 _DartiumUpdater _dartiumUpdater;
 
 _DartiumUpdater runtimeUpdater(Map configuration) {
   String runtime = configuration['runtime'];
   if (runtime == 'drt' && configuration['drt'] == '') {
-    // Download the default DumpRenderTree from Google Storage.
-    if (_dumpRenderTreeUpdater == null) {
-      _dumpRenderTreeUpdater = new _DartiumUpdater('DumpRenderTree',
-                                                   'get_archive.py', 'drt');
+    // Download the default content shell from Google Storage.
+    if (_contentShellUpdater == null) {
+      _contentShellUpdater = new _DartiumUpdater('Content Shell',
+                                                 'get_archive.py', 'drt');
     }
-    return _dumpRenderTreeUpdater;
+    return _contentShellUpdater;
   } else if (runtime == 'dartium' && configuration['dartium'] == '') {
     // Download the default Dartium from Google Storage.
     if (_dartiumUpdater == null) {