Add a "pub global run" command.

sdk/lib/_internal/pub/test/run/displays_transformer_logs_test.dart

Index: sdk/lib/_internal/pub/test/run/displays_transformer_logs_test.dart
diff --git a/sdk/lib/_internal/pub/test/run/displays_transformer_logs_test.dart b/sdk/lib/_internal/pub/test/run/displays_transformer_logs_test.dart
index d47b9501fa52248b026f38fa236a50aa56189116..1b3fd2abae0261c26394bd306be0b0e5b01db5b6 100644
--- a/sdk/lib/_internal/pub/test/run/displays_transformer_logs_test.dart
+++ b/sdk/lib/_internal/pub/test/run/displays_transformer_logs_test.dart
@@ -6,7 +6,6 @@ import 'package:scheduled_test/scheduled_test.dart';
 
 import '../descriptor.dart' as d;
 import '../test_pub.dart';
-import 'utils.dart';
 
 const SCRIPT = """
 import "package:myapp/lib.dart";
@@ -69,8 +68,7 @@ main() {
 
       createLockFile('myapp', pkg: ['barback']);
 
-      var pub = pubRun(args: ["script"],
-          transformers: ["myapp/src/transformer"]);
+      var pub = pubRun(args: ["script"]);
 
       // Note that the info log is only displayed here because the test
       // harness runs pub in verbose mode. By default, only the warning would