Fix type annotation.

sdk/lib/_internal/pub/test/test_pub.dart

 // Copyright (c) 2013, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
 /// Test infrastructure for testing pub.
 ///
 /// Unlike typical unit tests, most pub tests are integration tests that stage
 /// some stuff on the file system, run pub, and then validate the results. This
 /// library provides an API to build tests like that.
 library test_pub;
@@ skipping 465 matching lines @@
   pub.writeLine("y");
 }
 
 /// Gets the absolute path to [relPath], which is a relative path in the test
 /// sandbox.
 String _pathInSandbox(String relPath) {
   return p.join(p.absolute(sandboxDir), relPath);
 }
 
 /// Gets the environment variables used to run pub in a test context.
-Map getPubTestEnvironment([Uri tokenEndpoint]) {
+Map getPubTestEnvironment([String tokenEndpoint]) {
   var environment = {};
   environment['_PUB_TESTING'] = 'true';
   environment['PUB_CACHE'] = _pathInSandbox(cachePath);
 
   // Ensure a known SDK version is set for the tests that rely on that.
   environment['_PUB_TEST_SDK_VERSION'] = "0.1.2+3";
 
   if (tokenEndpoint != null) {
-    environment['_PUB_TEST_TOKEN_ENDPOINT'] =
-      tokenEndpoint.toString();
+    environment['_PUB_TEST_TOKEN_ENDPOINT'] = tokenEndpoint.toString();
   }
 
   return environment;
 }
 
 /// Starts a Pub process and returns a [ScheduledProcess] that supports
 /// interaction with that process.
 ///
 /// Any futures in [args] will be resolved before the process is started.
-ScheduledProcess startPub({List args, Future<Uri> tokenEndpoint}) {
+ScheduledProcess startPub({List args, Future<String> tokenEndpoint}) {
   ensureDir(_pathInSandbox(appPath));
 
   // Find a Dart executable we can use to spawn. Use the same one that was
   // used to run this script itself.
   var dartBin = Platform.executable;
 
   // If the executable looks like a path, get its full path. That way we
   // can still find it when we spawn it with a different working directory.
   if (dartBin.contains(Platform.pathSeparator)) {
     dartBin = p.absolute(dartBin);
@@ skipping 451 matching lines @@
         _lastMatcher.matches(item.last, matchState);
   }
 
   Description describe(Description description) {
     return description.addAll("(", ", ", ")", [_firstMatcher, _lastMatcher]);
   }
 }
 
 /// A [StreamMatcher] that matches multiple lines of output.
 StreamMatcher emitsLines(String output) => inOrder(output.split("\n"));