Add analytics to analyzer-cli and analysis server.

pkg/analyzer_cli/lib/starter.dart

 // Copyright (c) 2016, 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.
 
 library analyzer_cli.starter;
 
+import 'dart:async';
+
 import 'package:analyzer/plugin/resolver_provider.dart';
 import 'package:analyzer_cli/src/driver.dart';
 import 'package:plugin/plugin.dart';
 
 /**
  * An object that can be used to start a command-line analysis. This class
  * exists so that clients can configure a command-line analyzer before starting
  * it.
  *
  * Clients may not extend, implement or mix-in this class.
@@ skipping 12 matching lines @@
   void set packageResolverProvider(ResolverProvider provider);
 
   /**
    * Set the [plugins] that are defined outside the analyzer_cli package.
    */
   void set userDefinedPlugins(List<Plugin> plugins);
 
   /**
    * Use the given command-line [arguments] to start this analyzer.
    */
-  void start(List<String> arguments);
+  Future<Null> start(List<String> arguments);
 }