Additional clean-up after moving to the new task model; a breaking change needed to allow a bug to …

pkg/analyzer/lib/instrumentation/instrumentation.dart

 // Copyright (c) 2014, 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 instrumentation;
 
 import 'dart:async';
 import 'dart:convert';
 
 import 'package:analyzer/task/model.dart';
@@ skipping 86 matching lines @@
 
   /**
    * The current time, expressed as a decimal encoded number of milliseconds.
    */
   String get _timestamp => new DateTime.now().millisecondsSinceEpoch.toString();
 
   /**
    * Log that the given analysis [task] is being performed in the given
    * [context].
    */
-  void logAnalysisTask(String context, dynamic task) {
-    // TODO(brianwilkerson) When the old task model is removed, change the
-    // parameter type to AnalysisTask.
+  void logAnalysisTask(String context, AnalysisTask task) {
     if (_instrumentationServer != null) {
       String description =
           (task is AnalysisTask) ? task.description : task.toString();
       _instrumentationServer
           .log(_join([TAG_ANALYSIS_TASK, context, description]));
     }
   }
 
   /**
    * Log the fact that an error, described by the given [message], has occurred.
@@ skipping 253 matching lines @@
     }
   }
 
   @override
   Future shutdown() async {
     for (InstrumentationServer server in _servers) {
       await server.shutdown();
     }
   }
 }