Start making server strong mode clean

pkg/analysis_server/test/integration/integration_tests.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 test.integration.analysis;
 
 import 'dart:async';
 import 'dart:collection';
 import 'dart:convert';
 import 'dart:io';
@@ skipping 386 matching lines @@
   /**
    * Server process object, or null if server hasn't been started yet.
    */
   Process _process = null;
 
   /**
    * Commands that have been sent to the server but not yet acknowledged, and
    * the [Completer] objects which should be completed when acknowledgement is
    * received.
    */
-  final HashMap<String, Completer> _pendingCommands = <String, Completer>{};
+  final Map<String, Completer> _pendingCommands = <String, Completer>{};
 
   /**
    * Number which should be used to compute the 'id' to send in the next command
    * sent to the server.
    */
   int _nextId = 0;
 
   /**
    * Messages which have been exchanged with the server; we buffer these
    * up until the test finishes, so that they can be examined in the debugger
@@ skipping 419 matching lines @@
               mismatchDescription.add('; ').add(subDescription);
         }
         return mismatchDescription.add(')');
       });
     }
   }
 
   @override
   Description describeMismatch(
       item, Description mismatchDescription, Map matchState, bool verbose) {
-    List<MismatchDescriber> mismatches = matchState['mismatches'];
+    List<MismatchDescriber> mismatches =
+        matchState['mismatches'] as List<MismatchDescriber>;
     if (mismatches != null) {
       for (int i = 0; i < mismatches.length; i++) {
         MismatchDescriber mismatch = mismatches[i];
         if (i > 0) {
           if (mismatches.length == 2) {
             mismatchDescription = mismatchDescription.add(' and ');
           } else if (i == mismatches.length - 1) {
             mismatchDescription = mismatchDescription.add(', and ');
           } else {
             mismatchDescription = mismatchDescription.add(', ');
@@ skipping 27 matching lines @@
   void populateMismatches(item, List<MismatchDescriber> mismatches);
 
   /**
    * Create a [MismatchDescriber] describing a mismatch with a simple string.
    */
   MismatchDescriber simpleDescription(String description) =>
       (Description mismatchDescription) {
         mismatchDescription.add(description);
       };
 }