Make more use of generated code in analysis server.

pkg/analysis_server/test/domain_completion_test.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.domain.completion;
 
 import 'dart:async';
 
 import 'package:analysis_server/src/constants.dart';
 import 'package:analysis_server/src/domain_completion.dart';
 import 'package:analysis_server/src/protocol.dart';
-import 'package:analysis_server/src/protocol2.dart' show
-    CompletionGetSuggestionsParams, CompletionGetSuggestionsResult;
-import 'package:analysis_server/src/services/completion/completion_suggestion.dart';
+import 'package:analysis_server/src/protocol2.dart';
 import 'package:analysis_server/src/services/index/index.dart' show Index;
 import 'package:analysis_server/src/services/index/local_memory_index.dart';
 import 'package:analysis_testing/reflective_tests.dart';
 import 'package:unittest/unittest.dart';
 
 import 'analysis_abstract.dart';
 import 'mocks.dart';
 
 main() {
   groupSep = ' | ';
@@ skipping 69 matching lines @@
       completionId = response.id;
       assertValidId(completionId);
       return pumpEventQueue().then((_) {
         expect(suggestionsDone, isTrue);
       });
     });
   }
 
   void processNotification(Notification notification) {
     if (notification.event == COMPLETION_RESULTS) {
-      String id = notification.getParameter(ID);
+      var params = new CompletionResultsParams.fromNotification(notification);
+      String id = params.id;
       assertValidId(id);
       if (id == completionId) {
         expect(suggestionsDone, isFalse);
-        replacementOffset = notification.getParameter(REPLACEMENT_OFFSET);
-        replacementLength = notification.getParameter(REPLACEMENT_LENGTH);
-        suggestionsDone = notification.getParameter(LAST);
+        replacementOffset = params.replacementOffset;
+        replacementLength = params.replacementLength;
+        suggestionsDone = params.last;
         expect(suggestionsDone, isNotNull);
-        suggestions = [];
-        for (Map<String, Object> json in notification.getParameter(RESULTS)) {
-          expect(json, isNotNull);
-          suggestions.add(new CompletionSuggestion.fromJson(json));
-        }
+        suggestions = params.results;
       }
     }
   }
 
   @override
   void setUp() {
     super.setUp();
     createProject();
     handler = new CompletionDomainHandler(server);
   }
@@ skipping 79 matching lines @@
     ''');
     return getSuggestions().then((_) {
 //      expect(replacementOffset, equals(completionOffset - 3));
 //      expect(replacementLength, equals(4));
       assertHasResult(CompletionSuggestionKind.CLASS, 'Object');
       assertHasResult(CompletionSuggestionKind.TOP_LEVEL_VARIABLE, 'test');
       assertNoResult('HtmlElement');
     });
   }
 }