Change integration test send...() methods to use structured objects.

pkg/analysis_server/test/timing/completion/completion_simple.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.timing.simple;
 
 import 'dart:async';
 
+import 'package:analysis_server/src/protocol.dart';
 import 'package:path/path.dart';
 
 import '../timing_framework.dart';
 
 /**
  * Perform the timing test, printing the minimum, average and maximum times, as
  * well as the standard deviation to the output.
  */
 void main(List<String> args) {
   SimpleTest test = new SimpleTest();
@@ skipping 60 matching lines @@
   Future setUp() {
     completionReceived = new Completer();
     onCompletionResults.listen((_) {
       // We only care about the time to the first response.
       if (!completionReceived.isCompleted) {
         completionReceived.complete();
       }
     });
     sendAnalysisSetAnalysisRoots([dirname(mainFilePath)], []);
     sendAnalysisUpdateContent({
-      mainFilePath: {
-        'type': 'add',
-        'content': originalContent
-      }
+      mainFilePath: new AddContentOverlay(originalContent)
     });
     return new Future.value();
   }
 
   @override
   Future perform() {
     sendAnalysisUpdateContent({
-      mainFilePath: {
-        'type': 'change',
-        'edits': [{
-            'offset': cursorOffset,
-            'length': 0,
-            'replacement': '.'
-          }]
-      }
+      mainFilePath: new ChangeContentOverlay(
+          [new SourceEdit(cursorOffset, 0, '.')])
     });
     sendCompletionGetSuggestions(mainFilePath, cursorOffset + 1);
     return completionReceived.future;
   }
 
   @override
   Future tearDown() {
     sendAnalysisSetAnalysisRoots([], []);
     return new Future.value();
   }
 }