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

pkg/analysis_server/test/timing/completion/completion_simple.dart

Index: pkg/analysis_server/test/timing/completion/completion_simple.dart
diff --git a/pkg/analysis_server/test/timing/completion/completion_simple.dart b/pkg/analysis_server/test/timing/completion/completion_simple.dart
index bd5b13dad8e4a0214e8fe4a8754899c1870e07b0..4b98eb9a379594b4e8ed268a8cd724d9becdd0b5 100644
--- a/pkg/analysis_server/test/timing/completion/completion_simple.dart
+++ b/pkg/analysis_server/test/timing/completion/completion_simple.dart
@@ -6,6 +6,7 @@ library test.timing.simple;
 
 import 'dart:async';
 
+import 'package:analysis_server/src/protocol.dart';
 import 'package:path/path.dart';
 
 import '../timing_framework.dart';
@@ -86,10 +87,7 @@ f(C c) {
     });
     sendAnalysisSetAnalysisRoots([dirname(mainFilePath)], []);
     sendAnalysisUpdateContent({
-      mainFilePath: {
-        'type': 'add',
-        'content': originalContent
-      }
+      mainFilePath: new AddContentOverlay(originalContent)
     });
     return new Future.value();
   }
@@ -97,14 +95,8 @@ f(C c) {
   @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;