Update analysis server and integration tests to match new ChangeContentOverlay.

pkg/analysis_server/test/integration/analysis/update_content_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.integration.analysis.update.content;
 
 import 'package:analysis_testing/reflective_tests.dart';
 import 'package:unittest/unittest.dart';
 
 import '../integration_tests.dart';
@@ skipping 17 matching lines @@
         'type': 'add',
         'content': goodText
       }
     })).then((result) => analysisFinished).then((_) {
       // There should be no errors now because the contents on disk have been
       // overriden with goodText.
       expect(currentAnalysisErrors[pathname], isEmpty);
       return sendAnalysisUpdateContent({
         pathname: {
           'type': 'change',
-          'offset': goodText.indexOf(';'),
-          'length': 1,
-          'replacement': ''
+          'edits': [{
+              'offset': goodText.indexOf(';'),
+              'length': 1,
+              'replacement': ''
+            }]
         }
       });
     }).then((result) => analysisFinished).then((_) {
       // There should be errors now because we've removed the semicolon.
       expect(currentAnalysisErrors[pathname], isNot(isEmpty));
       return sendAnalysisUpdateContent({
         pathname: {
           'type': 'change',
-          'offset': goodText.indexOf(';'),
-          'length': 0,
-          'replacement': ';'
+          'edits': [{
+              'offset': goodText.indexOf(';'),
+              'length': 0,
+              'replacement': ';'
+            }]
         }
       });
     }).then((result) => analysisFinished).then((_) {
       // There should be no errors now because we've added the semicolon back.
       expect(currentAnalysisErrors[pathname], isEmpty);
       return sendAnalysisUpdateContent({
         pathname: {
           'type': 'remove'
         }
       });
     }).then((result) => analysisFinished).then((_) {
       // Now there should be errors again, because the contents on disk are no
       // longer overridden.
       expect(currentAnalysisErrors[pathname], isNot(isEmpty));
     });
   }
 }
 
 main() {
   runReflectiveTests(Test);
 }