Move diagnostics to `diagnostics` domain (#24931).

pkg/analysis_server/test/integration/integration_test_methods.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.
 //
 // This file has been automatically generated.  Please do not edit it manually.
 // To regenerate the file, use the script
 // "pkg/analysis_server/tool/spec/generate_files".
 
 /**
  * Convenience methods for running integration tests
@@ skipping 1619 matching lines @@
 
   /**
    * Return server diagnostics.
    *
    * Returns
    *
    * contexts ( List<ContextData> )
    *
    *   The list of analysis contexts.
    */
-  Future<ExperimentalGetDiagnosticsResult> sendExperimentalGetDiagnostics() {
-    return server.send("experimental.getDiagnostics", null)
+  Future<DiagnosticGetDiagnosticsResult> sendDiagnosticGetDiagnostics() {
+    return server.send("diagnostic.getDiagnostics", null)
         .then((result) {
       ResponseDecoder decoder = new ResponseDecoder(null);
-      return new ExperimentalGetDiagnosticsResult.fromJson(decoder, 'result', result);
+      return new DiagnosticGetDiagnosticsResult.fromJson(decoder, 'result', result);
     });
   }
 
   /**
    * Initialize the fields in InttestMixin, and ensure that notifications will
    * be handled.
    */
   void initializeInttestMixin() {
     _onServerConnected = new StreamController<ServerConnectedParams>(sync: true);
     onServerConnected = _onServerConnected.stream.asBroadcastStream();
@@ skipping 105 matching lines @@
       case "execution.launchData":
         expect(params, isExecutionLaunchDataParams);
         _onExecutionLaunchData.add(new ExecutionLaunchDataParams.fromJson(decoder, 'params', params));
         break;
       default:
         fail('Unexpected notification: $event');
         break;
     }
   }
 }