Add an experimental domain

pkg/analysis_server/lib/src/domain_experimental.dart

Index: pkg/analysis_server/lib/src/domain_experimental.dart
diff --git a/pkg/analysis_server/lib/src/domain_experimental.dart b/pkg/analysis_server/lib/src/domain_experimental.dart
new file mode 100644
index 0000000000000000000000000000000000000000..43631f2481795ce2a1a53c8dc33925c139f8e83b
--- /dev/null
+++ b/pkg/analysis_server/lib/src/domain_experimental.dart
@@ -0,0 +1,51 @@
+// Copyright (c) 2015, 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 src.domain_experimental;
+
+import 'dart:core' hide Resource;

[pquitslund, 2015/10/16 19:34:22]

Every time I see this I cry a little.

[scheglov, 2015/10/16 20:08:50]

It'll go soon.

/**
 * DEPRECATED. A resource that can be read into the program.
 *
 * WARNING: This API is _deprecated_,
 * and it will be removed in 1.14. Please use
 * https://pub.dartlang.org/packages/resource instead.
 *
 * A resource is data that can be located using a URI and read into
 * the program at runtime.
 * The URI may use the `package` scheme to read resources provided
 * along with package sources.
 */
@Deprecated('1.14')
abstract class Resource {

+
+import 'package:analysis_server/plugin/protocol/protocol.dart';
+import 'package:analysis_server/src/analysis_server.dart';
+
+/**
+ * Instances of the class [ExperimentalDomainHandler] implement a
+ * [RequestHandler] that handles requests in the `experimental` domain.
+ */
+class ExperimentalDomainHandler implements RequestHandler {
+  /**
+   * The analysis server that is using this handler to process requests.
+   */
+  final AnalysisServer server;
+
+  /**
+   * The name of the request used to get diagnostic information.
+   */
+  static const String EXPERIMENTAL_DIAGNOSTICS = 'experimental.diagnostics';
+
+  /**
+   * Initialize a newly created handler to handle requests for the given [server].
+   */
+  ExperimentalDomainHandler(this.server);
+
+  @override
+  Response handleRequest(Request request) {
+    try {
+      String requestName = request.method;
+      if (requestName == EXPERIMENTAL_DIAGNOSTICS) {
+        return computeDiagnostics(request);
+      }
+    } on RequestFailure catch (exception) {
+      return exception.response;
+    }
+    return null;
+  }
+
+  /**
+   * Implement the `experimental.diagnostics` request.
+   */
+  Response computeDiagnostics(Request request) {
+    return new Response.unknownRequest(request);
+  }
+}