Dart: Runs dartanalyzer for the dart_pkg build rule.

mojo/public/dart/lib/src/control_message.dart

 // Copyright 2015 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 part of bindings;
 
 // Handles InterfaceControlMessages for a stub.
 class ControlMessageHandler {
   static bool isControlMessage(ServiceMessage message) =>
       _isRun(message) || _isRunOrClose(message);
@@ skipping 26 matching lines @@
     response.queryVersionResult = new icm.QueryVersionResult();
     response.queryVersionResult.version = interface_version;
     // Return response.
     return new Future.value(
         stub.buildResponseWithId(response,
                                  icm.kRunMessageId,
                                  message.header.requestId,
                                  MessageHeader.kMessageIsResponse));
   }
 
-  static Future<Message> _handleRunOrClose(Stub stub,
-                                           int interface_version,
-                                           ServiceMessage message) {
+  static Future _handleRunOrClose(Stub stub,
+                                  int interface_version,
+                                  ServiceMessage message) {
     // Deserialize message.
     var params = icm.RunOrClosePipeMessageParams.deserialize(message.payload);
     // Grab required version.
     var requiredVersion = params.requireVersion.version;
-    if (interface_version >= requiredVersion) {
-      // Stub meets the requirements.
-      return;
+    if (interface_version < requiredVersion) {
+      // Stub does not implement required version. Close the pipe immediately.
+      stub.close(immediate: true);
     }
-    // Stub does not implement required version. Close the pipe immediately.
-    stub.close(immediate: true);
+    return null;
   }
 }