Make server use the common protocol classes

pkg/analysis_server/lib/src/plugin/request_converter.dart

 // Copyright (c) 2017, 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.
 
 import 'package:analysis_server/protocol/protocol_generated.dart' as server;
 import 'package:analysis_server/src/protocol/protocol_internal.dart' as server;
-import 'package:analyzer_plugin/protocol/protocol_common.dart' as plugin;
 import 'package:analyzer_plugin/protocol/protocol_generated.dart' as plugin;
 
 /**
  * An object used to convert between similar objects defined by both the plugin
  * protocol and the server protocol.
  */
 class RequestConverter {
   plugin.AnalysisReanalyzeParams convertAnalysisReanalyzeParams(
       server.AnalysisReanalyzeParams params) {
     return new plugin.AnalysisReanalyzeParams(roots: params.roots);
@@ skipping 25 matching lines @@
       }
     }
     return new plugin.AnalysisSetSubscriptionsParams(pluginSubscriptions);
   }
 
   plugin.AnalysisUpdateContentParams convertAnalysisUpdateContentParams(
       server.AnalysisUpdateContentParams params) {
     Map<String, dynamic> serverOverlays = params.files;
     Map<String, dynamic> pluginOverlays = <String, dynamic>{};
     for (String file in serverOverlays.keys) {
-      pluginOverlays[file] = convertFileOverlay(serverOverlays[file]);
+      pluginOverlays[file] = serverOverlays[file];
     }
     return new plugin.AnalysisUpdateContentParams(pluginOverlays);
   }
-
-  Object convertFileOverlay(Object overlay) {
-    if (overlay is server.AddContentOverlay) {
-      return new plugin.AddContentOverlay(overlay.content);
-    } else if (overlay is server.ChangeContentOverlay) {
-      return new plugin.ChangeContentOverlay(
-          overlay.edits.map(convertSourceEdit).toList());
-    } else if (overlay is server.RemoveContentOverlay) {
-      return new plugin.RemoveContentOverlay();
-    }
-    return null;
-  }
-
-  plugin.SourceEdit convertSourceEdit(server.SourceEdit edit) {
-    return new plugin.SourceEdit(edit.offset, edit.length, edit.replacement);
-  }
 }