Make server use the common protocol classes

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

Index: pkg/analysis_server/lib/src/plugin/request_converter.dart
diff --git a/pkg/analysis_server/lib/src/plugin/request_converter.dart b/pkg/analysis_server/lib/src/plugin/request_converter.dart
index a254b0b99fa976488fd218358aebf14f572a869f..92cbc48642889a3139463d3fd8636431654899b9 100644
--- a/pkg/analysis_server/lib/src/plugin/request_converter.dart
+++ b/pkg/analysis_server/lib/src/plugin/request_converter.dart
@@ -4,7 +4,6 @@
 
 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;
 
 /**
@@ -50,24 +49,8 @@ class RequestConverter {
     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);
-  }
 }