Finish modifying analysis server to make use of code generation.

pkg/analysis_server/lib/src/computer/computer_hover.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.
 
 library computer.hover;
 
-import 'package:analysis_server/src/protocol2.dart' show HoverInformation;
+import 'package:analysis_server/src/protocol.dart' show HoverInformation;
 import 'package:analyzer/src/generated/ast.dart';
 import 'package:analyzer/src/generated/element.dart';
 
 
 /**
  * Converts [str] from a Dart Doc string with slashes and stars to a plain text
  * representation of the comment.
  */
 String _removeDartDocDelimiters(String str) {
   if (str == null) {
@@ skipping 83 matching lines @@
       hover.propagatedType = _safeToString(node.propagatedType);
       // done
       return hover;
     }
     // not an expression
     return null;
   }
 
   static _safeToString(obj) => obj != null ? obj.toString() : null;
 }