Remove const instance creation expressions from the dependency graph.

pkg/analyzer/lib/src/generated/error.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 engine.error;
 
 import 'dart:collection';
 
 import 'ast.dart' show AstNode;
 import 'element.dart';
@@ skipping 1906 matching lines @@
    */
   static const CompileTimeErrorCode PRIVATE_OPTIONAL_PARAMETER =
       const CompileTimeErrorCode('PRIVATE_OPTIONAL_PARAMETER',
           "Named optional parameters cannot start with an underscore");
 
   /**
    * 12.1 Constants: It is a compile-time error if the value of a compile-time
    * constant expression depends on itself.
    */
   static const CompileTimeErrorCode RECURSIVE_COMPILE_TIME_CONSTANT =
-      const CompileTimeErrorCode('RECURSIVE_COMPILE_TIME_CONSTANT', "");
+      const CompileTimeErrorCode('RECURSIVE_COMPILE_TIME_CONSTANT',
+          "Compile-time constant expression depends on itself");
 
   /**
    * 7.6.1 Generative Constructors: A generative constructor may be redirecting,
    * in which case its only action is to invoke another generative constructor.
    *
    * TODO(scheglov) review this later, there are no explicit "it is a
    * compile-time error" in specification. But it was added to the co19 and
    * there is same error for factories.
    *
    * https://code.google.com/p/dart/issues/detail?id=954
@@ skipping 2954 matching lines @@
    * Initialize a newly created error code to have the given [name].
    */
   const TodoCode(String name) : super(name, "{0}");
 
   @override
   ErrorSeverity get errorSeverity => ErrorSeverity.INFO;
 
   @override
   ErrorType get type => ErrorType.TODO;
 }