Retain elements a finer granularity than library.

dart/sdk/lib/_internal/compiler/implementation/compile_time_constants.dart

 // Copyright (c) 2012, 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.
 
 part of dart2js;
 
 /**
  * The [ConstantHandler] keeps track of compile-time constants,
  * initializations of global and static fields, and default values of
  * optional parameters.
@@ skipping 726 matching lines @@
 }
 
 class TryCompileTimeConstantEvaluator extends CompileTimeConstantEvaluator {
   TryCompileTimeConstantEvaluator(ConstantHandler handler,
                                   TreeElements elements,
                                   Compiler compiler)
       : super(handler, elements, compiler, isConst: true);
 
   error(Node node) {
     // Just fail without reporting it anywhere.
-    throw new CompileTimeConstantError(MessageKind.NOT_A_COMPILE_TIME_CONSTANT);
+    throw new CompileTimeConstantError(
+        MessageKind.NOT_A_COMPILE_TIME_CONSTANT, const {},
+        compiler.terseDiagnostics);
   }
 }
 
 class ConstructorEvaluator extends CompileTimeConstantEvaluator {
   final FunctionElement constructor;
   final Map<Element, Constant> definitions;
   final Map<Element, Constant> fieldValues;
 
   /**
    * Documentation wanted -- johnniwinther
@@ skipping 170 matching lines @@
           if (fieldValue == null) {
             // Use the default value.
             fieldValue = handler.compileConstant(field);
           }
           jsNewArguments.add(fieldValue);
         },
         includeSuperAndInjectedMembers: true);
     return jsNewArguments;
   }
 }