Move CONSTANT_DEPENDENCIES out of the analyzer public API.

pkg/analyzer/lib/src/task/dart.dart

 // Copyright (c) 2015, 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 analyzer.src.task.dart;
 
 import 'dart:collection';
 import 'dart:math' as math;
 
 import 'package:analyzer/src/generated/ast.dart';
@@ skipping 64 matching lines @@
  * The element model associated with a single compilation unit.
  *
  * The result is only available for targets representing a Dart compilation unit.
  */
 final ResultDescriptor<CompilationUnitElement> COMPILATION_UNIT_ELEMENT =
     new ResultDescriptor<CompilationUnitElement>(
         'COMPILATION_UNIT_ELEMENT', null,
         cachingPolicy: ELEMENT_CACHING_POLICY);
 
 /**
+ * The list of [Element]s which a given constant element depends on.
+ *
+ * The result is only available for targets representing a constant [Element]
+ * (i.e. a constant variable declaration, a constant constructor, or a
+ * parameter element with a default value).
+ */
+final ListResultDescriptor<Element> CONSTANT_DEPENDENCIES =
+    new ListResultDescriptor<Element>('CONSTANT_DEPENDENCIES', <Element>[]);
+
+/**
  * An [Element] that has been successfully constant-evaluated.
  *
  * TODO(paulberry): is ELEMENT_CACHING_POLICY the correct caching policy?
  */
 final ResultDescriptor<Element> CONSTANT_EVALUATED_ELEMENT =
     new ResultDescriptor<Element>('CONST_EVALUATED_ELEMENT', null,
         cachingPolicy: ELEMENT_CACHING_POLICY);
 
 /**
  * The [ConstructorElement]s of a [ClassElement].
@@ skipping 2957 matching lines @@
   @override
   bool moveNext() {
     if (_newSources.isEmpty) {
       return false;
     }
     currentTarget = _newSources.first;
     _newSources.remove(currentTarget);
     return true;
   }
 }