Refactor enqueuers

pkg/compiler/lib/src/universe/use.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.
 
 /// This library defines individual world impacts.
 ///
 /// We call these building blocks `uses`. Each `use` is a single impact of the
 /// world. Some example uses are:
 ///
 ///  * an invocation of a top level function
@@ skipping 305 matching lines @@
   String toString() => 'StaticUse($element,$kind,$type)';
 }
 
 enum TypeUseKind {
   IS_CHECK,
   AS_CAST,
   CHECKED_MODE_CHECK,
   CATCH_TYPE,
   TYPE_LITERAL,
   INSTANTIATION,
+  MIRROR_INSTANTIATION,
+  NATIVE_INSTANTIATION,
 }
 
 /// Use of a [DartType].
 class TypeUse {
   final DartType type;
   final TypeUseKind kind;
   final int hashCode;
 
   TypeUse.internal(DartType type, TypeUseKind kind)
       : this.type = type,
@@ skipping 23 matching lines @@
   /// [type] used as a type literal, like `foo() => T;`.
   factory TypeUse.typeLiteral(DartType type) {
     return new TypeUse.internal(type, TypeUseKind.TYPE_LITERAL);
   }
 
   /// [type] used in an instantiation, like `new T();`.
   factory TypeUse.instantiation(InterfaceType type) {
     return new TypeUse.internal(type, TypeUseKind.INSTANTIATION);
   }
 
+  /// [type] used in an instantiation through mirrors.
+  factory TypeUse.mirrorInstantiation(InterfaceType type) {
+    return new TypeUse.internal(type, TypeUseKind.MIRROR_INSTANTIATION);
+  }
+
+  /// [type] used in a native instantiation.
+  factory TypeUse.nativeInstantiation(InterfaceType type) {
+    return new TypeUse.internal(type, TypeUseKind.NATIVE_INSTANTIATION);
+  }
+
   bool operator ==(other) {
     if (identical(this, other)) return true;
     if (other is! TypeUse) return false;
     return type == other.type && kind == other.kind;
   }
 
   String toString() => 'TypeUse($type,$kind)';
 }