Compute NativeBehavior for foreign functions.

pkg/compiler/lib/src/common/names.dart

Index: pkg/compiler/lib/src/common/names.dart
diff --git a/pkg/compiler/lib/src/common/names.dart b/pkg/compiler/lib/src/common/names.dart
index 2fa535b4e1af16e9a0dcba9b4f64a7e17e189da4..56d826c960b757c2438f873619a8e99c7e39cdde 100644
--- a/pkg/compiler/lib/src/common/names.dart
+++ b/pkg/compiler/lib/src/common/names.dart
@@ -152,6 +152,10 @@ class Uris {
   /// The URI for 'dart:async'.
   static final Uri dart_async = new Uri(scheme: 'dart', path: 'async');
 
+  /// The URI for 'dart:collection'.
+  static final Uri dart_collection =
+      new Uri(scheme: 'dart', path: 'collection');
+
   /// The URI for 'dart:core'.
   static final Uri dart_core = new Uri(scheme: 'dart', path: 'core');