Rename internal library dart:_collection-dev to dart:_internal.

sdk/lib/_internal/lib/interceptors.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.
 
 library _interceptors;
 
 import 'dart:collection';
-import 'dart:_collection-dev' hide Symbol;
-import "dart:_collection-dev" as _symbol_dev show Symbol;
+import 'dart:_internal' hide Symbol;
+import "dart:_internal" as _symbol_dev show Symbol;
 import 'dart:_js_helper' show allMatchesInStringUnchecked,
                               Null,
                               JSSyntaxRegExp,
                               Primitives,
                               checkInt,
                               checkNull,
                               checkNum,
                               checkString,
                               defineProperty,
                               getRuntimeType,
@@ skipping 354 matching lines @@
 }
 
 
 /**
  * Interceptor for unclassified JavaScript objects, typically objects with a
  * non-trivial prototype chain.
  */
 class UnknownJavaScriptObject extends JavaScriptObject {
   const UnknownJavaScriptObject();
 }