Remove corelib/corelib_strong and migrate last two remaining tests.

pkg/dev_compiler/tool/run.js

 // Copyright (c) 2016, 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 is a utility to run and debug an individual DDC compiled test.
 /// Tests can be run with either node or devtool (a Chrome-based utility with
 /// DOM APIs and developer tools support).
 ///
 /// Install devtool via:
 /// > npm install -g devtool
 ///
 /// Run via:
-/// > devtool tool/run.js -- corelib/apply2_test
+/// > devtool tool/run.js -- corelib_2/apply2_test
 /// or
-/// > node tool/run.js corelib/apply2_test
+/// > node tool/run.js corelib_2/apply2_test
 ///
 /// See TODO below on async / unittest support. 
 
 var args = process.argv.slice(2);
 if (args.length != 1) {
   throw new Error("Usage: devtool tool/run.js <test-module-name>");
 }
 var test = args[0];
 
 var requirejs = require('requirejs');
@@ skipping 55 matching lines @@
     if (!result || !(sdk.async.Future.is(result))) {
       finish();
     } else {
       // Wait iff result is a future
       result.then(sdk.dart.dynamic)(() => finish(), { onError: (e) => finish(e) });
     }
   }
 } catch (e) {
   finish(e);
 }