Fix deferred loading with multiple apps on same page.

sdk/lib/_internal/compiler/js_lib/js_helper.dart

 // Copyright (c) 2013, 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 _js_helper;
 
 import 'dart:_js_embedded_names' show
     ALL_CLASSES,
     GET_ISOLATE_TAG,
     INTERCEPTED_NAMES,
     INTERCEPTORS_BY_TAG,
     LEAF_TAGS,
     METADATA,
     DEFERRED_LIBRARY_URIS,
     DEFERRED_LIBRARY_HASHES,
     INITIALIZE_LOADED_HUNK,
     IS_HUNK_LOADED,
+    IS_HUNK_INITIALIZED,
     NATIVE_SUPERCLASS_TAG_NAME;
 
 import 'dart:collection';
 import 'dart:_isolate_helper' show
     IsolateNatives,
     leaveJsAsync,
     enterJsAsync,
     isWorker;
 
 import 'dart:async' show Future, DeferredLoadException, Completer;
@@ skipping 3278 matching lines @@
   // For each loadId there is a list of hunk-uris to load, and a corresponding
   // list of hashes. These are stored in the app-global scope.
   var urisMap = JS_EMBEDDED_GLOBAL('', DEFERRED_LIBRARY_URIS);
   List<String> uris = JS('JSExtendableArray|Null', '#[#]', urisMap, loadId);
   var hashesMap = JS_EMBEDDED_GLOBAL('', DEFERRED_LIBRARY_HASHES);
   List<String> hashes = JS('JSExtendableArray|Null', '#[#]', hashesMap, loadId);
   if (uris == null) return new Future.value(null);
   // The indices into `uris` and `hashes` that we want to load.
   List<int> indices = new List.generate(uris.length, (i) => i);
   var isHunkLoaded = JS_EMBEDDED_GLOBAL('', IS_HUNK_LOADED);
+  var isHunkInitialized = JS_EMBEDDED_GLOBAL('', IS_HUNK_INITIALIZED);
   // Filter away indices for hunks that have already been loaded.
   List<int> indicesToLoad = indices
       .where((int i) => !JS('bool','#(#)', isHunkLoaded, hashes[i]))
       .toList();
-  // Load the needed hunks.
+  List<int> indicesToInitialize = indices
+      .where((int i) => !JS('bool','#(#)', isHunkInitialized, hashes[i]))
+      .toList();  // Load the needed hunks.
   return Future.wait(indicesToLoad
       .map((int i) => _loadHunk(uris[i]))).then((_) {
     // Now all hunks have been loaded, we run the needed initializers.
-    for (int i in indicesToLoad) {
+    for (int i in indicesToInitialize) {
       var initializer = JS_EMBEDDED_GLOBAL('', INITIALIZE_LOADED_HUNK);
       JS('void', '#(#)', initializer, hashes[i]);
     }
     bool updated = _loadedLibraries.add(loadId);
     if (updated && deferredLoadHook != null) {
       deferredLoadHook();
     }
   });
 }
 
@@ skipping 101 matching lines @@
   throw new MainError("No top-level function named 'main'.");
 }
 
 void badMain() {
   throw new MainError("'main' is not a function.");
 }
 
 void mainHasTooManyParameters() {
   throw new MainError("'main' expects too many parameters.");
 }