Move Compiler.libraries to LibraryLoader.

sdk/lib/_internal/compiler/implementation/deferred_load.dart

 // Copyright (c) 2014, 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 deferred_load;
 
 import 'dart2jslib.dart' show
     Backend,
     Compiler,
     CompilerTask,
@@ skipping 668 matching lines @@
     // import "lib2.dart" deferred as a;
     // 4.
     // import "lib.dart" as a;
     // import "lib2.dart" as a;
     // We must be able to signal error for case 1, 2, 3, but accept case 4.
 
     // The prefixes that have been used by any imports in this library.
     Setlet<String> usedPrefixes = new Setlet<String>();
     // The last deferred import we saw with a given prefix (if any).
     Map<String, Import> prefixDeferredImport = new Map<String, Import>();
-    for (LibraryElement library in compiler.libraries.values) {
+    for (LibraryElement library in compiler.libraryLoader.libraries) {
       compiler.withCurrentElement(library, () {
         prefixDeferredImport.clear();
         usedPrefixes.clear();
         // TODO(sigurdm): Make helper getLibraryImportTags when tags is a List
         // instead of a Link.
         for (LibraryTag tag in library.tags) {
           if (tag is! Import) continue;
           Import import = tag;
           _markIfDeferred(import, library);
           String prefix = (import.prefix != null)
@@ skipping 88 matching lines @@
     Element maybePrefix = elements[identifier];
     if (maybePrefix != null && maybePrefix.isPrefix) {
       PrefixElement prefixElement = maybePrefix;
       if (prefixElement.isDeferred) {
         return prefixElement;
       }
     }
     return null;
   }
 }