Move Compiler.libraries to LibraryLoader.

sdk/lib/_internal/compiler/implementation/enqueue.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.
 
 part of dart2js;
 
 typedef ItemCompilationContext ItemCompilationContextCreator();
 
 class EnqueueTask extends CompilerTask {
   final ResolutionEnqueuer resolution;
@@ skipping 26 matching lines @@
           addMemberByName(link.head.element);
         }
       }
       allElementsByName[name] = allElementsByName.putIfAbsent(
           name, () => const Link<Element>()).prepend(element);
       if (container != null) {
         container.forEachLocalMember(addMemberByName);
       }
     }
 
-    compiler.libraries.values.forEach(addMemberByName);
+    compiler.libraryLoader.libraries.forEach(addMemberByName);
   }
 
   String get name => 'Enqueue';
 
   EnqueueTask(Compiler compiler)
     : resolution = new ResolutionEnqueuer(
           compiler, compiler.backend.createItemCompilationContext),
       codegen = new CodegenEnqueuer(
           compiler, compiler.backend.createItemCompilationContext),
       super(compiler) {
@@ skipping 697 matching lines @@
     }
     CodegenWorkItem workItem = new CodegenWorkItem(
         element, itemCompilationContextCreator());
     queue.add(workItem);
   }
 
   void _logSpecificSummary(log(message)) {
     log('Compiled ${generatedCode.length} methods.');
   }
 }