Add a way to use shared CanonicalName root to deserialize Program.

pkg/front_end/lib/src/fasta/kernel/kernel_target.dart

 // 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.
 
 library fasta.kernel_target;
 
 import 'dart:async' show Future;
 
 import 'dart:io' show File, IOSink;
 
@@ skipping 364 matching lines @@
     final Program binary = dillTarget.loader.program;
     if (binary != null) {
       libraries.addAll(binary.libraries);
       uriToSource.addAll(binary.uriToSource);
     }
 
     // TODO(ahe): Remove this line. Kernel seems to generate a default line map
     // that used when there's no fileUri on an element. Instead, ensure all
     // elements have a fileUri.
     uriToSource[""] = new Source(<int>[0], const <int>[]);
-    Program program = new Program(libraries, uriToSource);
+    Program program =
+        new Program(libraries: libraries, uriToSource: uriToSource);
     if (loader.first != null) {
       Builder builder = loader.first.lookup("main", -1, null);
       if (builder is KernelProcedureBuilder) {
         program.mainMethod = builder.procedure;
       }
     }
     if (errors.isEmpty || dillTarget.isLoaded) {
       runLinkTransformations(program);
     }
     ticker.logMs("Linked program");
@@ skipping 322 matching lines @@
   }
   for (Constructor constructor in superclass.constructors) {
     if (constructor.name.name.isEmpty) {
       return constructor.function.requiredParameterCount == 0
           ? constructor
           : null;
     }
   }
   return null;
 }