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

pkg/front_end/lib/src/fasta/fasta.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;
 
 import 'dart:async' show Future;
 
 import 'dart:convert' show JSON;
 
@@ skipping 94 matching lines @@
   }
 }
 
 class CompileTask {
   final CompilerContext c;
   final Ticker ticker;
 
   CompileTask(this.c, this.ticker);
 
   DillTarget createDillTarget(TranslateUri uriTranslator) {
-    return new DillTarget(ticker, uriTranslator);
+    return new DillTarget(null, ticker, uriTranslator);
   }
 
   KernelTarget createKernelTarget(
       DillTarget dillTarget, TranslateUri uriTranslator, bool strongMode) {
     return new KernelTarget(
         c.fileSystem, dillTarget, uriTranslator, strongMode, c.uriToSource);
   }
 
   Future<KernelTarget> buildOutline([Uri output]) async {
     TranslateUri uriTranslator = await TranslateUri.parse(
@@ skipping 46 matching lines @@
     if (!await new Directory.fromUri(patchedSdk).exists()) {
       return new CompilationResult.error(
           formatUnexpected(patchedSdk, -1, "Patched sdk directory not found."));
     }
 
     Program program;
     try {
       TranslateUri uriTranslator =
           await TranslateUri.parse(PhysicalFileSystem.instance, null, packages);
       final Ticker ticker = new Ticker(isVerbose: verbose);
-      final DillTarget dillTarget = new DillTarget(ticker, uriTranslator);
+      final DillTarget dillTarget = new DillTarget(null, ticker, uriTranslator);
       _appendDillForUri(dillTarget, patchedSdk.resolve('platform.dill'));
       final KernelTarget kernelTarget = new KernelTarget(
           PhysicalFileSystem.instance, dillTarget, uriTranslator, strongMode);
       kernelTarget.read(fileName);
       await dillTarget.writeOutline(null);
       program = await kernelTarget.writeOutline(null);
       program = await kernelTarget.writeProgram(null);
       if (kernelTarget.errors.isNotEmpty) {
         return new CompilationResult.errors(kernelTarget.errors
             .map((err) => err.toString())
@@ skipping 50 matching lines @@
   await CompilerCommandLine.withGlobalOptions("", [""],
       (CompilerContext c) async {
     c.options.options["--packages"] = packages;
     if (verbose) {
       c.options.options["--verbose"] = true;
     }
 
     TranslateUri uriTranslator = await TranslateUri.parse(
         c.fileSystem, c.options.sdk, c.options.packages);
     ticker.logMs("Read packages file");
-    DillTarget dillTarget = new DillTarget(ticker, uriTranslator);
+    DillTarget dillTarget = new DillTarget(null, ticker, uriTranslator);
     _appendDillForUri(dillTarget, platform);
     KernelTarget kernelTarget = new KernelTarget(PhysicalFileSystem.instance,
         dillTarget, uriTranslator, false, c.uriToSource);
 
     kernelTarget.read(script);
     await dillTarget.writeOutline(null);
     await kernelTarget.loader.buildOutlines();
     await kernelTarget.writeDepsFile(output, depsFile,
         extraDependencies: extraDependencies);
   });
 }
 
 /// Load the [Program] from the given [uri] and append its libraries
 /// to the [dillTarget].
 void _appendDillForUri(DillTarget dillTarget, Uri uri) {
   var bytes = new File.fromUri(uri).readAsBytesSync();
   var platformProgram = loadProgramFromBytes(bytes);
+  platformProgram.unbindCanonicalNames();
   dillTarget.loader.appendLibraries(platformProgram);
 }
 
 // TODO(ahe): https://github.com/dart-lang/sdk/issues/28316
 class ByteSink implements Sink<List<int>> {
   final BytesBuilder builder = new BytesBuilder();
 
   void add(List<int> data) {
     builder.add(data);
   }
 
   void close() {
     // Nothing to do.
   }
 }