Support serialization of all resolved asts from dart:core

tests/compiler/dart2js/memory_compiler.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 dart2js.test.memory_compiler;
 
 import 'dart:async';
 
 import 'package:compiler/compiler.dart' show
     DiagnosticHandler;
@@ skipping 163 matching lines @@
         }
         copiedLibraries[library.canonicalUri] = library;
       }
     });
     // TODO(johnniwinther): Assert that no libraries are loaded lazily from
     // this call.
     compiler.onLibrariesLoaded(new MemoryLoadedLibraries(copiedLibraries));
 
     compiler.backend.constantCompilerTask.copyConstantValues(
         cachedCompiler.backend.constantCompilerTask);
-    compiler.symbolConstructor = cachedCompiler.symbolConstructor;
     compiler.mirrorSystemClass = cachedCompiler.mirrorSystemClass;
     compiler.mirrorsUsedClass = cachedCompiler.mirrorsUsedClass;
     compiler.mirrorSystemGetNameFunction =
         cachedCompiler.mirrorSystemGetNameFunction;
-    compiler.symbolImplementationClass =
-        cachedCompiler.symbolImplementationClass;
-    compiler.symbolValidatedConstructor =
-        cachedCompiler.symbolValidatedConstructor;
     compiler.mirrorsUsedConstructor = cachedCompiler.mirrorsUsedConstructor;
     compiler.deferredLibraryClass = cachedCompiler.deferredLibraryClass;
 
     Iterable cachedTreeElements =
         cachedCompiler.enqueuer.resolution.processedElements;
     cachedTreeElements.forEach((element) {
       if (element.library.isPlatformLibrary) {
         compiler.enqueuer.resolution.registerProcessedElement(element);
       }
     });
@@ skipping 74 matching lines @@
       createDiagnosticHandler(diagnosticHandler, provider, showDiagnostics);
 
   List<Uri> libraries = <Uri>[];
   memorySourceFiles.forEach((String path, _) {
     libraries.add(new Uri(scheme: 'memory', path: path));
   });
 
   return analyze(libraries, libraryRoot, packageRoot,
                  provider, handler, options);
 }