Add documentationComment for Class to Kernel. Parse it. Resynthesize in Analyzer.

pkg/front_end/test/fasta/shaker_test.dart

 // Copyright (c) 2017, 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.md file.
 
 /// Tests basic functionality of the API tree-shaker.
 ///
 /// Each input file is built and tree-shaken, then we check that the set of
 /// libraries, classes, and members that are retained match those declared in an
 /// expectations file.
 ///
@@ skipping 87 matching lines @@
   Future<Result<_IntermediateData>> run(
       TestDescription description, TreeShakerContext context) async {
     try {
       var platformOutline = context.loadPlatformOutline();
       platformOutline.unbindCanonicalNames();
       var dillTarget = new DillTarget(
           new Ticker(isVerbose: false),
           context.uriTranslator,
           new VmFastaTarget(new TargetFlags(strongMode: false)));
       dillTarget.loader.appendLibraries(platformOutline);
-      var sourceTarget = new KernelTarget(
-          PhysicalFileSystem.instance, dillTarget, context.uriTranslator);
+      var sourceTarget = new KernelTarget(PhysicalFileSystem.instance, false,
+          dillTarget, context.uriTranslator);
       await dillTarget.buildOutlines();
 
       var inputUri = description.uri;
       var libUri = inputUri.resolve('lib/lib.dart');
       sourceTarget.read(libUri);
       sourceTarget.read(inputUri);
       var contents = new File.fromUri(inputUri).readAsStringSync();
       var showCoreLibraries = contents.contains("@@SHOW_CORE_LIBRARIES@@");
       await sourceTarget.buildOutlines();
       var program = await sourceTarget.buildProgram();
@@ skipping 99 matching lines @@
 }
 
 /// A special library used only to test the shaker. The suite above will
 /// tree-shake the contents of this library.
 const _specialLibraryPath = 'pkg/front_end/testcases/shaker/lib/lib.dart';
 
 /// Tree-shake dart:* libraries and the library under [_specialLibraryPath].
 bool _isTreeShaken(Uri uri) =>
     uri.isScheme('dart') ||
     Uri.base.resolveUri(uri).path.endsWith(_specialLibraryPath);