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

pkg/front_end/lib/src/kernel_generator_impl.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 file.
 
 /// Defines the front-end API for converting source code to Dart Kernel objects.
 library front_end.kernel_generator_impl;
 
 import 'dart:async' show Future;
 import 'dart:async';
 
@@ skipping 84 matching lines @@
     // Linked dependencies are meant to be part of the program so they are not
     // marked external.
     for (var dependency in await options.loadLinkDependencies(nameRoot)) {
       var excluded = externalLibs(dependency);
       dillTarget.loader
           .appendLibraries(dependency, (uri) => !excluded.contains(uri));
     }
 
     await dillTarget.buildOutlines();
 
-    var kernelTarget = new KernelTarget(fs, dillTarget, uriTranslator);
+    var kernelTarget = new KernelTarget(fs, false, dillTarget, uriTranslator);
     options.inputs.forEach(kernelTarget.read);
     Program summaryProgram =
         await kernelTarget.buildOutlines(nameRoot: nameRoot);
     List<int> summary = null;
     if (buildSummary) {
       if (trimDependencies) {
         // TODO(sigmund): see if it is worth supporting this. Note: trimming the
         // program is destructive, so if we are emitting summaries and the
         // program in a single API call, we would need to clone the program here
         // to avoid deleting pieces that are needed by kernelTarget.buildProgram
@@ skipping 57 matching lines @@
   final Program program;
 
   /// Dependencies traversed by the compiler. Used only for generating
   /// dependency .GN files in the dart-sdk build system.
   /// Note this might be removed when we switch to compute depencencies without
   /// using the compiler itself.
   final List<Uri> deps;
 
   CompilerResult({this.summary, this.program, this.deps});
 }