Add documentation comments for enum and enum values. Resynthesize in analyzer.

pkg/front_end/lib/src/fasta/kernel/kernel_library_builder.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_library_builder;
 
 import 'package:front_end/src/fasta/dill/dill_library_builder.dart';
 import 'package:front_end/src/fasta/combinator.dart' as fasta;
 import 'package:front_end/src/fasta/export.dart';
 import 'package:front_end/src/fasta/import.dart';
@@ skipping 635 matching lines @@
         charEndOffset,
         nativeMethodName,
         redirectionTarget);
     currentDeclaration.addFactoryDeclaration(procedure, factoryDeclaration);
     addBuilder(name, procedure, charOffset);
     if (nativeMethodName != null) {
       addNativeMethod(procedure);
     }
   }
 
-  void addEnum(List<MetadataBuilder> metadata, String name,
-      List<Object> constantNamesAndOffsets, int charOffset, int charEndOffset) {
+  void addEnum(
+      String documentationComment,
+      List<MetadataBuilder> metadata,
+      String name,
+      List<Object> constantNamesAndOffsets,
+      int charOffset,
+      int charEndOffset) {
     addBuilder(
         name,
-        new KernelEnumBuilder(metadata, name, constantNamesAndOffsets, this,
-            charOffset, charEndOffset),
+        new KernelEnumBuilder(documentationComment, metadata, name,
+            constantNamesAndOffsets, this, charOffset, charEndOffset),
         charOffset);
   }
 
   void addFunctionTypeAlias(
       List<MetadataBuilder> metadata,
       String name,
       List<TypeVariableBuilder> typeVariables,
       covariant KernelFunctionTypeBuilder type,
       int charOffset) {
     KernelFunctionTypeAliasBuilder typedef = new KernelFunctionTypeAliasBuilder(
@@ skipping 275 matching lines @@
           mixinApplicationClasses.putIfAbsent(name, () => builder);
       if (existing != builder) {
         part.scope.local.remove(name);
       }
     });
     super.includePart(part);
     nativeMethods.addAll(part.nativeMethods);
     boundlessTypeVariables.addAll(part.boundlessTypeVariables);
   }
 }