Revert "Remove unused option in server API"

pkg/analysis_server/lib/src/analysis_server.dart

Index: pkg/analysis_server/lib/src/analysis_server.dart
diff --git a/pkg/analysis_server/lib/src/analysis_server.dart b/pkg/analysis_server/lib/src/analysis_server.dart
index 3d0940cb03186770353e637c3c3a2e754791b62e..b865b8e09c8b891a384a5e70ee9a63c8e1a6c694 100644
--- a/pkg/analysis_server/lib/src/analysis_server.dart
+++ b/pkg/analysis_server/lib/src/analysis_server.dart
@@ -30,6 +30,7 @@ import 'package:analyzer/exception/exception.dart';
 import 'package:analyzer/file_system/file_system.dart';
 import 'package:analyzer/instrumentation/instrumentation.dart';
 import 'package:analyzer/plugin/resolver_provider.dart';
+import 'package:analyzer/source/pub_package_map_provider.dart';
 import 'package:analyzer/src/context/builder.dart';
 import 'package:analyzer/src/dart/ast/utilities.dart';
 import 'package:analyzer/src/generated/engine.dart';
@@ -37,6 +38,7 @@ import 'package:analyzer/src/generated/sdk.dart';
 import 'package:analyzer/src/generated/source.dart';
 import 'package:analyzer/src/generated/source_io.dart';
 import 'package:analyzer/src/generated/utilities_general.dart';
+import 'package:analyzer/src/summary/package_bundle_reader.dart';
 import 'package:analyzer/src/summary/pub_summary.dart';
 import 'package:analyzer/src/task/dart.dart';
 import 'package:analyzer/src/util/glob.dart';
@@ -318,6 +320,7 @@ class AnalysisServer {
   AnalysisServer(
       this.channel,
       this.resourceProvider,
+      PubPackageMapProvider packageMapProvider,
       Index _index,
       this.serverPlugin,
       this.options,
@@ -347,6 +350,7 @@ class AnalysisServer {
           resourceProvider,
           sdkManager,
           packageResolverProvider,
+          packageMapProvider,
           analyzedFilesGlobs,
           instrumentationService,
           defaultContextOptions);
@@ -1424,6 +1428,14 @@ class AnalysisServer {
     });
   }
 
+  void _computingPackageMap(bool computing) {
+    if (serverServices.contains(ServerService.STATUS)) {
+      PubStatus pubStatus = new PubStatus(computing);
+      ServerStatusParams params = new ServerStatusParams(pub: pubStatus);
+      sendNotification(params.toNotification());
+    }
+  }
+
   /**
    * Return a set of all contexts whose associated folder is contained within,
    * or equal to, one of the resources in the given list of [resources].
@@ -1614,6 +1626,10 @@ class ServerContextManagerCallbacks extends ContextManagerCallbacks {
   }
 
   @override
+  void computingPackageMap(bool computing) =>
+      analysisServer._computingPackageMap(computing);
+
+  @override
   ContextBuilder createContextBuilder(Folder folder, AnalysisOptions options) {
     String defaultPackageFilePath = null;
     String defaultPackagesDirectoryPath = null;