Stop optimizing uses of "pub list".

pkg/analysis_server/lib/src/socket_server.dart

Index: pkg/analysis_server/lib/src/socket_server.dart
diff --git a/pkg/analysis_server/lib/src/socket_server.dart b/pkg/analysis_server/lib/src/socket_server.dart
index 1968766f2cd48c95968c0b088d02b7089c803b09..d5abd12a33733847bc0faf77001b55feb6deaf66 100644
--- a/pkg/analysis_server/lib/src/socket_server.dart
+++ b/pkg/analysis_server/lib/src/socket_server.dart
@@ -11,10 +11,10 @@ import 'package:analysis_server/src/plugin/server_plugin.dart';
 import 'package:analysis_server/src/protocol.dart';
 import 'package:analysis_server/src/services/index/index.dart';
 import 'package:analysis_server/src/services/index/local_file_index.dart';
-import 'package:analysis_server/src/source/optimizing_pub_package_map_provider.dart';
 import 'package:analysis_server/uri/resolver_provider.dart';
 import 'package:analyzer/file_system/physical_file_system.dart';
 import 'package:analyzer/instrumentation/instrumentation.dart';
+import 'package:analyzer/source/pub_package_map_provider.dart';
 import 'package:analyzer/src/generated/sdk_io.dart';
 import 'package:plugin/plugin.dart';
 
@@ -81,9 +81,8 @@ class SocketServer {
     }
 
     analysisServer = new AnalysisServer(serverChannel, resourceProvider,
-        new OptimizingPubPackageMapProvider(resourceProvider, defaultSdk),
-        index, serverPlugin, analysisServerOptions, defaultSdk,
-        instrumentationService,
+        new PubPackageMapProvider(resourceProvider, defaultSdk), index,
+        serverPlugin, analysisServerOptions, defaultSdk, instrumentationService,
         contextManager: contextManager,
         packageResolverProvider: packageResolverProvider,
         rethrowExceptions: false);