Hook for overriding the creation of a package resolver

pkg/analysis_server/lib/src/server/driver.dart

Index: pkg/analysis_server/lib/src/server/driver.dart
diff --git a/pkg/analysis_server/lib/src/server/driver.dart b/pkg/analysis_server/lib/src/server/driver.dart
index 0c1f9db9b211212cad128edd53ce3e125f011bf7..7604fc02431b66f2e6db307f472d7b5192028233 100644
--- a/pkg/analysis_server/lib/src/server/driver.dart
+++ b/pkg/analysis_server/lib/src/server/driver.dart
@@ -14,6 +14,7 @@ import 'package:analysis_server/src/server/http_server.dart';
 import 'package:analysis_server/src/server/stdio_server.dart';
 import 'package:analysis_server/src/socket_server.dart';
 import 'package:analysis_server/starter.dart';
+import 'package:analysis_server/uri/resolver_provider.dart';
 import 'package:analyzer/file_system/physical_file_system.dart';
 import 'package:analyzer/instrumentation/file_instrumentation.dart';
 import 'package:analyzer/instrumentation/instrumentation.dart';
@@ -283,6 +284,12 @@ class Driver implements ServerStarter {
   InstrumentationServer instrumentationServer;
 
   /**
+   * The package resolver provider used to override the way package URI's are
+   * resolved in some contexts.
+   */
+  ResolverProvider packageResolverProvider;
+
+  /**
    * The plugins that are defined outside the analysis_server package.
    */
   List<Plugin> _userDefinedPlugins = <Plugin>[];
@@ -388,8 +395,8 @@ class Driver implements ServerStarter {
     //
     // Create the sockets and start listening for requests.
     //
-    socketServer = new SocketServer(
-        analysisServerOptions, defaultSdk, service, serverPlugin);
+    socketServer = new SocketServer(analysisServerOptions, defaultSdk, service,
+        serverPlugin, packageResolverProvider);
     httpServer = new HttpAnalysisServer(socketServer);
     stdioServer = new StdioAnalysisServer(socketServer);
     socketServer.userDefinedPlugins = _userDefinedPlugins;