Use "pub list-package-dirs" to resolve package URIs in analysis server.

pkg/analysis_server/test/domain_search_test.dart

Index: pkg/analysis_server/test/domain_search_test.dart
diff --git a/pkg/analysis_server/test/domain_search_test.dart b/pkg/analysis_server/test/domain_search_test.dart
index 9734e8aa26284c14e3e6924385506cd14302ab87..8366fbdea4252ab558ade454748ad325e7aca5cd 100644
--- a/pkg/analysis_server/test/domain_search_test.dart
+++ b/pkg/analysis_server/test/domain_search_test.dart
@@ -24,7 +24,8 @@ main() {
   setUp(() {
     serverChannel = new MockServerChannel();
     resourceProvider = new MemoryResourceProvider();
-    server = new AnalysisServer(serverChannel, resourceProvider);
+    server = new AnalysisServer(
+        serverChannel, resourceProvider, new MockPackageMapProvider());
     server.defaultSdk = new MockSdk();
     handler = new SearchDomainHandler(server);
   });