Add support for specifying files needing analysis

pkg/analysis_server/test/domain_analysis_test.dart

Index: pkg/analysis_server/test/domain_analysis_test.dart
diff --git a/pkg/analysis_server/test/domain_analysis_test.dart b/pkg/analysis_server/test/domain_analysis_test.dart
index 881315a1b24bcf8e0e01254b268c8034a3106f74..79411903ea9d63432d5a227b7932b165482a9c2c 100644
--- a/pkg/analysis_server/test/domain_analysis_test.dart
+++ b/pkg/analysis_server/test/domain_analysis_test.dart
@@ -9,10 +9,12 @@ import 'dart:async';
 import 'package:analysis_server/src/analysis_server.dart';
 import 'package:analysis_server/src/constants.dart';
 import 'package:analysis_server/src/domain_analysis.dart';
+import 'package:analysis_server/src/plugin/server_plugin.dart';
 import 'package:analysis_server/src/protocol.dart';
 import 'package:analyzer/file_system/memory_file_system.dart';
 import 'package:analyzer/instrumentation/instrumentation.dart';
 import 'package:path/path.dart';
+import 'package:plugin/manager.dart';
 import 'package:test_reflective_loader/test_reflective_loader.dart';
 import 'package:unittest/unittest.dart';
 
@@ -34,9 +36,13 @@ main() {
   setUp(() {
     serverChannel = new MockServerChannel();
     resourceProvider = new MemoryResourceProvider();
+    ExtensionManager manager = new ExtensionManager();
+    ServerPlugin serverPlugin = new ServerPlugin();
+    manager.processPlugins([serverPlugin]);
     server = new AnalysisServer(serverChannel, resourceProvider,
-        new MockPackageMapProvider(), null, new AnalysisServerOptions(),
-        new MockSdk(), InstrumentationService.NULL_SERVICE);
+        new MockPackageMapProvider(), null, serverPlugin,
+        new AnalysisServerOptions(), new MockSdk(),
+        InstrumentationService.NULL_SERVICE);
     handler = new AnalysisDomainHandler(server);
   });
 
@@ -360,9 +366,13 @@ class AnalysisTestHelper {
   AnalysisTestHelper() {
     serverChannel = new MockServerChannel();
     resourceProvider = new MemoryResourceProvider();
+    ExtensionManager manager = new ExtensionManager();
+    ServerPlugin serverPlugin = new ServerPlugin();
+    manager.processPlugins([serverPlugin]);
     server = new AnalysisServer(serverChannel, resourceProvider,
-        new MockPackageMapProvider(), null, new AnalysisServerOptions(),
-        new MockSdk(), InstrumentationService.NULL_SERVICE);
+        new MockPackageMapProvider(), null, serverPlugin,
+        new AnalysisServerOptions(), new MockSdk(),
+        InstrumentationService.NULL_SERVICE);
     handler = new AnalysisDomainHandler(server);
     // listen for notifications
     Stream<Notification> notificationStream =