Revert "Clean-up the registration of plugins"

pkg/analyzer/test/generated/test_support.dart

Index: pkg/analyzer/test/generated/test_support.dart
diff --git a/pkg/analyzer/test/generated/test_support.dart b/pkg/analyzer/test/generated/test_support.dart
index 06f51d7fc4cdbd666f32ba6414c2ee13889af369..20cc0e2633937cf63bf8b7beb51ac0a9090b6df7 100644
--- a/pkg/analyzer/test/generated/test_support.dart
+++ b/pkg/analyzer/test/generated/test_support.dart
@@ -13,7 +13,6 @@ import 'package:analyzer/src/generated/error.dart';
 import 'package:analyzer/src/generated/java_core.dart';
 import 'package:analyzer/src/generated/java_engine.dart';
 import 'package:analyzer/src/generated/source.dart';
-import 'package:plugin/manager.dart';
 import 'package:unittest/unittest.dart';
 
 import 'resolver_test.dart';
@@ -92,10 +91,7 @@ class EngineTestCase {
     return null;
   }
 
-  void setUp() {
-    new ExtensionManager()
-        .processPlugins(AnalysisEngine.instance.supportedPlugins);
-  }
+  void setUp() {}
 
   void tearDown() {}
 
@@ -561,6 +557,10 @@ class TestSource extends Source {
    */
   bool generateExceptionOnRead = false;
 
+  @override
+  int get modificationStamp =>
+      generateExceptionOnRead ? -1 : _modificationStamp;
+
   /**
    * The number of times that the contents of this source have been requested.
    */
@@ -586,15 +586,10 @@ class TestSource extends Source {
   }
 
   int get hashCode => 0;
-
   bool get isInSystemLibrary {
     return false;
   }
 
-  @override
-  int get modificationStamp =>
-      generateExceptionOnRead ? -1 : _modificationStamp;
-
   String get shortName {
     return _name;
   }