Remove unused contentHash from results

pkg/analysis_server/test/src/plugin/plugin_watcher_test.dart

Index: pkg/analysis_server/test/src/plugin/plugin_watcher_test.dart
diff --git a/pkg/analysis_server/test/src/plugin/plugin_watcher_test.dart b/pkg/analysis_server/test/src/plugin/plugin_watcher_test.dart
index a78e718b2da5ee8e3c2a7ab8159cf99090089689..888bfe4ae49e3b9c197ae407c67cc56f72c26745 100644
--- a/pkg/analysis_server/test/src/plugin/plugin_watcher_test.dart
+++ b/pkg/analysis_server/test/src/plugin/plugin_watcher_test.dart
@@ -127,8 +127,8 @@ class TestDriver implements AnalysisDriver {
 
   Future<Null> computeResult(String uri) {
     FileState file = fsState.getFileForUri(Uri.parse(uri));
-    AnalysisResult result = new AnalysisResult(this, null, file.path, null,
-        true, null, null, null, null, null, null, null);
+    AnalysisResult result = new AnalysisResult(
+        this, null, file.path, null, true, null, null, null, null, null, null);
     _resultController.add(result);
     return new Future.delayed(new Duration(milliseconds: 1));
   }