More strong mode changes in analysis_server

pkg/analysis_server/test/analysis/update_content_test.dart

Index: pkg/analysis_server/test/analysis/update_content_test.dart
diff --git a/pkg/analysis_server/test/analysis/update_content_test.dart b/pkg/analysis_server/test/analysis/update_content_test.dart
index a2ae03b8589068bb14e2cfc4d1a108be4c4b7986..6ab4706202b1d628e98bc0263aeca35f316e6fe5 100644
--- a/pkg/analysis_server/test/analysis/update_content_test.dart
+++ b/pkg/analysis_server/test/analysis/update_content_test.dart
@@ -30,7 +30,7 @@ compilationUnitMatcher(String file) {
 
 @reflectiveTest
 class UpdateContentTest extends AbstractAnalysisTest {
-  Map<String, List<AnalysisError>> filesErrors = {};
+  Map<String, List<String>> filesErrors = {};
   int serverErrorCount = 0;
   int navigationCount = 0;
 
@@ -42,7 +42,8 @@ class UpdateContentTest extends AbstractAnalysisTest {
   void processNotification(Notification notification) {
     if (notification.event == ANALYSIS_ERRORS) {
       var decoded = new AnalysisErrorsParams.fromNotification(notification);
-      _format(AnalysisError e) => "${e.location.startLine}: ${e.message}";
+      String _format(AnalysisError e) =>
+          "${e.location.startLine}: ${e.message}";
       filesErrors[decoded.file] = decoded.errors.map(_format).toList();
     }
     if (notification.event == ANALYSIS_NAVIGATION) {