add type completions after "on" in a try block

pkg/analysis_server/test/completion_test.dart

 // Copyright (c) 2014, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
 library test.completion.support;
 
 import 'dart:async';
 import 'dart:collection';
 
 import 'package:unittest/unittest.dart';
@@ skipping 1909 matching lines @@
       "2+x",
       "3+zs",
       "4+k",
       "5+Q",
       "5-a",
       "6+==",
       "7+x",
       "8+==",
       "9+==",
       "0+k"
-    ], failingTests: '5689');
+    ], failingTests: '689');
 
     // keywords
     buildTests('test014', '''
 class Q {
   bool x;
   List zs;
   int k;
   !Dvar a;
   !Evoid mth() {
     !1while (z) { !Gcontinue; };
@@ skipping 152 matching lines @@
         'test027', '''m(){try{}catch(eeee,ssss){s!1}''', <String>["1+ssss"]);
 
     buildTests('test028', '''m(){var isX=3;if(is!1)''', <String>["1+isX"]);
 
     buildTests('test029', '''m(){[1].forEach((x)=>!1x);}''', <String>["1+x"]);
 
     buildTests('test030', '''n(){[1].forEach((x){!1});}''', <String>["1+x"]);
 
     buildTests('test031',
         '''class Caster {} m() {try {} on Cas!1ter catch (CastBlock) {!2}}''',
-        <String>["1+Caster", "1-CastBlock", "2+Caster", "2+CastBlock"],
-        failingTests: '1');
+        <String>["1+Caster", "1-CastBlock", "2+Caster", "2+CastBlock"]);
 
     buildTests('test032', '''
 const ONE = 1;
 const ICHI = 10;
 const UKSI = 100;
 const EIN = 1000;
 m() {
   int x;
   switch (x) {
     case !3ICHI:
@@ skipping 175 matching lines @@
       } else {
         ++expectedPassCount;
         tester(testName, () {
           CompletionTestCase test = new CompletionTestCase();
           return test.runTest(spec, extraFiles);
         });
       }
     }
   }
 }