add type completions after "on" in a try block

pkg/analysis_server/test/services/completion/completion_test_util.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.services.completion.util;
 
 import 'dart:async';
 
 import 'package:analysis_server/src/protocol.dart' as protocol
     show Element, ElementKind;
@@ skipping 1527 matching lines @@
       assertNotSuggested('_c');
       assertSuggestLocalVariable('a', 'A');
       assertSuggestLocalClass('A');
       assertSuggestLocalClass('X');
       // top level results are partially filtered
       //assertSuggestImportedClass('Object');
       assertNotSuggested('==');
     });
   }
 
+  test_CatchClause_onType() {
+    // TypeName  CatchClause  TryStatement
+    addTestSource('class A {a() {try{var x;} on ^ {}}}');
+    computeFast();
+    return computeFull((bool result) {
+      expect(request.replacementOffset, completionOffset);
+      expect(request.replacementLength, 0);
+      assertSuggestLocalClass('A');
+      assertSuggestImportedClass('Object');
+      assertNotSuggested('a');
+      assertNotSuggested('x');
+    });
+  }
+
+  test_CatchClause_onType_noBrackets() {
+    // TypeName  CatchClause  TryStatement
+    addTestSource('class A {a() {try{var x;} on ^}}');
+    computeFast();
+    return computeFull((bool result) {
+      expect(request.replacementOffset, completionOffset);
+      expect(request.replacementLength, 0);
+      assertSuggestLocalClass('A');
+      assertSuggestImportedClass('Object');
+      assertNotSuggested('x');
+    });
+  }
+
   test_CatchClause_typed() {
     // Block  CatchClause  TryStatement
     addTestSource('class A {a() {try{var x;} on E catch (e) {^}}}');
     computeFast();
     return computeFull((bool result) {
       expect(request.replacementOffset, completionOffset);
       expect(request.replacementLength, 0);
       assertSuggestParameter('e', 'E');
       assertSuggestLocalMethod('a', 'A', null);
       assertSuggestImportedClass('Object');
@@ skipping 2151 matching lines @@
       assertNotSuggested('bar2');
       assertNotSuggested('_B');
       assertSuggestLocalClass('Y');
       assertSuggestLocalClass('C');
       assertSuggestLocalVariable('f', null);
       assertNotSuggested('x');
       assertNotSuggested('e');
     });
   }
 }