Update almost all tests (except co19) to use the new try-catch syntax.

tests/corelib/list_test.dart

 // Copyright (c) 2011, 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.
 
 class ListTest {
 
   static testMain() {
     testList();
     testExpandableList();
   }
@@ skipping 72 matching lines @@
     Expect.equals(3, list.lastIndexOf(100));
     list[3] = 3;
     Expect.equals(-1, list.indexOf(100));
     Expect.equals(-1, list.lastIndexOf(100));
 
     testClosures(list);
 
     var exception = null;
     try {
       list.clear();
-    } catch (UnsupportedOperationException e) {
+    } on UnsupportedOperationException catch (e) {
       exception = e;
     }
     Expect.equals(true, exception != null);
   }
 
   static void testExpandableList() {
     List list = new List();
     Expect.equals(true, list.isEmpty());
     Expect.equals(list.length, 0);
     list.add(4);
@@ skipping 39 matching lines @@
   }
 }
 
 class Yes {
   operator ==(var other) => true;
 }
 
 main() {
   ListTest.testMain();
 }