Use new try-catch syntax in runtime/, tools/, and utils/.

tools/testing/dart/test_options.dart

 // Copyright (c) 2012, 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_options_parser");
 
 #import("dart:io");
 #import("dart:math");
 #import("drt_updater.dart");
 #import("test_suite.dart");
@@ skipping 328 matching lines @@
       // Parse the value for the option.
       if (spec.type == 'bool') {
         if (!value.isEmpty()) {
           print('No value expected for bool option $name');
           exit(1);
         }
         configuration[spec.name] = true;
       } else if (spec.type == 'int') {
         try {
           configuration[spec.name] = parseInt(value);
-        } catch (var e) {
+        } catch (e) {
           print('Integer value expected for int option $name');
           exit(1);
         }
       } else {
         assert(spec.type == 'string');
         if (!spec.values.isEmpty()) {
           for (var v in value.split(',')) {
             if (spec.values.lastIndexOf(v) == -1) {
               print('Unknown value ($v) for option $name');
               exit(1);
@@ skipping 273 matching lines @@
         return option;
       }
     }
     print('Unknown test option $name');
     exit(1);
   }
 
 
   List<_TestOptionSpecification> _options;
 }