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

runtime/tests/vm/dart/isolate_mirror_local_test.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.
 //
 // Dart test program for checking implemention of MirrorSystem when
 // inspecting the current isolate.
 
 #library('isolate_mirror_local_test');
 
 #import('dart:isolate');
@@ skipping 350 matching lines @@
   int method(int arg) {
     return arg + value;
   }
 }
 
 void testCustomInstanceMirror(InstanceMirror mirror) {
   Expect.isTrue(mirror.hasReflectee);
   bool saw_exception = false;
   try {
     mirror.reflectee;
-  } catch (MirrorException me) {
+  } on MirrorException catch (me) {
     saw_exception = true;
   }
   Expect.isFalse(saw_exception);
   Expect.equals("InstanceMirror on instance of 'MyClass'", mirror.toString());
 
   ClassMirror cls = mirror.type;
   Expect.isTrue(cls is ClassMirror);
   Expect.equals('MyClass', cls.simpleName);
   Expect.equals('MySuperClass', cls.superclass.simpleName);
   Expect.isTrue(cls.defaultFactory === null);
@@ skipping 106 matching lines @@
   // Test that an isolate can reflect on itself.
   mirrorSystemOf(exit_port.toSendPort()).then(testMirrorSystem);
 
   testIntegerInstanceMirror(reflect(1001));
   testStringInstanceMirror(reflect('This\nis\na\nString'));
   testBoolInstanceMirror(reflect(true));
   testNullInstanceMirror(reflect(null));
   testCustomInstanceMirror(reflect(new MyClass(17)));
   testMirrorErrors(currentMirrorSystem());
 }