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

tests/language/getter_closure_execution_order_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.
 //
 // Test that a getter is evaluated after the arguments, when a getter is
 // for invoking a method. See chapter 'Method Invocation' in specification.
 
 var counter = 0;
 
 class Test1 {
@@ skipping 37 matching lines @@
 }
 
 main() {
   var failures = [];
   try {
     // Check instance getters.
     counter = 0;
     var o = new Test1();
     o.a(o.b());
     Expect.equals(2, counter);
-  } catch (var exc, var stack) {
+  } catch (exc, stack) {
     failures.add(exc);
     failures.add(stack);
   }
   try {
     // Check static getters.
     counter = 0;
     Test2.a(Test2.b());
     Expect.equals(2, counter);
-  } catch (var exc, var stack) {
+  } catch (exc, stack) {
     failures.add(exc);
     failures.add(stack);
   }
   try {
     // Check top-level getters.
     counter = 0;
     a(b());
     Expect.equals(2, counter);
-  } catch (var exc, var stack) {
+  } catch (exc, stack) {
     failures.add(exc);
     failures.add(stack);
   }
   // If any of the tests failed print out the details and fail the test.
   if (failures.length != 0) {
     for (var msg in failures) {
       print(msg.toString());
     }
     throw "${failures.length ~/ 2} tests failed.";
   }
 }