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

tests/language/call_through_null_getter_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.
 
 // Tests that we can call functions through getters which return null.
 
 const TOP_LEVEL_NULL = null;
 
 var topLevel;
 
@@ skipping 52 matching lines @@
           " got: ${exception}");
     }
   }
 
   static catchException(fn) {
     bool caught = false;
     var result = null;
     try {
       fn();
       Expect.equals(true, false);  // Shouldn't reach this.
-    } catch (var e) {
+    } catch (e) {
       caught = true;
       result = e;
     }
     Expect.equals(true, caught);
     return result;
   }
 
 }
 
 
 class A {
 
   A() { }
   var field;
   get getter { return field; }
   method() { return field; }
 
 }
 
 main() {
   CallThroughNullGetterTest.testMain();
 }