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

tests/language/private_main.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.
 // Dart test for testing access to private fields.
 
 main() {
   PrivateMain.main();
 }
 
 class PrivateMain {
 
   static const _myPrecious = "A Ring";
 
   static accessMyPrivates() {
     var value = 0;
     try {
       value = _myPrecious;
-    } catch (var e) {
+    } catch (e) {
       value = -1;
     }
     Expect.equals("A Ring", value);
   }
 
   static accessMyLibPrivates() {
     var value = 0;
     var the_other = new PrivateOther();
     try {
       value = the_other._myPrecious;
-    } catch (var e, var trace) {
+    } catch (e, trace) {
       print(e);
       print(trace);
       Expect.equals(true, e is NoSuchMethodException);
       value = -1;
     }
     Expect.equals("Another Ring", value);
   }
 
   static accessOtherLibPrivates() {
     var value = 0;
     var the_other = new PrivateLib();
     try {
       value = the_other._myPrecious;
-    } catch (var e, var trace) {
+    } catch (e, trace) {
       print(e);
       print(trace);
       Expect.equals(true, e is NoSuchMethodException);
       value = -1;
     }
     Expect.equals(-1, value);
   }
 
   static main() {
     accessMyPrivates();
     accessMyLibPrivates();
     accessOtherLibPrivates();
   }
 }