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

tests/language/local_function_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.
 // Dart test program testing closures.
 
 class LocalFunctionTest {
   LocalFunctionTest() : field1 = 100, field2_ = 200  { }
   static int f(int n) {
     int a = 0;
     g(int m) {
@@ skipping 124 matching lines @@
 
   static testExceptions() {
     var f = (int n) => n + 1;
     Expect.equals(2, f(1));
     Expect.equals(true, f is Function);
     Expect.equals(true, f is Object);
     Expect.equals(true, f.toString().startsWith("Closure"));
     bool exception_caught = false;
     try {
       f(1, 2);
-    } catch (ClosureArgumentMismatchException e) {
+    } on ClosureArgumentMismatchException catch (e) {
       exception_caught = true;
     }
     Expect.equals(true, exception_caught);
     exception_caught = false;
     try {
       f();
-    } catch (ClosureArgumentMismatchException e) {
+    } on ClosureArgumentMismatchException catch (e) {
       exception_caught = true;
     }
     Expect.equals(true, exception_caught);
     exception_caught = false;
     try {
       f.xyz(0);
-    } catch (NoSuchMethodException e) {
+    } on NoSuchMethodException catch (e) {
       exception_caught = true;
     }
     Expect.equals(true, exception_caught);
 
     // Overwrite closure value.
     f = 3;
     exception_caught = false;
     try {
       f(1);
-    } catch (ObjectNotClosureException e) {
+    } on ObjectNotClosureException catch (e) {
       exception_caught = true;
     }
     Expect.equals(true, exception_caught);
 
     // Do not expect any exceptions to be thrown.
     var g = ([int n = 1]) => n + 1;
     Expect.equals(2, g());
     Expect.equals(3, g(2));
   }
 
@@ skipping 15 matching lines @@
     Expect.equals(99, doThis(10, int f(n) => n * n - 1));
     Expect.equals(99, doThis(10, (n) => n * n - 1));
     Expect.equals(99, doThis(10, f(n) => n * n - 1));
     testExceptions();
   }
 }
 
 main() {
   LocalFunctionTest.testMain();
 }