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

tests/language/type_checks_in_factory_method_test.dart

Index: tests/language/type_checks_in_factory_method_test.dart
diff --git a/tests/language/type_checks_in_factory_method_test.dart b/tests/language/type_checks_in_factory_method_test.dart
index 13686d5fdeac1b72d3d7b1f46fe056abbf8a360e..8a554277bd0d6f0e413c1cdc3ba8bbe34f549f27 100644
--- a/tests/language/type_checks_in_factory_method_test.dart
+++ b/tests/language/type_checks_in_factory_method_test.dart
@@ -32,7 +32,7 @@ main() {
 
   try {
     Foo<int> value2 = new Foo<int>.from();
-  } catch (TypeError e) {
+  } on TypeError catch (e) {
     gotError = true;
   }
   Expect.equals(true, gotError);