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

tests/language/type_variable_identifier_expression_negative_test.dart

Index: tests/language/type_variable_identifier_expression_negative_test.dart
diff --git a/tests/language/type_variable_identifier_expression_negative_test.dart b/tests/language/type_variable_identifier_expression_negative_test.dart
index df88b70e1e7303aa9746295d18277c0045935453..427291c311a994d99e0692c35c7ca895a7f8d01a 100644
--- a/tests/language/type_variable_identifier_expression_negative_test.dart
+++ b/tests/language/type_variable_identifier_expression_negative_test.dart
@@ -10,7 +10,7 @@ class A {
 }
 
 class B<T> {
-  doFunc() { 
+  doFunc() {
     T.func(); // illegal to use type variable as an identifier expression
   }
 }
@@ -19,7 +19,7 @@ main() {
   try {
     var buf = new B<A>().doFunc();
     print(buf);
-  } catch (Exception e) {
+  } on Exception catch (e) {
     // should be an uncatchable compile-time error,
   }
 }