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

tests/language/bool_test.dart

Index: tests/language/bool_test.dart
diff --git a/tests/language/bool_test.dart b/tests/language/bool_test.dart
index 166a0f169bdf9bdd7fbd306b70c419e923919cd4..8263d0abdc8ff515e5e25bdd1284b2b61c2c5094 100644
--- a/tests/language/bool_test.dart
+++ b/tests/language/bool_test.dart
@@ -116,14 +116,14 @@ class BoolTest {
     testOr(a, b, onTypeError) {
       try {
         return a || b;
-      } catch (TypeError t) {
+      } on TypeError catch (t) {
         return onTypeError;
       }
     }
     testAnd(a, b, onTypeError) {
       try {
         return a && b;
-      } catch (TypeError t) {
+      } on TypeError catch (t) {
         return onTypeError;
       }
     }