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

tests/language/named_parameters_type_test.dart

Index: tests/language/named_parameters_type_test.dart
diff --git a/tests/language/named_parameters_type_test.dart b/tests/language/named_parameters_type_test.dart
index a6a87b2481692e428ecf7a65f01b6cb41780303f..8d0b5d1fcfe0921134bacce5f0735380b1894208 100644
--- a/tests/language/named_parameters_type_test.dart
+++ b/tests/language/named_parameters_type_test.dart
@@ -21,21 +21,21 @@ class NamedParametersTypeTest {
     acceptFunNumOptBool(funNumOptBool);  // No error.
     try {
       acceptFunNumOptBool(funNum);  // No static type warning.
-    } catch (TypeError error) {
+    } on TypeError catch (error) {
       result += 1;
       Expect.stringEquals("(num, [b: bool]) => void", error.dstType);
       Expect.stringEquals("(num) => void", error.srcType);
     }
     try {
       acceptFunNumOptBool(funNumBool);  /// static type warning
-    } catch (TypeError error) {
+    } on TypeError catch (error) {
       result += 10;
       Expect.stringEquals("(num, [b: bool]) => void", error.dstType);
       Expect.stringEquals("(num, bool) => void", error.srcType);
     }
     try {
       acceptFunNumOptBool(funNumOptBoolX);  /// static type warning
-    } catch (TypeError error) {
+    } on TypeError catch (error) {
       result += 100;
       Expect.stringEquals("(num, [b: bool]) => void", error.dstType);
       Expect.stringEquals("(num, [x: bool]) => void", error.srcType);