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

tests/corelib/indexed_list_access_test.dart

Index: tests/corelib/indexed_list_access_test.dart
diff --git a/tests/corelib/indexed_list_access_test.dart b/tests/corelib/indexed_list_access_test.dart
index f2ed091fef17f5bcd9f67c6782eb41f20020f162..0cd7d48a7dba7d545bce7d84204d0ca7343708f9 100644
--- a/tests/corelib/indexed_list_access_test.dart
+++ b/tests/corelib/indexed_list_access_test.dart
@@ -32,9 +32,9 @@ checkList(var list) {
 checkCatch(var f, var list, var index) {
   try {
     f(list, index);
-  } catch (IllegalArgumentException e) {
+  } on IllegalArgumentException catch (e) {
     return true;
-  } catch (TypeError t) {
+  } on TypeError catch (t) {
     return true;  // thrown in type checked mode.
   }
   return false;