Rename CastException to CastError.

tests/language/type_error_test.dart

Index: tests/language/type_error_test.dart
diff --git a/tests/language/type_error_test.dart b/tests/language/type_error_test.dart
index 54a566d67aec0cfc2ff299d9c92c3e21d2ee6b03..18d72cec10bb82e620507510e4cbae0c2c562e76 100644
--- a/tests/language/type_error_test.dart
+++ b/tests/language/type_error_test.dart
@@ -153,11 +153,11 @@ checkCastError(o) {
   } on TypeError catch (e) {
     print('unexpected type error: ${NoSuchMethodError.safeToString(e)}');
     throw; // Unexpected type error.
-  } on CastException catch (e) {
+  } on CastError catch (e) {
     print(e); // This might provoke an error.
     return; // Expected a cast error.
   }
-  throw 'expected CastException';
+  throw 'expected CastError';
 }
 
 bool assertionsEnabled = false;