Rewrite the negative try-catch tests into a single multi test.

tests/language/src/TryCatchSyntaxTest.dart

+// Copyright (c) 2012, the Dart project authors.  Please see the AUTHORS file
+// for details. All rights reserved. Use of this source code is governed by a
+// BSD-style license that can be found in the LICENSE file.
+
+main() {
+  testMissingCatch();
+  testMissingTry();
+  testDuplicateCatchVariable();
+  testIllegalFinally();
+  testIllegalCatch();
+  testIllegalRethrow();
+}
+
+testMissingCatch() {
+  try { }  /// 01: compile-time error
+}
+
+testMissingTry() {
+  catch (Exception e) { }                   /// 02: compile-time error
+  catch (Exception e, StackTrace trace) { } /// 03: compile-time error
+  finally { }                               /// 04: compile-time error
+}
+
+testDuplicateCatchVariable() {
+  try { } catch (Exception e, StackTrace e) { } /// 05: compile-time error
+}
+
+testIllegalFinally() {
+  try { } finally (e) { } /// 06: compile-time error
+}
+
+testIllegalCatch() {
+  try { } catch () { }           /// 07: compile-time error
+  try { } catch (e) { }          /// 08: compile-time error
+  try { } catch (MammaMia e) { } /// 09: compile-time error
+}
+
+testIllegalRethrow() {
+  try { throw; } catch (var e) { }             /// 10: compile-time error
+  try { } catch (var e) { } finally { throw; } /// 11: compile-time error
+}