Disable allocation sinking in the presence of try-catch.

tests/language/try_catch_optimized2_test.dart

+// Copyright (c) 2013, 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.
+// VMOptions=--optimization-counter-threshold=10 --no-use-osr
+
+import "package:expect/expect.dart";
+
+// Test allocation sinking with optimized try-catch.
+
+bar() {  // Should not be inlined.
+  try {
+  } finally { }
+}
+
+foo(a) {
+  var r = 0;
+  for (var i in a) {
+    r += i;
+  }
+  try {
+    bar();
+  } finally {
+  }
+  return r;
+}
+
+main() {
+  var a = [1,2,3];
+  for (var i = 0; i < 20; i++) foo(a);
+  Expect.equals(6, foo(a));
+}