VM: Make optimized try-catch work in DBC.

tests/corelib/big_integer_arith_vm_test.dart

 // Copyright (c) 2011, 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.
 
 // Testing Bigints with and without intrinsics.
 // VMOptions=
 // VMOptions=--no_intrinsify
+// VMOptions=--no-background-compilation
 // VMOptions=--optimization_counter_threshold=10 --no-background_compilation
 
 library big_integer_test;
 import "package:expect/expect.dart";
 
 foo() => 1234567890123456789;
 bar() => 12345678901234567890;
 
 testSmiOverflow() {
   var a = 1073741823;
@@ skipping 416 matching lines @@
     testBigintNegate();  /// negate: ok
     testShiftAmount();  /// shift: ok
     Expect.equals(12345678901234567890, (12345678901234567890).abs());
     Expect.equals(12345678901234567890, (-12345678901234567890).abs());
     var a = 10000000000000000000;
     var b = 10000000000000000001;
     Expect.equals(false, a.hashCode == b.hashCode);
     Expect.equals(true, a.hashCode == (b - 1).hashCode);
   }
 }