Fix a throw returning to a frame marked for lazy deopt that captures the stacktrace.

tests/language/vm/lazy_deopt_with_exception_and_stacktrace_test.dart

 // Copyright (c) 2016, 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.
 // Test deoptimization on an optimistically hoisted smi check.
 // VMOptions=--optimization-counter-threshold=10  --no-background-compilation --enable-inlining-annotations
 
 // Test that lazy deoptimization works if the program returns to a function
 // that is scheduled for lazy deoptimization via an exception.
 
 import 'package:expect/expect.dart';
@@ skipping 10 matching lines @@
   if (b) {
     c.x = 2.5;
     throw 123;
   }
 }
 
 @NeverInline
 T1(C c, bool b) {
   try {
     AA(c, b);
-  } on dynamic {
+  } on dynamic catch (e, st) {
+    print(e);
+    print(st);
+    Expect.isTrue(st is StackTrace, "is StackTrace");
   }
   return c.x + 1;
 }
 
 
 @NeverInline
 T2(C c, bool b) {
   try {
     AA(c, b);
-  } on String {
+  } on String catch(e, st) {
+    print(e);
+    print(st);
+    Expect.isTrue(st is StackTrace, "is StackTrace");
     Expect.isTrue(false);
-  } on int catch(e) {
+  } on int catch(e, st) {
     Expect.equals(e, 123);
     Expect.equals(b, true);
     Expect.equals(c.x, 2.5);
+    print(st);
+    Expect.isTrue(st is StackTrace, "is StackTrace");
   }
   return c.x + 1;
 }
 
 
 main() {
   var c = new C();
   for (var i = 0; i < 10000; ++i) {
     T1(c, false);
     T2(c, false);
   }
   Expect.equals(43, T1(c, false));
   Expect.equals(43, T2(c, false));
   Expect.equals(3.5, T1(c, true));
   Expect.equals(3.5, T2(c, true));
 }
-
-