Changed StackZone and ApiZone to be containers for Zone.

runtime/vm/code_descriptors_test.cc

Index: runtime/vm/code_descriptors_test.cc
diff --git a/runtime/vm/code_descriptors_test.cc b/runtime/vm/code_descriptors_test.cc
index 7b066b934925c2d94d909bd1ed0b8504024cb34c..f2a57f64cf3ec41ac32cef61d1ec565cf5333424 100644
--- a/runtime/vm/code_descriptors_test.cc
+++ b/runtime/vm/code_descriptors_test.cc
@@ -192,6 +192,7 @@ static void NativeFunc(Dart_NativeArguments args) {
   EXPECT_VALID(Dart_IntegerToInt64(k, &value));
   EXPECT_EQ(20, value);
   Isolate::Current()->heap()->CollectAllGarbage();
+  Dart_ExitScope();
 }
 
 
@@ -281,6 +282,8 @@ TEST_CASE(StackmapGC) {
   Object& result = Object::Handle();
   result = DartEntry::InvokeStatic(function_foo, arguments, kNoArgumentNames);
   EXPECT(!result.IsError());
+  (void) kNoArgumentNames;

[siva, 2012/10/12 20:40:21]

we have a macro USE for silencing compiler warnings if that is what you are
trying to get rid of here.

Why was this not a problem before.

[Tom Ball, 2012/10/12 22:56:51]

It wasn't a problem, just debugging cruft that's now removed.

+  (void) result;
 }
 
 }  // namespace dart