Add API function Dart_ZoneAllocate

runtime/vm/native_message_handler.cc

 // 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.
 
 #include "vm/native_message_handler.h"
 
 #include "vm/dart_api_message.h"
 #include "vm/isolate.h"
 #include "vm/message.h"
 #include "vm/snapshot.h"
@@ skipping 17 matching lines @@
 
 #if defined(DEBUG)
 void NativeMessageHandler::CheckAccess() {
   ASSERT(Isolate::Current() == NULL);
 }
 #endif
 
 
 static uint8_t* zone_allocator(
     uint8_t* ptr, intptr_t old_size, intptr_t new_size) {
-  ApiZone* zone = ApiNativeScope::Current()->zone();
+  ApiZone& zone = ApiNativeScope::Current()->zone();
   return reinterpret_cast<uint8_t*>(
-      zone->Reallocate(reinterpret_cast<uword>(ptr), old_size, new_size));
+      zone.Reallocate(reinterpret_cast<uword>(ptr), old_size, new_size));
 }
 
 
 static void RunWorker(uword parameter) {
   NativeMessageHandler* handler =
       reinterpret_cast<NativeMessageHandler*>(parameter);
 #if defined(DEBUG)
     handler->CheckAccess();
 #endif
 
@@ skipping 27 matching lines @@
 
 void NativeMessageHandler::StartWorker() {
   int result = Thread::Start(RunWorker, reinterpret_cast<uword>(this));
   if (result != 0) {
     FATAL1("Failed to start native message handler worker thread %d", result);
   }
 }
 
 
 }  // namespace dart