Relax zone allocation assertion

runtime/vm/allocation.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/allocation.h"
 
 #include "platform/assert.h"
 #include "vm/isolate.h"
 #include "vm/thread.h"
 #include "vm/zone.h"
 
 namespace dart {
 
 static void* Allocate(uword size, Zone* zone) {
   ASSERT(zone != NULL);
   if (size > static_cast<uword>(kIntptrMax)) {
     FATAL1("ZoneAllocated object has unexpectedly large size %" Pu "", size);
   }
   return reinterpret_cast<void*>(zone->AllocUnsafe(size));
 }
 
 
 void* ZoneAllocated::operator new(uword size) {
   return Allocate(size, Thread::Current()->zone());
 }
 
 
 void* ZoneAllocated::operator new(uword size, Zone* zone) {
-  ASSERT(zone == Thread::Current()->zone());
+  ASSERT(Thread::Current()->ZoneIsOwnedByThread(zone));
   return Allocate(size, zone);
 }
 
 
 StackResource::~StackResource() {
   if (thread_ != NULL) {
     StackResource* top = thread_->top_resource();
     ASSERT(top == this);
     thread_->set_top_resource(previous_);
   }
@@ skipping 40 matching lines @@
   thread()->IncrementNoSafepointScopeDepth();
 }
 
 
 NoSafepointScope::~NoSafepointScope() {
   thread()->DecrementNoSafepointScopeDepth();
 }
 #endif  // defined(DEBUG)
 
 }  // namespace dart