Pass in the isolate parameter to the weak persistent callback handler so that

runtime/vm/dart_api_impl.cc

 // Copyright (c) 2013, 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 "include/dart_api.h"
 #include "include/dart_mirrors_api.h"
 #include "include/dart_native_api.h"
 
 #include "platform/assert.h"
 #include "vm/bigint_operations.h"
@@ skipping 656 matching lines @@
   ASSERT(state != NULL);
   PersistentHandle* ref = PersistentHandle::Cast(object);
   ASSERT(!state->IsProtectedHandle(ref));
   if (!state->IsProtectedHandle(ref)) {
     state->persistent_handles().FreeHandle(ref);
   }
 }
 
 
 DART_EXPORT void Dart_DeleteWeakPersistentHandle(
+    Dart_Isolate current_isolate,
     Dart_WeakPersistentHandle object) {
-  Isolate* isolate = Isolate::Current();
+  Isolate* isolate = reinterpret_cast<Isolate*>(current_isolate);
   CHECK_ISOLATE(isolate);
+  ASSERT(isolate == Isolate::Current());
   ApiState* state = isolate->api_state();
   ASSERT(state != NULL);
   if (FinalizablePersistentHandle::IsPrologueWeakPersistentHandle(object)) {
     ASSERT(state->IsValidPrologueWeakPersistentHandle(object));
     FinalizablePersistentHandle* weak_ref =
         FinalizablePersistentHandle::Cast(object);
     state->prologue_weak_persistent_handles().FreeHandle(weak_ref);
   } else {
     ASSERT(!state->IsValidPrologueWeakPersistentHandle(object));
     FinalizablePersistentHandle* weak_ref =
@@ skipping 3921 matching lines @@
 
 
 DART_EXPORT void Dart_RegisterRootServiceRequestCallback(
     const char* name,
     Dart_ServiceRequestCallback callback,
     void* user_data) {
   Service::RegisterRootEmbedderCallback(name, callback, user_data);
 }
 
 }  // namespace dart