Changes to pass the current isolate to all runtime and native calls.

runtime/vm/dart_api_state.h

 // Copyright (c) 2011, 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.
 
 #ifndef VM_DART_API_STATE_H_
 #define VM_DART_API_STATE_H_
 
 #include "include/dart_api.h"
 
 #include "vm/dart_api_impl.h"
@@ skipping 329 matching lines @@
     int total = 0;
     ApiLocalScope* scope = top_scope_;
     while (scope != NULL) {
       total += scope->zone().SizeInBytes();
       scope = scope->previous();
     }
     return total;
   }
   PersistentHandle* Null() {
     if (null_ == NULL) {
-      Zone zone;  // Setup a VM zone as we are creating some handles.
-      HandleScope scope;  // Setup a VM handle scope.
+      Isolate* isolate = Isolate::Current();
+      DARTSCOPE(isolate);
 
       Object& null_object = Object::Handle();
       null_ = persistent_handles().AllocateHandle();
       null_->set_raw(null_object);
       null_->set_callback(reinterpret_cast<void*>(&ProtectedHandleCallback));
     }
     return null_;
   }
   PersistentHandle* True() {
     if (true_ == NULL) {
-      Zone zone;  // Setup a VM zone as we are creating some handles.
-      HandleScope scope;  // Setup a VM handle scope.
+      Isolate* isolate = Isolate::Current();
+      DARTSCOPE(isolate);
 
       const Object& true_object = Object::Handle(Bool::True());
       true_ = persistent_handles().AllocateHandle();
       true_->set_raw(true_object);
       true_->set_callback(reinterpret_cast<void*>(&ProtectedHandleCallback));
     }
     return true_;
   }
   PersistentHandle* False() {
     if (false_ == NULL) {
-      Zone zone;  // Setup a VM zone as we are creating some handles.
-      HandleScope scope;  // Setup a VM handle scope.
+      Isolate* isolate = Isolate::Current();
+      DARTSCOPE(isolate);
 
       const Object& false_object = Object::Handle(Bool::False());
       false_ = persistent_handles().AllocateHandle();
       false_->set_raw(false_object);
       false_->set_callback(reinterpret_cast<void*>(&ProtectedHandleCallback));
     }
     return false_;
   }
 
  private:
   PersistentHandles persistent_handles_;
   ApiLocalScope* top_scope_;
 
   // Persistent handles to important objects.
   PersistentHandle* null_;
   PersistentHandle* true_;
   PersistentHandle* false_;
 
   DISALLOW_COPY_AND_ASSIGN(ApiState);
 };
 
 }  // namespace dart
 
 #endif  // VM_DART_API_STATE_H_