Current HandleScope moving to Isolate.

src/handles-inl.h

Index: src/handles-inl.h
diff --git a/src/handles-inl.h b/src/handles-inl.h
index 8478bb5cd949b0472c96643661066c4f45f595fd..f5382bdd28d89ae18d3dbccc819323d81a5d70ed 100644
--- a/src/handles-inl.h
+++ b/src/handles-inl.h
@@ -54,7 +54,7 @@ inline T* Handle<T>::operator*() const {
 #ifdef DEBUG
 inline NoHandleAllocation::NoHandleAllocation() {
   v8::ImplementationUtilities::HandleScopeData* current =
-      v8::ImplementationUtilities::CurrentHandleScope();
+      Isolate::Current()->handle_scope_data();
   extensions_ = current->extensions;
   // Shrink the current handle scope to make it impossible to do
   // handle allocations without an explicit handle scope.
@@ -66,7 +66,7 @@ inline NoHandleAllocation::NoHandleAllocation() {
 inline NoHandleAllocation::~NoHandleAllocation() {
   // Restore state in current handle scope to re-enable handle
   // allocations.
-  v8::ImplementationUtilities::CurrentHandleScope()->extensions = extensions_;
+  Isolate::Current()->handle_scope_data()->extensions = extensions_;
 }
 #endif