Fix product build

runtime/vm/object.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/object.h"
 
 #include "include/dart_api.h"
 #include "platform/assert.h"
 #include "vm/assembler.h"
 #include "vm/become.h"
@@ skipping 10533 matching lines @@
 
 
 // Create a private key for this library. It is based on the hash of the
 // library URI and the sequence number of the library to guarantee unique
 // private keys without having to verify.
 void Library::AllocatePrivateKey() const {
   Thread* thread = Thread::Current();
   Zone* zone = thread->zone();
   Isolate* isolate = thread->isolate();
 
-  if (isolate->IsReloading()) {
+  if (FLAG_support_reload && isolate->IsReloading()) {
     // When reloading, we need to make sure we use the original private key
     // if this library previously existed.
     IsolateReloadContext* reload_context = isolate->reload_context();
     const String& original_key =
         String::Handle(reload_context->FindLibraryPrivateKey(*this));
     if (!original_key.IsNull()) {
       StorePointer(&raw_ptr()->private_key_, original_key.raw());
       return;
     }
   }
@@ skipping 12101 matching lines @@
   return UserTag::null();
 }
 
 
 const char* UserTag::ToCString() const {
   const String& tag_label = String::Handle(label());
   return tag_label.ToCString();
 }
 
 }  // namespace dart