[d8 Workers] Fix bug creating Worker during main thread termination

src/d8.h

 // Copyright 2012 the V8 project authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef V8_D8_H_
 #define V8_D8_H_
 
 #ifndef V8_SHARED
 #include "src/allocation.h"
 #include "src/hashmap.h"
@@ skipping 266 matching lines @@
 
   void ExecuteInThread();
   static void PostMessageOut(const v8::FunctionCallbackInfo<v8::Value>& args);
 
   base::Semaphore in_semaphore_;
   base::Semaphore out_semaphore_;
   SerializationDataQueue in_queue_;
   SerializationDataQueue out_queue_;
   base::Thread* thread_;
   char* script_;
-  base::Atomic32 state_;
-  base::Atomic32 join_called_;
+  State state_;
 };
 #endif  // !V8_SHARED
 
 
 class ShellOptions {
  public:
   ShellOptions()
       : script_executed(false),
         last_run(true),
         send_idle_notification(false),
@@ skipping 197 matching lines @@
   static void RunShell(Isolate* isolate);
   static bool SetOptions(int argc, char* argv[]);
   static Local<ObjectTemplate> CreateGlobalTemplate(Isolate* isolate);
 };
 
 
 }  // namespace v8
 
 
 #endif  // V8_D8_H_