Simplify isolates access during stack iteration (WAS: Move SafeStackFrameIterator::active_count_...)

src/v8threads.h

 // Copyright 2008 the V8 project authors. All rights reserved.
 // Redistribution and use in source and binary forms, with or without
 // modification, are permitted provided that the following conditions are
 // met:
 //
 //     * Redistributions of source code must retain the above copyright
 //       notice, this list of conditions and the following disclaimer.
 //     * Redistributions in binary form must reproduce the above
 //       copyright notice, this list of conditions and the following
 //       disclaimer in the documentation and/or other materials provided
@@ skipping 60 matching lines @@
 };
 
 
 // Defined in top.h
 class ThreadLocalTop;
 
 
 class ThreadVisitor {
  public:
   // ThreadLocalTop may be only available during this call.
-  virtual void VisitThread(ThreadLocalTop* top) = 0;
+  virtual void VisitThread(Isolate* isolate, ThreadLocalTop* top) = 0;
 
  protected:
   virtual ~ThreadVisitor() {}
 };
 
 
 class ThreadManager {
  public:
   void Lock();
   void Unlock();
@@ skipping 63 matching lines @@
 
   void Run();
 
   bool keep_going_;
   int sleep_ms_;
 };
 
 } }  // namespace v8::internal
 
 #endif  // V8_V8THREADS_H_