remove Isolate::Current from most files starting with 's' through 'v'

src/v8threads.h

 // Copyright 2012 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 128 matching lines @@
 };
 
 
 // The ContextSwitcher thread is used to schedule regular preemptions to
 // multiple running V8 threads. Generally it is necessary to call
 // StartPreemption if there is more than one thread running. If not, a single
 // JavaScript can take full control of V8 and not allow other threads to run.
 class ContextSwitcher: public Thread {
  public:
   // Set the preemption interval for the ContextSwitcher thread.
-  static void StartPreemption(int every_n_ms);
+  static void StartPreemption(Isolate* isolate, int every_n_ms);
 
   // Stop sending preemption requests to threads.
-  static void StopPreemption();
+  static void StopPreemption(Isolate* isolate);
 
   // Preempted thread needs to call back to the ContextSwitcher to acknowledge
   // the handling of a preemption request.
   static void PreemptionReceived();
 
  private:
   ContextSwitcher(Isolate* isolate, int every_n_ms);
 
   Isolate* isolate() const { return isolate_; }
 
   void Run();
 
   bool keep_going_;
   int sleep_ms_;
   Isolate* isolate_;
 };
 
 } }  // namespace v8::internal
 
 #endif  // V8_V8THREADS_H_