Minor cleanup

runtime/vm/thread_interrupter.h

 // Copyright (c) 2013, 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.
 
 #ifndef VM_THREAD_INTERRUPTER_H_
 #define VM_THREAD_INTERRUPTER_H_
 
 #include "vm/allocation.h"
 #include "vm/signal_handler.h"
 #include "vm/os_thread.h"
 #include "vm/thread.h"
 
 namespace dart {
 
+struct InterruptedThreadState {
+  uintptr_t pc;
+  uintptr_t csp;
+  uintptr_t dsp;
+  uintptr_t fp;
+  uintptr_t lr;
+};
+
+
 class ThreadInterrupter : public AllStatic {
  public:
   static void InitOnce();
 
   static void Startup();
   static void Shutdown();
 
   // Delay between interrupts.
   static void SetInterruptPeriod(intptr_t period);
 
@@ skipping 11 matching lines @@
   static bool woken_up_;
   static ThreadJoinId interrupter_thread_id_;
   static Monitor* monitor_;
   static intptr_t interrupt_period_;
   static intptr_t current_wait_time_;
 
   static bool InDeepSleep() {
     return current_wait_time_ == Monitor::kNoTimeout;
   }
 
-  static void UpdateStateObject(ThreadInterruptCallback callback, void* data);
-
   static void ThreadMain(uword parameters);
 
   static void InstallSignalHandler();
 
   static void RemoveSignalHandler();
 
   friend class ThreadInterrupterVisitIsolates;
 };
 
 }  // namespace dart
 
 #endif  // VM_THREAD_INTERRUPTER_H_