Removed RuntimeProfilerRateLimiter class and RuntimeProfiler::IsSomeIsolateInJS.

src/runtime-profiler.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 53 matching lines @@
   // Rate limiting support.
 
   // VM thread interface.
   //
   // Called by isolates when their states change.
   static inline void IsolateEnteredJS(Isolate* isolate);
   static inline void IsolateExitedJS(Isolate* isolate);
 
   // Profiler thread interface.
   //
-  // IsSomeIsolateInJS():
-  // The profiler thread can query whether some isolate is currently
-  // running JavaScript code.
-  //
   // WaitForSomeIsolateToEnterJS():
   // When no isolates are running JavaScript code for some time the
   // profiler thread suspends itself by calling the wait function. The
   // wait function returns true after it waited or false immediately.
   // While the function was waiting the profiler may have been
   // disabled so it *must check* whether it is allowed to continue.
-  static bool IsSomeIsolateInJS();
   static bool WaitForSomeIsolateToEnterJS();
 
   // Stops the runtime profiler thread when profiling support is being
   // turned off.
   static void StopRuntimeProfilerThreadBeforeShutdown(Thread* thread);
 
   void UpdateSamplesAfterScavenge();
   void RemoveDeadSamples();
   void UpdateSamplesAfterCompact(ObjectVisitor* visitor);
 
@@ skipping 32 matching lines @@
   //   0 or positive => the number of isolates running JavaScript code.
   static Atomic32 state_;
 
 #ifdef DEBUG
   static bool has_been_globally_set_up_;
 #endif
   static bool enabled_;
 };
 
 
-// Rate limiter intended to be used in the profiler thread.
-class RuntimeProfilerRateLimiter BASE_EMBEDDED {
- public:
-  RuntimeProfilerRateLimiter() {}
-
-  // Suspends the current thread (which must be the profiler thread)
-  // when not executing JavaScript to minimize CPU usage. Returns
-  // whether the thread was suspended (and so must check whether
-  // profiling is still active.)
-  //
-  // Does nothing when runtime profiling is not enabled.
-  bool SuspendIfNecessary();
-
- private:
-  DISALLOW_COPY_AND_ASSIGN(RuntimeProfilerRateLimiter);
-};
-
-
 // Implementation of RuntimeProfiler inline functions.
 
 void RuntimeProfiler::IsolateEnteredJS(Isolate* isolate) {
   Atomic32 new_state = NoBarrier_AtomicIncrement(&state_, 1);
   if (new_state == 0) {
     // Just incremented from -1 to 0. -1 can only be set by the
     // profiler thread before it suspends itself and starts waiting on
     // the semaphore.
     HandleWakeUp(isolate);
   }
   ASSERT(new_state >= 0);
 }
 
 
 void RuntimeProfiler::IsolateExitedJS(Isolate* isolate) {
   Atomic32 new_state = NoBarrier_AtomicIncrement(&state_, -1);
   ASSERT(new_state >= 0);
   USE(new_state);
 }
 
 } }  // namespace v8::internal
 
 #endif  // V8_RUNTIME_PROFILER_H_