Removed RuntimeProfilerRateLimiter class and RuntimeProfiler::IsSomeIsolateInJS.

src/runtime-profiler.h

Index: src/runtime-profiler.h
diff --git a/src/runtime-profiler.h b/src/runtime-profiler.h
index 507535f0b4d38e3e0c87e97064eec7f4979077be..62c48c7a49bdfb49350eefb636c3d44371324c9b 100644
--- a/src/runtime-profiler.h
+++ b/src/runtime-profiler.h
@@ -71,17 +71,12 @@ class RuntimeProfiler {
 
   // 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
@@ -134,24 +129,6 @@ class RuntimeProfiler {
 };
 
 
-// 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) {