Removed RuntimeProfilerRateLimiter class and RuntimeProfiler::IsSomeIsolateInJS.

src/platform-cygwin.cc

Index: src/platform-cygwin.cc
diff --git a/src/platform-cygwin.cc b/src/platform-cygwin.cc
index 8c5e5b9083bb5a7931833eb69ca5782267dc32d9..3456d32a6e3b3e528d8b854f2d0ce4d540827421 100644
--- a/src/platform-cygwin.cc
+++ b/src/platform-cygwin.cc
@@ -660,7 +660,7 @@ class SamplerThread : public Thread {
       if (state == SamplerRegistry::HAS_CPU_PROFILING_SAMPLERS) {
         SamplerRegistry::IterateActiveSamplers(&DoCpuProfile, this);
       } else {
-        if (rate_limiter_.SuspendIfNecessary()) continue;
+        if (RuntimeProfiler::WaitForSomeIsolateToEnterJS()) continue;
       }
       OS::Sleep(interval_);
     }
@@ -708,7 +708,6 @@ class SamplerThread : public Thread {
   }
 
   const int interval_;
-  RuntimeProfilerRateLimiter rate_limiter_;
 
   // Protects the process wide state below.
   static Mutex* mutex_;