Removed RuntimeProfilerRateLimiter class and RuntimeProfiler::IsSomeIsolateInJS.

src/platform-macos.cc

Index: src/platform-macos.cc
diff --git a/src/platform-macos.cc b/src/platform-macos.cc
index e69833885cbaad2284feac6d93f7b32fa0573c98..20db4e4738433fba1794a9fd7c716896f71c7f8d 100644
--- a/src/platform-macos.cc
+++ b/src/platform-macos.cc
@@ -792,7 +792,7 @@ 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_);
     }
@@ -851,7 +851,6 @@ class SamplerThread : public Thread {
   }
 
   const int interval_;
-  RuntimeProfilerRateLimiter rate_limiter_;
 
   // Protects the process wide state below.
   static Mutex* mutex_;