Use count-based profiling exclusively.

src/platform-macos.cc

Index: src/platform-macos.cc
diff --git a/src/platform-macos.cc b/src/platform-macos.cc
index 22d2bcfe76b1dca86b68df1758aaa973022b563d..e69833885cbaad2284feac6d93f7b32fa0573c98 100644
--- a/src/platform-macos.cc
+++ b/src/platform-macos.cc
@@ -787,24 +787,13 @@ class SamplerThread : public Thread {
     SamplerRegistry::State state;
     while ((state = SamplerRegistry::GetState()) !=
            SamplerRegistry::HAS_NO_SAMPLERS) {
-      bool cpu_profiling_enabled =
-          (state == SamplerRegistry::HAS_CPU_PROFILING_SAMPLERS);
-      bool runtime_profiler_enabled = RuntimeProfiler::IsEnabled();
       // When CPU profiling is enabled both JavaScript and C++ code is
       // profiled. We must not suspend.
-      if (!cpu_profiling_enabled) {
+      if (state == SamplerRegistry::HAS_CPU_PROFILING_SAMPLERS) {
+        SamplerRegistry::IterateActiveSamplers(&DoCpuProfile, this);
+      } else {
         if (rate_limiter_.SuspendIfNecessary()) continue;
       }
-      if (cpu_profiling_enabled) {
-        if (!SamplerRegistry::IterateActiveSamplers(&DoCpuProfile, this)) {
-          return;
-        }
-      }
-      if (runtime_profiler_enabled) {
-        if (!SamplerRegistry::IterateActiveSamplers(&DoRuntimeProfile, NULL)) {
-          return;
-        }
-      }
       OS::Sleep(interval_);
     }
   }
@@ -817,11 +806,6 @@ class SamplerThread : public Thread {
     sampler_thread->SampleContext(sampler);
   }
 
-  static void DoRuntimeProfile(Sampler* sampler, void* ignored) {
-    if (!sampler->isolate()->IsInitialized()) return;
-    sampler->isolate()->runtime_profiler()->NotifyTick();
-  }
-
   void SampleContext(Sampler* sampler) {
     thread_act_t profiled_thread = sampler->platform_data()->profiled_thread();
     TickSample sample_obj;