Revert "Perform CPU sampling by CPU sampling thread only iff processing thread is not running."

src/platform-macos.cc

Index: src/platform-macos.cc
diff --git a/src/platform-macos.cc b/src/platform-macos.cc
index 01dcb1d0d5971d4d5fc69320a263517809ce5598..22d2bcfe76b1dca86b68df1758aaa973022b563d 100644
--- a/src/platform-macos.cc
+++ b/src/platform-macos.cc
@@ -825,7 +825,7 @@ class SamplerThread : public Thread {
   void SampleContext(Sampler* sampler) {
     thread_act_t profiled_thread = sampler->platform_data()->profiled_thread();
     TickSample sample_obj;
-    TickSample* sample = CpuProfiler::StartTickSampleEvent(sampler->isolate());
+    TickSample* sample = CpuProfiler::TickSampleEvent(sampler->isolate());
     if (sample == NULL) sample = &sample_obj;
 
     if (KERN_SUCCESS != thread_suspend(profiled_thread)) return;
@@ -863,7 +863,6 @@ class SamplerThread : public Thread {
       sampler->SampleStack(sample);
       sampler->Tick(sample);
     }
-    CpuProfiler::FinishTickSampleEvent(sampler->isolate());
     thread_resume(profiled_thread);
   }
 
@@ -916,11 +915,6 @@ Sampler::~Sampler() {
 }
 
 
-void Sampler::DoSample() {
-  // TODO(rogulenko): implement
-}
-
-
 void Sampler::Start() {
   ASSERT(!IsActive());
   SetActive(true);
@@ -935,12 +929,4 @@ void Sampler::Stop() {
 }
 
 
-void Sampler::StartSampling() {
-}
-
-
-void Sampler::StopSampling() {
-}
-
-
 } }  // namespace v8::internal