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

src/platform-cygwin.cc

Index: src/platform-cygwin.cc
diff --git a/src/platform-cygwin.cc b/src/platform-cygwin.cc
index 028aae327bbdd8a0dd390bad5d9f14977f55f1aa..24e256ac3375f16da33865139a69983f05505fdf 100644
--- a/src/platform-cygwin.cc
+++ b/src/platform-cygwin.cc
@@ -699,7 +699,7 @@ class SamplerThread : public Thread {
     memset(&context, 0, sizeof(context));
 
     TickSample sample_obj;
-    TickSample* sample = CpuProfiler::StartTickSampleEvent(sampler->isolate());
+    TickSample* sample = CpuProfiler::TickSampleEvent(sampler->isolate());
     if (sample == NULL) sample = &sample_obj;
 
     static const DWORD kSuspendFailed = static_cast<DWORD>(-1);
@@ -720,7 +720,6 @@ class SamplerThread : public Thread {
       sampler->SampleStack(sample);
       sampler->Tick(sample);
     }
-    CpuProfiler::FinishTickSampleEvent(sampler->isolate());
     ResumeThread(profiled_thread);
   }
 
@@ -775,11 +774,6 @@ Sampler::~Sampler() {
 }
 
 
-void Sampler::DoSample() {
-  // TODO(rogulenko): implement
-}
-
-
 void Sampler::Start() {
   ASSERT(!IsActive());
   SetActive(true);
@@ -794,12 +788,4 @@ void Sampler::Stop() {
 }
 
 
-void Sampler::StartSampling() {
-}
-
-
-void Sampler::StopSampling() {
-}
-
-
 } }  // namespace v8::internal