Add CollectSample API function to CpuProfiler

src/profiler/sampler.cc

Index: src/profiler/sampler.cc
diff --git a/src/profiler/sampler.cc b/src/profiler/sampler.cc
index dc4c4c4f06d49e4c4758121ad9449b3c2076153d..1add4e71fdab35f33593dcf90e4fda1bd12f935e 100644
--- a/src/profiler/sampler.cc
+++ b/src/profiler/sampler.cc
@@ -657,10 +657,12 @@ SamplerThread* SamplerThread::instance_ = NULL;
 //
 DISABLE_ASAN void TickSample::Init(Isolate* isolate,
                                    const v8::RegisterState& regs,
-                                   RecordCEntryFrame record_c_entry_frame) {
+                                   RecordCEntryFrame record_c_entry_frame,
+                                   bool update_stats) {
   timestamp = base::TimeTicks::HighResolutionNow();
   pc = reinterpret_cast<Address>(regs.pc);
   state = isolate->current_vm_state();
+  this->update_stats = update_stats;
 
   // Avoid collecting traces while doing GC.
   if (state == GC) return;
@@ -796,7 +798,7 @@ void Sampler::SampleStack(const v8::RegisterState& state) {
   TickSample* sample = isolate_->cpu_profiler()->StartTickSample();
   TickSample sample_obj;
   if (sample == NULL) sample = &sample_obj;
-  sample->Init(isolate_, state, TickSample::kIncludeCEntryFrame);
+  sample->Init(isolate_, state, TickSample::kIncludeCEntryFrame, true);
   if (is_counting_samples_) {
     if (sample->state == JS || sample->state == EXTERNAL) {
       ++js_and_external_sample_count_;