Check if timeout has expired after processing each sample

src/cpu-profiler.h

Index: src/cpu-profiler.h
diff --git a/src/cpu-profiler.h b/src/cpu-profiler.h
index e36c3016bed163e1737d0650e48b36b048c44b10..8aba5426d5a53d62fde790d30a45a1f51f463b01 100644
--- a/src/cpu-profiler.h
+++ b/src/cpu-profiler.h
@@ -161,9 +161,13 @@ class ProfilerEventsProcessor : public Thread {
  private:
   // Called from events processing thread (Run() method.)
   bool ProcessCodeEvent();
-  bool ProcessTicks();
 
-  void ProcessEventsAndDoSample();
+  enum SampleProcessingResult {
+    OneSampleProcessed,
+    FoundSampleForNextCodeEvent,
+    NoSamplesInQueue
+  };
+  SampleProcessingResult ProcessOneSample();
 
   ProfileGenerator* generator_;
   Sampler* sampler_;