Moving cpu profiling into its own thread.

src/cpu-profiler.h

Index: src/cpu-profiler.h
diff --git a/src/cpu-profiler.h b/src/cpu-profiler.h
index 9cd44842095ccabe25d0ef74f0c0f0b53dde958d..d335dedc5cb765f2f2a66eb1e451207c44d749f3 100644
--- a/src/cpu-profiler.h
+++ b/src/cpu-profiler.h
@@ -124,7 +124,9 @@ class TickSampleEventRecord {
 // methods called by event producers: VM and stack sampler threads.
 class ProfilerEventsProcessor : public Thread {
  public:
-  explicit ProfilerEventsProcessor(ProfileGenerator* generator);
+  explicit ProfilerEventsProcessor(ProfileGenerator* generator,
+                                   Sampler* sampler,
+                                   int period_in_useconds);
   virtual ~ProfilerEventsProcessor() {}
 
   // Thread control.
@@ -172,12 +174,16 @@ class ProfilerEventsProcessor : public Thread {
 
   // Called from events processing thread (Run() method.)
   bool ProcessCodeEvent(unsigned* dequeue_order);
-  bool ProcessTicks(unsigned dequeue_order);
+  bool ProcessTicks(int64_t stop_time, unsigned dequeue_order);
+  void ProcessEventsQueue(int64_t stop_time, unsigned* dequeue_order);
 
   INLINE(static bool FilterOutCodeCreateEvent(Logger::LogEventsAndTags tag));
 
   ProfileGenerator* generator_;
+  Sampler* sampler_;
   bool running_;
+  // Sampling period in microseconds.
+  const int period_in_useconds_;
   UnboundQueue<CodeEventsContainer> events_buffer_;
   SamplingCircularQueue ticks_buffer_;
   UnboundQueue<TickSampleEventRecord> ticks_from_vm_buffer_;