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 6e2e771a41fbfa3c8e59d3066d02cbb559896a1e..f72593c190658650920290b9d7b759fd6adc2102 100644
--- a/src/cpu-profiler.h
+++ b/src/cpu-profiler.h
@@ -122,9 +122,9 @@ class TickSampleEventRecord {
 
 // This class implements both the profile events processor thread and
 // methods called by event producers: VM and stack sampler threads.
-class ProfilerEventsProcessor : public Thread {
+class ProfilerEventsProcessor : public CpuProfilerThread {
  public:
-  explicit ProfilerEventsProcessor(ProfileGenerator* generator);
+  explicit ProfilerEventsProcessor(ProfileGenerator* generator, Sampler* sampler, int interval);
   virtual ~ProfilerEventsProcessor() {}
 
   // Thread control.
@@ -171,13 +171,16 @@ class ProfilerEventsProcessor : public Thread {
   };
 
   // Called from events processing thread (Run() method.)
-  bool ProcessCodeEvent(unsigned* dequeue_order);
-  bool ProcessTicks(unsigned dequeue_order);
+  bool ProcessCodeEvent(unsigned& dequeue_order);
+  bool ProcessTicks(unsigned dequeue_order, int64_t start, int64_t time_limit);
+  void ProcessEventsQueue(unsigned& dequeue_order, int64_t start, int64_t time_limit);
 
   INLINE(static bool FilterOutCodeCreateEvent(Logger::LogEventsAndTags tag));
 
   ProfileGenerator* generator_;
   bool running_;
+  // Sampling interval in microseconds.
+  const int interval_;
   UnboundQueue<CodeEventsContainer> events_buffer_;
   SamplingCircularQueue ticks_buffer_;
   UnboundQueue<TickSampleEventRecord> ticks_from_vm_buffer_;