Add a few tests to ProfilerEventsProcessor.

src/cpu-profiler.h

Index: src/cpu-profiler.h
diff --git a/src/cpu-profiler.h b/src/cpu-profiler.h
index 7c838fd2513b42df3bd9e291dacac019ae063dc0..5e87e0d602db7c4a9a31467040cf62126eb5548d 100644
--- a/src/cpu-profiler.h
+++ b/src/cpu-profiler.h
@@ -128,6 +128,7 @@ class ProfilerEventsProcessor : public Thread {
   // Thread control.
   virtual void Run();
   inline void Stop() { running_ = false; }
+  INLINE(bool running()) { return running_; }
 
   // Events adding methods. Called by VM threads.
   void CodeCreateEvent(Logger::LogEventsAndTags tag,