Fix issue 833: eliminate race condition in ProfilerEventsProcessor.

src/cpu-profiler.cc

Index: src/cpu-profiler.cc
diff --git a/src/cpu-profiler.cc b/src/cpu-profiler.cc
index 3e554ccebdc9faa9190313feb7374e78312ffb1f..c0ed9297a2dd966a5daf9a5b7046e2ac2601c04a 100644
--- a/src/cpu-profiler.cc
+++ b/src/cpu-profiler.cc
@@ -46,7 +46,7 @@ static const int kTickSamplesBufferChunksCount = 16;
 
 ProfilerEventsProcessor::ProfilerEventsProcessor(ProfileGenerator* generator)
     : generator_(generator),
-      running_(false),
+      running_(true),
       ticks_buffer_(sizeof(TickSampleEventRecord),
                     kTickSamplesBufferChunkSize,
                     kTickSamplesBufferChunksCount),
@@ -247,7 +247,6 @@ bool ProfilerEventsProcessor::ProcessTicks(unsigned dequeue_order) {
 
 void ProfilerEventsProcessor::Run() {
   unsigned dequeue_order = 0;
-  running_ = true;
 
   while (running_) {
     // Process ticks until we have any.