Refactor CpuProfiler.

src/log.cc

Index: src/log.cc
diff --git a/src/log.cc b/src/log.cc
index 040109535b247f2cf660b7f3e5646fef23afed89..2089917fc80abc1f3fda6cec61d1259cc15a23b7 100644
--- a/src/log.cc
+++ b/src/log.cc
@@ -22,6 +22,7 @@
 #include "src/macro-assembler.h"
 #include "src/perf-jit.h"
 #include "src/profiler/cpu-profiler-inl.h"
+#include "src/profiler/profiler-listener.h"
 #include "src/runtime-profiler.h"
 #include "src/string-stream.h"
 #include "src/vm-state-inl.h"
@@ -754,6 +755,7 @@ Logger::Logger(Isolate* isolate)
       perf_jit_logger_(NULL),
       ll_logger_(NULL),
       jit_logger_(NULL),
+      profiler_listener_(NULL),
       listeners_(5),
       is_initialized_(false) {}
 
@@ -1816,6 +1818,11 @@ void Logger::SetCodeEventHandler(uint32_t options,
   }
 }
 
+void Logger::SetUpProfilerListener() {
+  if (profiler_listener_ || !is_initialized_) return;
+  profiler_listener_ = new ProfilerListener(isolate_);
+  addCodeEventListener(profiler_listener_);
+}
 
 sampler::Sampler* Logger::sampler() {
   return ticker_;
@@ -1860,6 +1867,12 @@ FILE* Logger::TearDown() {
     jit_logger_ = NULL;
   }
 
+  if (profiler_listener_) {
+    removeCodeEventListener(profiler_listener_);
+    delete profiler_listener_;
+    profiler_listener_ = NULL;
+  }
+
   return log_->Close();
 }