Revert of Refactor CpuProfiler.

src/log.cc

Index: src/log.cc
diff --git a/src/log.cc b/src/log.cc
index 8e41726036b3c65d87550463173163ec9cda592a..040109535b247f2cf660b7f3e5646fef23afed89 100644
--- a/src/log.cc
+++ b/src/log.cc
@@ -22,7 +22,6 @@
 #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"
@@ -1790,8 +1789,6 @@
     profiler_->Engage();
   }
 
-  profiler_listener_.reset();
-
   if (is_logging_) {
     addCodeEventListener(this);
   }
@@ -1819,18 +1816,6 @@
   }
 }
 
-void Logger::SetUpProfilerListener() {
-  if (!is_initialized_) return;
-  if (profiler_listener_.get() == nullptr) {
-    profiler_listener_.reset(new ProfilerListener(isolate_));
-  }
-  addCodeEventListener(profiler_listener_.get());
-}
-
-void Logger::TearDownProfilerListener() {
-  if (profiler_listener_->HasObservers()) return;
-  removeCodeEventListener(profiler_listener_.get());
-}
 
 sampler::Sampler* Logger::sampler() {
   return ticker_;
@@ -1875,10 +1860,6 @@
     jit_logger_ = NULL;
   }
 
-  if (profiler_listener_.get() != nullptr) {
-    removeCodeEventListener(profiler_listener_.get());
-  }
-
   return log_->Close();
 }