[profiler] Tracing-based CPU profiler.

src/profiler/cpu-profiler.cc

Index: src/profiler/cpu-profiler.cc
diff --git a/src/profiler/cpu-profiler.cc b/src/profiler/cpu-profiler.cc
index 7a0cf9c8bfabc571b82cfad26f29f1e60138960f..c14b0ef1bdfb1c29cab3c91c794e27536d3702e0 100644
--- a/src/profiler/cpu-profiler.cc
+++ b/src/profiler/cpu-profiler.cc
@@ -326,33 +326,21 @@ void CpuProfiler::StartProcessorIfNotStarted() {
   processor_->StartSynchronously();
 }
 
-
 CpuProfile* CpuProfiler::StopProfiling(const char* title) {
   if (!is_profiling_) return nullptr;
   StopProcessorIfLastProfile(title);
-  CpuProfile* result = profiles_->StopProfiling(title);
-  if (result) {
-    result->Print();
-  }
-  return result;
+  return profiles_->StopProfiling(title);
 }
 
-
 CpuProfile* CpuProfiler::StopProfiling(String* title) {
-  if (!is_profiling_) return nullptr;
-  const char* profile_title = profiles_->GetName(title);
-  StopProcessorIfLastProfile(profile_title);
-  return profiles_->StopProfiling(profile_title);
+  return StopProfiling(profiles_->GetName(title));
 }
 
-
 void CpuProfiler::StopProcessorIfLastProfile(const char* title) {
-  if (profiles_->IsLastProfile(title)) {
-    StopProcessor();
-  }
+  if (!profiles_->IsLastProfile(title)) return;
+  StopProcessor();
 }
 
-
 void CpuProfiler::StopProcessor() {
   Logger* logger = isolate_->logger();
   is_profiling_ = false;