Refactor CpuProfiler.

src/log.h

 // Copyright 2012 the V8 project authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef V8_LOG_H_
 #define V8_LOG_H_
 
 #include <string>
 
 #include "src/allocation.h"
@@ skipping 71 matching lines @@
 #define LOG_CODE_EVENT(isolate, Call)                   \
   do {                                                  \
     v8::internal::Logger* logger = (isolate)->logger(); \
     if (logger->is_logging_code_events()) logger->Call; \
   } while (false)
 
 class JitLogger;
 class PerfBasicLogger;
 class LowLevelLogger;
 class PerfJitLogger;
+class ProfilerListener;
 
 class Logger : public CodeEventListener {
  public:
   enum StartEnd { START = 0, END = 1 };
 
   // Acquires resources for logging if the right flags are set.
   bool SetUp(Isolate* isolate);
 
   // Sets the current code event handler.
   void SetCodeEventHandler(uint32_t options,
                            JitCodeEventHandler event_handler);
 
+  // Sets up ProfilerListener.
+  void SetUpProfilerListener();
+
+  // Tear down ProfilerListener if it has no observers.
+  void TearDownProfilerListener();
+
   sampler::Sampler* sampler();
 
+  ProfilerListener* profiler_listener() { return profiler_listener_.get(); }
+
   // Frees resources acquired in SetUp.
   // When a temporary file is used for the log, returns its stream descriptor,
   // leaving the file open.
   FILE* TearDown();
 
   // Emits an event with a string value -> (name, value).
   void StringEvent(const char* name, const char* value);
 
   // Emits an event with an int value -> (name, value).
   void IntEvent(const char* name, int value);
@@ skipping 209 matching lines @@
   friend class Profiler;
   template <StateTag Tag> friend class VMState;
   friend class LoggerTestHelper;
 
   bool is_logging_;
   Log* log_;
   PerfBasicLogger* perf_basic_logger_;
   PerfJitLogger* perf_jit_logger_;
   LowLevelLogger* ll_logger_;
   JitLogger* jit_logger_;
+  std::unique_ptr<ProfilerListener> profiler_listener_;
   List<CodeEventListener*> listeners_;
 
   // Guards against multiple calls to TearDown() that can happen in some tests.
   // 'true' between SetUp() and TearDown().
   bool is_initialized_;
 
   base::ElapsedTimer timer_;
 
   friend class CpuProfiler;
 };
@@ skipping 89 matching lines @@
 
   NameBuffer* name_buffer_;
 };
 
 
 }  // namespace internal
 }  // namespace v8
 
 
 #endif  // V8_LOG_H_