[WIP] A sampler thread in d8 for consuming the new API.

src/sampler-thread.h

+// Copyright 2014 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_SAMPLER_THREAD_H_
+#define V8_SAMPLER_THREAD_H_
+
+#include "include/v8-sampler.h"
+#include "src/v8.h"
+
+#include "src/base/platform/platform.h"
+
+namespace v8 {
+
+class CodeEventPrinter: public CodeEventHandler{
+ public:
+  void Create(const void* from,
+              const int size,
+              const std::string& name);
+  void Delete(const void* from);
+  void Move(const void* from, const void* to);
+  void SharedLibrary(const std::string& library_path,
+                     const void* start,
+                     const void* end);
+};
+
+class SamplerThread : public base::Thread {
+ public:
+  explicit SamplerThread(Isolate* isolate);
+  virtual ~SamplerThread() {}
+
+  void Stop();
+
+  // Thread control.
+  virtual void Run();
+
+ private:
+  Isolate* isolate_;
+  bool done_sampling_;
+};
+
+}  // namespace v8
+
+#endif  // V8_SAMPLER_THREAD_H_