Introduce v8::CpuProfiler::New and v8::CpuProfiler::Dispose API.

test/cctest/profiler-extension.h

Index: test/cctest/profiler-extension.h
diff --git a/test/cctest/profiler-extension.h b/test/cctest/profiler-extension.h
index 00f9a5a8085fe62c40f0f31202c69fef2efb5852..ccb6d5ed7fdf28f2ab787133c0c7789b1dc996fb 100644
--- a/test/cctest/profiler-extension.h
+++ b/test/cctest/profiler-extension.h
@@ -37,6 +37,18 @@ namespace internal {
 
 class ProfilerExtension : public v8::Extension {
  public:
+  class Scope {
+   public:
+    explicit Scope(v8::Isolate* isolate);
+    ~Scope();
+
+    static v8::CpuProfiler* profiler() { return profiler_; }
+
+   private:
+    friend class ProfilerExtension;
+    static v8::CpuProfiler* profiler_;
+  };
+
   ProfilerExtension() : v8::Extension("v8/profiler", kSource) { }
   virtual v8::Local<v8::FunctionTemplate> GetNativeFunctionTemplate(
       v8::Isolate* isolate, v8::Local<v8::String> name);