Mark deprecated APIs with relatively little use as deprecated

src/extensions/free-buffer-extension.h

Index: src/extensions/free-buffer-extension.h
diff --git a/src/extensions/free-buffer-extension.h b/src/extensions/free-buffer-extension.h
index 29ffbc014ecd8c073adb783cfe8d1888e88ab921..22d466f61e02b4e8367dfc9d06f00095aa5efe02 100644
--- a/src/extensions/free-buffer-extension.h
+++ b/src/extensions/free-buffer-extension.h
@@ -37,7 +37,8 @@ class FreeBufferExtension : public v8::Extension {
  public:
   explicit FreeBufferExtension(const char* source)
       : v8::Extension("v8/free-buffer", source) {}
-  virtual v8::Handle<v8::FunctionTemplate> GetNativeFunction(
+  virtual v8::Handle<v8::FunctionTemplate> GetNativeFunctionTemplate(
+      v8::Isolate* isolate,
       v8::Handle<v8::String> name);
   static void FreeBuffer(const v8::FunctionCallbackInfo<v8::Value>& args);
   static void Register();