Revert of Removes the Callee parameter from FunctionCallbackInfo.

include/v8.h

Index: include/v8.h
diff --git a/include/v8.h b/include/v8.h
index 20c9f844c0bb5c76ac1a7c71d3ea718c84744fdb..a2c35f8415cb2d3a99b440c467be54759bf80934 100644
--- a/include/v8.h
+++ b/include/v8.h
@@ -3138,6 +3138,7 @@
  public:
   V8_INLINE int Length() const;
   V8_INLINE Local<Value> operator[](int i) const;
+  V8_INLINE Local<Function> Callee() const;
   V8_INLINE Local<Object> This() const;
   V8_INLINE Local<Object> Holder() const;
   V8_INLINE bool IsConstructCall() const;
@@ -3145,7 +3146,7 @@
   V8_INLINE Isolate* GetIsolate() const;
   V8_INLINE ReturnValue<T> GetReturnValue() const;
   // This shouldn't be public, but the arm compiler needs it.
-  static const int kArgsLength = 6;
+  static const int kArgsLength = 7;
 
  protected:
   friend class internal::FunctionCallbackArguments;
@@ -3155,7 +3156,8 @@
   static const int kReturnValueDefaultValueIndex = 2;
   static const int kReturnValueIndex = 3;
   static const int kDataIndex = 4;
-  static const int kContextSaveIndex = 5;
+  static const int kCalleeIndex = 5;
+  static const int kContextSaveIndex = 6;
 
   V8_INLINE FunctionCallbackInfo(internal::Object** implicit_args,
                    internal::Object** values,
@@ -7583,6 +7585,13 @@
 
 
 template<typename T>
+Local<Function> FunctionCallbackInfo<T>::Callee() const {
+  return Local<Function>(reinterpret_cast<Function*>(
+      &implicit_args_[kCalleeIndex]));
+}
+
+
+template<typename T>
 Local<Object> FunctionCallbackInfo<T>::This() const {
   return Local<Object>(reinterpret_cast<Object*>(values_ + 1));
 }