[turbofan] Port initialization of new.target variable.

src/frames.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_FRAMES_H_
 #define V8_FRAMES_H_
 
 #include "src/allocation.h"
 #include "src/handles.h"
 #include "src/safepoint-table.h"
@@ skipping 515 matching lines @@
   // Generator support to preserve operand stack.
   void SaveOperandStack(FixedArray* store) const;
   void RestoreOperandStack(FixedArray* store);
 
   // Debugger access.
   void SetParameterValue(int index, Object* value) const;
 
   // Check if this frame is a constructor frame invoked through 'new'.
   bool IsConstructor() const;
 
+  // Returns the original constructor function that was used in the constructor
+  // call to this frame. Note that this is only valid on constructor frames.
+  Object* GetOriginalConstructor() const;
+
   // Check if this frame has "adapted" arguments in the sense that the
   // actual passed arguments are available in an arguments adaptor
   // frame below it on the stack.
   inline bool has_adapted_arguments() const;
   int GetArgumentsLength() const;
 
   // Garbage collection support.
   virtual void Iterate(ObjectVisitor* v) const;
 
   // Printing support.
@@ skipping 346 matching lines @@
 };
 
 
 // Reads all frames on the current stack and copies them into the current
 // zone memory.
 Vector<StackFrame*> CreateStackMap(Isolate* isolate, Zone* zone);
 
 } }  // namespace v8::internal
 
 #endif  // V8_FRAMES_H_