cleanup check for compatible receiver of api callback

src/objects.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_OBJECTS_H_
 #define V8_OBJECTS_H_
 
 #include <iosfwd>
 
 #include "src/allocation.h"
@@ skipping 10621 matching lines @@
   static const int kAccessCheckInfoOffset =
       kInstanceCallHandlerOffset + kPointerSize;
   static const int kFlagOffset = kAccessCheckInfoOffset + kPointerSize;
   static const int kLengthOffset = kFlagOffset + kPointerSize;
   static const int kSize = kLengthOffset + kPointerSize;
 
   // Returns true if |object| is an instance of this function template.
   bool IsTemplateFor(Object* object);
   bool IsTemplateFor(Map* map);
 
+  // Returns the holder JSObject if the function can legally be called with this
+  // receiver.  Returns Heap::null_value() if the call is illegal.
+  Object* GetCompatibleReceiver(Isolate* isolate, Object* receiver);
+
  private:
   // Bit position in the flag, from least significant bit position.
   static const int kHiddenPrototypeBit   = 0;
   static const int kUndetectableBit      = 1;
   static const int kNeedsAccessCheckBit  = 2;
   static const int kReadOnlyPrototypeBit = 3;
   static const int kRemovePrototypeBit   = 4;
   static const int kDoNotCacheBit        = 5;
 
   DISALLOW_IMPLICIT_CONSTRUCTORS(FunctionTemplateInfo);
@@ skipping 270 matching lines @@
     } else {
       value &= ~(1 << bit_position);
     }
     return value;
   }
 };
 
 } }  // namespace v8::internal
 
 #endif  // V8_OBJECTS_H_