Implement for-in loop for proxies.

src/objects.h

 // Copyright 2011 the V8 project authors. All rights reserved.
 // Redistribution and use in source and binary forms, with or without
 // modification, are permitted provided that the following conditions are
 // met:
 //
 //     * Redistributions of source code must retain the above copyright
 //       notice, this list of conditions and the following disclaimer.
 //     * Redistributions in binary form must reproduce the above
 //       copyright notice, this list of conditions and the following
 //       disclaimer in the documentation and/or other materials provided
@@ skipping 1347 matching lines @@
   MUST_USE_RESULT MaybeObject* DeleteProperty(String* name, DeleteMode mode);
   MUST_USE_RESULT MaybeObject* DeleteElement(uint32_t index, DeleteMode mode);
 
   // Set the index'th array element.
   // Can cause GC, or return failure if GC is required.
   MUST_USE_RESULT MaybeObject* SetElement(uint32_t index,
                                           Object* value,
                                           StrictModeFlag strict_mode,
                                           bool check_prototype);
 
+  // Tests for the fast common case for property enumeration.
+  bool IsSimpleEnum();
+
   // Returns the class name ([[Class]] property in the specification).
   String* class_name();
 
   // Returns the constructor name (the name (possibly, inferred name) of the
   // function that was used to instantiate the object).
   String* constructor_name();
 
   inline PropertyAttributes GetPropertyAttribute(String* name);
   PropertyAttributes GetPropertyAttributeWithReceiver(JSReceiver* receiver,
                                                       String* name);
@@ skipping 232 matching lines @@
   void DeleteHiddenProperty(String* key);
   // Returns true if the object has a property with the hidden symbol as name.
   bool HasHiddenProperties();
 
   MUST_USE_RESULT MaybeObject* GetIdentityHash(CreationFlag flag);
   MUST_USE_RESULT MaybeObject* SetIdentityHash(Object* hash, CreationFlag flag);
 
   MUST_USE_RESULT MaybeObject* DeleteProperty(String* name, DeleteMode mode);
   MUST_USE_RESULT MaybeObject* DeleteElement(uint32_t index, DeleteMode mode);
 
-  // Tests for the fast common case for property enumeration.
-  bool IsSimpleEnum();
-
   inline void ValidateSmiOnlyElements();
 
   // Makes sure that this object can contain non-smi Object as elements.
   inline MaybeObject* EnsureCanContainNonSmiElements();
 
   // Makes sure that this object can contain the specified elements.
   inline MaybeObject* EnsureCanContainElements(Object** elements,
                                                uint32_t count);
   inline MaybeObject* EnsureCanContainElements(FixedArray* elements);
   MaybeObject* EnsureCanContainElements(Arguments* arguments,
@@ skipping 6077 matching lines @@
     } else {
       value &= ~(1 << bit_position);
     }
     return value;
   }
 };
 
 } }  // namespace v8::internal
 
 #endif  // V8_OBJECTS_H_