Remove obsolete Factory::EnsureCanContainElements method.

src/factory.h

 // Copyright 2012 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 310 matching lines @@
       Handle<FixedArrayBase> elements,
       ElementsKind elements_kind = TERMINAL_FAST_ELEMENTS_KIND,
       PretenureFlag pretenure = NOT_TENURED);
 
   void SetElementsCapacityAndLength(Handle<JSArray> array,
                                     int capacity,
                                     int length);
 
   void SetContent(Handle<JSArray> array, Handle<FixedArrayBase> elements);
 
-  void EnsureCanContainElements(Handle<JSArray> array,
-                                Handle<FixedArrayBase> elements,
-                                uint32_t length,
-                                EnsureElementsMode mode);
-
   Handle<JSArrayBuffer> NewJSArrayBuffer();
 
   Handle<JSTypedArray> NewJSTypedArray(ExternalArrayType type);
 
   Handle<JSDataView> NewJSDataView();
 
   Handle<JSProxy> NewJSProxy(Handle<Object> handler, Handle<Object> prototype);
 
   // Change the type of the argument into a JS object/function and reinitialize.
   void BecomeJSObject(Handle<JSReceiver> object);
@@ skipping 320 matching lines @@
   }
 
  private:
   Isolate* isolate_;
 };
 
 
 } }  // namespace v8::internal
 
 #endif  // V8_FACTORY_H_