[typedarrays] sort in C++ for undefined comparefn

src/objects.h

 // Copyright 2015 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 <memory>
 
@@ skipping 10765 matching lines @@
       Isolate* isolate, Handle<JSTypedArray> o, Handle<Object> key,
       PropertyDescriptor* desc, ShouldThrow should_throw);
 
   DECLARE_CAST(JSTypedArray)
 
   ExternalArrayType type();
   V8_EXPORT_PRIVATE size_t element_size();
 
   Handle<JSArrayBuffer> GetBuffer();
 
+  static inline MaybeHandle<JSTypedArray> Validate(Isolate* isolate,
+                                                   Handle<Object> receiver,
+                                                   const char* method_name);
+
   // Dispatched behavior.
   DECLARE_PRINTER(JSTypedArray)
   DECLARE_VERIFIER(JSTypedArray)
 
   static const int kLengthOffset = kViewSize + kPointerSize;
   static const int kSize = kLengthOffset + kPointerSize;
 
   static const int kSizeWithInternalFields =
       kSize + v8::ArrayBufferView::kInternalFieldCount * kPointerSize;
 
@@ skipping 752 matching lines @@
   }
 };
 
 
 }  // NOLINT, false-positive due to second-order macros.
 }  // NOLINT, false-positive due to second-order macros.
 
 #include "src/objects/object-macros-undef.h"
 
 #endif  // V8_OBJECTS_H_