Unify ToArrayLength conversions

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 10058 matching lines @@
                                                  uint32_t length);
 
   // Set the content of the array to the content of storage.
   static inline void SetContent(Handle<JSArray> array,
                                 Handle<FixedArrayBase> storage);
 
   static bool DefineOwnProperty(Isolate* isolate, Handle<JSArray> o,
                                 Handle<Object> name, PropertyDescriptor* desc,
                                 ShouldThrow should_throw);
 
+  static bool AnythingToArrayLength(Isolate* isolate,
+                                    Handle<Object> length_object,
+                                    uint32_t* output);
   static bool ArraySetLength(Isolate* isolate, Handle<JSArray> a,
                              PropertyDescriptor* desc,
                              ShouldThrow should_throw);
 
   DECLARE_CAST(JSArray)
 
   // Dispatched behavior.
   DECLARE_PRINTER(JSArray)
   DECLARE_VERIFIER(JSArray)
 
@@ skipping 640 matching lines @@
   Handle<FixedArray> keys_;
   Handle<OrderedHashSet> set_;
   int length_;
   DISALLOW_COPY_AND_ASSIGN(KeyAccumulator);
 };
 
 }  // NOLINT, false-positive due to second-order macros.
 }  // NOLINT, false-positive due to second-order macros.
 
 #endif  // V8_OBJECTS_H_