Remove the global Strength enum class completely.

src/isolate.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_ISOLATE_H_
 #define V8_ISOLATE_H_
 
 #include <queue>
 #include <set>
 
@@ skipping 935 matching lines @@
     return date_cache_;
   }
 
   void set_date_cache(DateCache* date_cache) {
     if (date_cache != date_cache_) {
       delete date_cache_;
     }
     date_cache_ = date_cache;
   }
 
-  Map* get_initial_js_array_map(ElementsKind kind,
-                                Strength strength = Strength::WEAK);
+  Map* get_initial_js_array_map(ElementsKind kind);
 
   static const int kArrayProtectorValid = 1;
   static const int kArrayProtectorInvalid = 0;
 
   bool IsFastArrayConstructorPrototypeChainIntact();
   bool IsArraySpeciesLookupChainIntact();
 
   // On intent to set an element in object, make sure that appropriate
   // notifications occur if the set is on the elements of the array or
   // object prototype. Also ensure that changes to prototype chain between
@@ skipping 607 matching lines @@
 
   EmbeddedVector<char, 128> filename_;
   FILE* file_;
   int scope_depth_;
 };
 
 }  // namespace internal
 }  // namespace v8
 
 #endif  // V8_ISOLATE_H_