Remove the global Strength enum class completely.

src/elements.cc

 // 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.
 
 #include "src/elements.h"
 
 #include "src/arguments.h"
 #include "src/conversions.h"
 #include "src/factory.h"
 #include "src/messages.h"
@@ skipping 2645 matching lines @@
   }
 
   // If a double array is concatted into a fast elements array, the fast
   // elements array needs to be initialized to contain proper holes, since
   // boxing doubles may cause incremental marking.
   ArrayStorageAllocationMode mode =
       has_double && IsFastObjectElementsKind(elements_kind)
           ? INITIALIZE_ARRAY_ELEMENTS_WITH_HOLE
           : DONT_INITIALIZE_ARRAY_ELEMENTS;
   Handle<JSArray> result_array = isolate->factory()->NewJSArray(
-      elements_kind, result_len, result_len, Strength::WEAK, mode);
+      elements_kind, result_len, result_len, mode);
   if (result_len == 0) return result_array;
   int j = 0;
   Handle<FixedArrayBase> storage(result_array->elements(), isolate);
   ElementsAccessor* accessor = ElementsAccessor::ForKind(elements_kind);
   for (uint32_t i = 0; i < concat_size; i++) {
     // It is crucial to keep |array| in a raw pointer form to avoid
     // performance degradation.
     JSArray* array = JSArray::cast((*args)[i]);
     int len = Smi::cast(array->length())->value();
     if (len > 0) {
       ElementsKind from_kind = array->GetElementsKind();
       accessor->CopyElements(array, 0, from_kind, storage, j, len);
       j += len;
     }
   }
 
   DCHECK(j == result_len);
   return result_array;
 }
 
 ElementsAccessor** ElementsAccessor::elements_accessors_ = NULL;
 }  // namespace internal
 }  // namespace v8