Remove the global Strength enum class completely.

src/json-parser.h

 // Copyright 2011 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_JSON_PARSER_H_
 #define V8_JSON_PARSER_H_
 
 #include "src/char-predicates.h"
 #include "src/conversions.h"
 #include "src/debug/debug.h"
@@ skipping 518 matching lines @@
     }
   }
   AdvanceSkipWhitespace();
   // Allocate a fixed array with all the elements.
   Handle<FixedArray> fast_elements =
       factory()->NewFixedArray(elements.length(), pretenure_);
   for (int i = 0, n = elements.length(); i < n; i++) {
     fast_elements->set(i, *elements[i]);
   }
   Handle<Object> json_array = factory()->NewJSArrayWithElements(
-      fast_elements, FAST_ELEMENTS, Strength::WEAK, pretenure_);
+      fast_elements, FAST_ELEMENTS, pretenure_);
   return scope.CloseAndEscape(json_array);
 }
 
 
 template <bool seq_one_byte>
 Handle<Object> JsonParser<seq_one_byte>::ParseJsonNumber() {
   bool negative = false;
   int beg_pos = position_;
   if (c0_ == '-') {
     Advance();
@@ skipping 287 matching lines @@
   DCHECK_EQ('"', c0_);
   // Advance past the last '"'.
   AdvanceSkipWhitespace();
   return result;
 }
 
 }  // namespace internal
 }  // namespace v8
 
 #endif  // V8_JSON_PARSER_H_