[strong] Refactor ObjectStrength into a replacement for strong boolean args

src/isolate.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 <stdlib.h>
 
 #include <fstream>  // NOLINT(readability/streams)
 #include <sstream>
 
 #include "src/v8.h"
@@ skipping 2361 matching lines @@
   return htracer();
 }
 
 
 CodeTracer* Isolate::GetCodeTracer() {
   if (code_tracer() == NULL) set_code_tracer(new CodeTracer(id()));
   return code_tracer();
 }
 
 
-Map* Isolate::get_initial_js_array_map(ElementsKind kind,
-                                       ObjectStrength strength) {
+Map* Isolate::get_initial_js_array_map(ElementsKind kind, Strength strength) {
   Context* native_context = context()->native_context();
-  Object* maybe_map_array = strength ? native_context->js_array_strong_maps()
-                                     : native_context->js_array_maps();
+  Object* maybe_map_array = is_strong(strength)
+                                ? native_context->js_array_strong_maps()
+                                : native_context->js_array_maps();
   if (!maybe_map_array->IsUndefined()) {
     Object* maybe_transitioned_map =
         FixedArray::cast(maybe_map_array)->get(kind);
     if (!maybe_transitioned_map->IsUndefined()) {
       return Map::cast(maybe_transitioned_map);
     }
   }
   return NULL;
 }
 
@@ skipping 402 matching lines @@
   // Then check whether this scope intercepts.
   if ((flag & intercept_mask_)) {
     intercepted_flags_ |= flag;
     return true;
   }
   return false;
 }
 
 }  // namespace internal
 }  // namespace v8