Introduce LiteralsArray to hide it's implementation.

src/objects.cc

 // Copyright 2013 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/objects.h"
 
 #include <cmath>
 #include <iomanip>
 #include <sstream>
 
@@ skipping 10139 matching lines @@
   DCHECK(code->kind() == Code::OPTIMIZED_FUNCTION);
   Handle<Object> value(shared->optimized_code_map(), isolate);
   if (value->IsSmi()) return;  // Empty code maps are unsupported.
   Handle<FixedArray> code_map = Handle<FixedArray>::cast(value);
   code_map->set(kSharedCodeIndex, *code);
 }
 
 
 void SharedFunctionInfo::AddToOptimizedCodeMap(
     Handle<SharedFunctionInfo> shared, Handle<Context> native_context,
-    Handle<HeapObject> code, Handle<FixedArray> literals,
+    Handle<HeapObject> code, Handle<LiteralsArray> literals,
     BailoutId osr_ast_id) {
   Isolate* isolate = shared->GetIsolate();
   DCHECK(*code == isolate->heap()->undefined_value() ||
          !shared->SearchOptimizedCodeMap(*native_context, osr_ast_id).code);
   DCHECK(*code == isolate->heap()->undefined_value() ||
          Code::cast(*code)->kind() == Code::OPTIMIZED_FUNCTION);
   DCHECK(native_context->IsNativeContext());
   STATIC_ASSERT(kEntryLength == 4);
   Handle<FixedArray> new_code_map;
   Handle<Object> value(shared->optimized_code_map(), isolate);
@@ skipping 1169 matching lines @@
   int entry = SearchOptimizedCodeMapEntry(native_context, osr_ast_id);
   if (entry != kNotFound) {
     FixedArray* code_map = FixedArray::cast(optimized_code_map());
     if (entry == kSharedCodeIndex) {
       result = {Code::cast(code_map->get(kSharedCodeIndex)), nullptr};
 
     } else {
       DCHECK_LE(entry + kEntryLength, code_map->length());
       Object* code = code_map->get(entry + kCachedCodeOffset);
       result = {code->IsUndefined() ? nullptr : Code::cast(code),
-                FixedArray::cast(code_map->get(entry + kLiteralsOffset))};
+                LiteralsArray::cast(code_map->get(entry + kLiteralsOffset))};
     }
   }
   if (FLAG_trace_opt && !optimized_code_map()->IsSmi() &&
       result.code == nullptr) {
     PrintF("[didn't find optimized code in optimized code map for ");
     ShortPrint();
     PrintF("]\n");
   }
   return result;
 }
@@ skipping 5394 matching lines @@
   if (cell->value() != *new_value) {
     cell->set_value(*new_value);
     Isolate* isolate = cell->GetIsolate();
     cell->dependent_code()->DeoptimizeDependentCodeGroup(
         isolate, DependentCode::kPropertyCellChangedGroup);
   }
 }
 
 }  // namespace internal
 }  // namespace v8