Introduce LiteralsArray to hide it's implementation.

src/objects.cc

Index: src/objects.cc
diff --git a/src/objects.cc b/src/objects.cc
index 53c5fec01faaf13708a52de83fc4971bf7ad15d0..be5f1e283f4b6cfc6965bf26033e186dc015b9bd 100644
--- a/src/objects.cc
+++ b/src/objects.cc
@@ -10157,7 +10157,7 @@ void SharedFunctionInfo::AddSharedCodeToOptimizedCodeMap(
 
 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() ||
@@ -11347,7 +11347,7 @@ CodeAndLiterals SharedFunctionInfo::SearchOptimizedCodeMap(
       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() &&
@@ -12225,6 +12225,19 @@ void DeoptimizationOutputData::DeoptimizationOutputDataPrint(
 }
 
 
+// static
+Handle<LiteralsArray> LiteralsArray::Allocate(Isolate* isolate,
+                                              Handle<TypeFeedbackVector> vector,
+                                              int number_of_literals,
+                                              PretenureFlag pretenure) {
+  Handle<FixedArray> literals = isolate->factory()->NewFixedArray(
+      number_of_literals + kFirstLiteralIndex, pretenure);
+  Handle<LiteralsArray> casted_literals = Handle<LiteralsArray>::cast(literals);
+  casted_literals->set_feedback_vector(*vector);
+  return casted_literals;
+}
+
+
 void HandlerTable::HandlerTableRangePrint(std::ostream& os) {
   os << "   from   to       hdlr\n";
   for (int i = 0; i < length(); i += kRangeEntrySize) {