Add Type::cast

src/objects.cc

 // Copyright 2013 the V8 project authors. All rights reserved.
 // Redistribution and use in source and binary forms, with or without
 // modification, are permitted provided that the following conditions are
 // met:
 //
 //     * Redistributions of source code must retain the above copyright
 //       notice, this list of conditions and the following disclaimer.
 //     * Redistributions in binary form must reproduce the above
 //       copyright notice, this list of conditions and the following
 //       disclaimer in the documentation and/or other materials provided
@@ skipping 15847 matching lines @@
 
 MaybeObject* PropertyCell::SetValueInferType(Object* value,
                                              WriteBarrierMode ignored) {
   set_value(value, ignored);
   if (!Type::Any()->Is(type())) {
     IdempotentPointerToHandleCodeTrampoline trampoline(GetIsolate());
     MaybeObject* maybe_type = trampoline.CallWithReturnValue(
         &PropertyCell::UpdateType,
         Handle<PropertyCell>(this),
         Handle<Object>(value, GetIsolate()));
-    if (maybe_type->IsFailure()) return maybe_type;
-    Type* new_type = static_cast<Type*>(maybe_type);
+    Type* new_type;
+    if (maybe_type->To(&new_type)) return maybe_type;
     set_type(new_type);
   }
   return value;
 }
 
 
 void PropertyCell::AddDependentCompilationInfo(CompilationInfo* info) {
   Handle<DependentCode> dep(dependent_code());
   Handle<DependentCode> codes =
       DependentCode::Insert(dep, DependentCode::kPropertyCellChangedGroup,
                             info->object_wrapper());
   if (*codes != dependent_code()) set_dependent_code(*codes);
   info->dependencies(DependentCode::kPropertyCellChangedGroup)->Add(
       Handle<HeapObject>(this), info->zone());
 }
 
 
 void PropertyCell::AddDependentCode(Handle<Code> code) {
   Handle<DependentCode> codes = DependentCode::Insert(
       Handle<DependentCode>(dependent_code()),
       DependentCode::kPropertyCellChangedGroup, code);
   if (*codes != dependent_code()) set_dependent_code(*codes);
 }
 
 
 } }  // namespace v8::internal