Make PropertyCell::UpdatedType return a handle.

src/stub-cache.cc

 // Copyright 2012 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 249 matching lines @@
   ASSERT(Code::GetKeyedAccessStoreMode(code->extra_ic_state()) == store_mode);
   return code;
 }
 
 
 Handle<Code> StubCache::ComputeStoreGlobal(Handle<Name> name,
                                            Handle<GlobalObject> receiver,
                                            Handle<PropertyCell> cell,
                                            Handle<Object> value,
                                            StrictModeFlag strict_mode) {
-  Isolate* isolate = cell->GetIsolate();
-  Handle<Type> union_type(PropertyCell::UpdatedType(cell, value), isolate);
+  Handle<Type> union_type = PropertyCell::UpdatedType(cell, value);
   bool is_constant = union_type->IsConstant();
   StoreGlobalStub stub(strict_mode, is_constant);
 
   Handle<Code> code = FindIC(
       name, Handle<JSObject>::cast(receiver),
       Code::STORE_IC, stub.GetExtraICState());
   if (!code.is_null()) return code;
 
   // Replace the placeholder cell and global object map with the actual global
   // cell and receiver map.
@@ skipping 1536 matching lines @@
           Handle<FunctionTemplateInfo>(
               FunctionTemplateInfo::cast(signature->receiver()));
     }
   }
 
   is_simple_api_call_ = true;
 }
 
 
 } }  // namespace v8::internal