Switch ResourceBundle LoadDataResourceBytes to return RefCountedMemory.

ios/web/webui/web_ui_ios_data_source_impl.mm

 // Copyright 2014 The Chromium 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 "ios/web/webui/web_ui_ios_data_source_impl.h"
 
 #include <string>
 
 #include "base/bind.h"
 #include "base/memory/ref_counted_memory.h"
@@ skipping 136 matching lines @@
   webui::SetLoadTimeDataDefaults(web::GetWebClient()->GetApplicationLocale(),
                                  &localized_strings_);
 
   webui::AppendJsonJS(&localized_strings_, &template_data);
   callback.Run(base::RefCountedString::TakeString(&template_data));
 }
 
 void WebUIIOSDataSourceImpl::SendFromResourceBundle(
     const URLDataSourceIOS::GotDataCallback& callback,
     int idr) {
-  scoped_refptr<base::RefCountedStaticMemory> response(
+  scoped_refptr<base::RefCountedMemory> response(
       GetWebClient()->GetDataResourceBytes(idr));
   callback.Run(response);
 }
 
 }  // namespace web