[chromecast] Add ResourceBundle::LoadLocalizedResourceBytes().

content/browser/webui/web_ui_data_source_impl.cc

 // Copyright (c) 2012 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 "content/browser/webui/web_ui_data_source_impl.h"
 
 #include <stddef.h>
 
 #include <string>
 
@@ skipping 234 matching lines @@
   result = path_to_idr_map_.find(file_path);
   if (result != path_to_idr_map_.end())
     resource_id = result->second;
   DCHECK_NE(resource_id, -1);
   scoped_refptr<base::RefCountedMemory> response(
       GetContentClient()->GetDataResourceBytes(resource_id));
 
   // TODO(dschuyler): improve filtering of which resource to run template
   // expansion upon. TODO(dbeam): make a streaming filter that works on gzipped
   // content.
-  if (GetMimeType(path) == "text/html" && !source()->IsGzipped(path)) {
+  if (response.get() && GetMimeType(path) == "text/html" &&
+      !source()->IsGzipped(path)) {
     std::string replaced = ui::ReplaceTemplateExpressions(
         base::StringPiece(response->front_as<char>(), response->size()),
         replacements_);
     response = base::RefCountedString::TakeString(&replaced);
   }
 
   callback.Run(response.get());
 }
 
 void WebUIDataSourceImpl::SendLocalizedStringsAsJSON(
     const URLDataSource::GotDataCallback& callback) {
   std::string template_data;
   webui::AppendJsonJS(&localized_strings_, &template_data);
   callback.Run(base::RefCountedString::TakeString(&template_data));
 }
 
 }  // namespace content