Specify AllowCaching = false for dynamically-generated contents

content/browser/webui/shared_resources_data_source.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/shared_resources_data_source.h"
 
 #include <stddef.h>
 
 #include "base/containers/hash_tables.h"
 #include "base/files/file_path.h"
@@ skipping 91 matching lines @@
   } else if (idr == IDR_WEBUI_CSS_TEXT_DEFAULTS_MD) {
     std::string css = webui::GetWebUiCssTextDefaultsMd();
     bytes = base::RefCountedString::TakeString(&css);
   } else {
     bytes = GetContentClient()->GetDataResourceBytes(idr);
   }
 
   callback.Run(bytes.get());
 }
 
+bool SharedResourcesDataSource::AllowCaching() const {
+  // Should not be cached to reflect dynamically-generated contents that may
+  // depend on the current locale.
+  return false;
+}
+
 std::string SharedResourcesDataSource::GetMimeType(
     const std::string& path) const {
   if (path.empty())
     return "text/html";
 
 #if defined(OS_WIN)
   base::FilePath file(base::UTF8ToWide(path));
   std::string extension = base::WideToUTF8(file.FinalExtension());
 #else
   base::FilePath file(path);
@@ skipping 52 matching lines @@
   std::string allowed_origin_prefix = kChromeUIScheme;
   allowed_origin_prefix += "://";
   if (!base::StartsWith(origin, allowed_origin_prefix,
                         base::CompareCase::SENSITIVE)) {
     return "null";
   }
   return origin;
 }
 
 }  // namespace content