Implement "streaming" $i18n{} replacer

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 171 matching lines @@
 }
 
 void WebUIDataSourceImpl::DisableDenyXFrameOptions() {
   deny_xframe_options_ = false;
 }
 
 void WebUIDataSourceImpl::DisableI18nAndUseGzipForAllPaths() {
   use_gzip_for_all_paths_ = true;
 }
 
+const ui::TemplateReplacements* WebUIDataSourceImpl::GetTemplateReplacements() const {
+  return replacements_.empty() ? nullptr : &replacements_;
+}
+
 std::string WebUIDataSourceImpl::GetSource() const {
   return source_name_;
 }
 
 std::string WebUIDataSourceImpl::GetMimeType(const std::string& path) const {
   // Remove the query string for to determine the mime type.
   std::string file_path = path.substr(0, path.find_first_of('?'));
 
   if (base::EndsWith(file_path, ".css", base::CompareCase::INSENSITIVE_ASCII))
     return "text/css";
@@ skipping 61 matching lines @@
 }
 
 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