Expose the CLD data source in chrome://translate-internals

chrome/browser/ui/webui/translate_internals/translate_internals_ui.cc

 // Copyright 2013 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 "chrome/browser/ui/webui/translate_internals/translate_internals_ui.h"
 
 #include <string>
 #include <vector>
 
 #include "base/command_line.h"
 #include "base/memory/scoped_ptr.h"
 #include "base/values.h"
 #include "chrome/browser/browser_process.h"
 #include "chrome/browser/profiles/profile.h"
 #include "chrome/browser/ui/webui/translate_internals/translate_internals_handler.h"
 #include "chrome/common/chrome_switches.h"
 #include "chrome/common/url_constants.h"
 #include "content/public/browser/web_contents.h"
 #include "content/public/browser/web_ui.h"
 #include "content/public/browser/web_ui_data_source.h"
 #include "grit/browser_resources.h"
 #include "grit/translate_internals_resources.h"
 #include "ui/base/l10n/l10n_util.h"
 #include "ui/base/resource/resource_bundle.h"
 
+// Macro stringification.
+// https://gcc.gnu.org/onlinedocs/cpp/Stringification.html
+#define XSTR(S) STR(S)
+#define STR(S) #S
+
 namespace {
 
 // Sets the languages to |dict|. Each key is a language code and each value is
 // a language name in the locale.
 void GetLanguages(base::DictionaryValue* dict) {
   DCHECK(dict);
 
   const std::string app_locale = g_browser_process->GetApplicationLocale();
   std::vector<std::string> language_codes;
   l10n_util::GetAcceptLanguagesForLocale(app_locale, &language_codes);
@@ skipping 20 matching lines @@
   base::DictionaryValue langs;
   GetLanguages(&langs);
   for (base::DictionaryValue::Iterator it(langs); !it.IsAtEnd(); it.Advance()) {
     std::string key = "language-" + it.key();
     std::string value;
     it.value().GetAsString(&value);
     source->AddString(key, value);
   }
 
   std::string cld_version = "";
+  std::string cld_data_source = "";
   // The version strings are hardcoded here to avoid linking with the CLD
   // library, see http://crbug.com/297777.
 #if CLD_VERSION==1
   cld_version = "1.6";
+  cld_data_source = "static"; // CLD1.x does not support dynamic data loading
 #elif CLD_VERSION==2
   cld_version = "2";
+  cld_data_source = std::string(XSTR(CLD2_DATA_SOURCE));
 #else
   NOTREACHED();
 #endif
   source->AddString("cld-version", cld_version);
+  source->AddString("cld-data-source", cld_data_source);
 
   return source;
 }
 
 }  // namespace
 
 TranslateInternalsUI::TranslateInternalsUI(content::WebUI* web_ui)
     : WebUIController(web_ui) {
   web_ui->AddMessageHandler(new TranslateInternalsHandler);
 
   Profile* profile = Profile::FromWebUI(web_ui);
   content::WebUIDataSource::Add(profile, CreateTranslateInternalsHTMLSource());
 }