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

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

Index: chrome/browser/ui/webui/translate_internals/translate_internals_ui.cc
diff --git a/chrome/browser/ui/webui/translate_internals/translate_internals_ui.cc b/chrome/browser/ui/webui/translate_internals/translate_internals_ui.cc
index 3763105111831fabd3402e1e4d4bf4213402ea9d..35896a5522d1eada3f924b0e4ebc90c9982d5904 100644
--- a/chrome/browser/ui/webui/translate_internals/translate_internals_ui.cc
+++ b/chrome/browser/ui/webui/translate_internals/translate_internals_ui.cc
@@ -23,6 +23,11 @@
 #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
@@ -63,16 +68,20 @@ content::WebUIDataSource* CreateTranslateInternalsHTMLSource() {
   }
 
   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;
 }