Fix translate namespace

components/translate/core/browser/translate_download_manager.cc

Index: components/translate/core/browser/translate_download_manager.cc
diff --git a/components/translate/core/browser/translate_download_manager.cc b/components/translate/core/browser/translate_download_manager.cc
index 6b33ec032024d22fa7961f90b2814e33be19f302..9daf2d5bc95ec34608f5e4f06229a9df8f2ec34a 100644
--- a/components/translate/core/browser/translate_download_manager.cc
+++ b/components/translate/core/browser/translate_download_manager.cc
@@ -11,6 +11,8 @@
 #include "components/translate/core/common/translate_pref_names.h"
 #include "components/translate/core/common/translate_switches.h"
 
+namespace translate {
+
 // static
 TranslateDownloadManager* TranslateDownloadManager::GetInstance() {
   return Singleton<TranslateDownloadManager>::get();
@@ -130,3 +132,5 @@ void TranslateDownloadManager::SetTranslateScriptExpirationDelay(int delay_ms) {
   }
   script_->set_expiration_delay(delay_ms);
 }
+
+}  // namespace translate