1 files changed, 5 insertions, 2 deletions
diff --git a/chrome/browser/chromeos/upgrade_detector_chromeos.h b/chrome/browser/chromeos/upgrade_detector_chromeos.h
index 0bca5ea..467c15b 100644
--- a/chrome/browser/chromeos/upgrade_detector_chromeos.h
+++ b/chrome/browser/chromeos/upgrade_detector_chromeos.h
@@ -11,7 +11,10 @@
 #include "chrome/browser/upgrade_detector.h"
 #include "chromeos/dbus/update_engine_client.h"
 
-template <typename T> struct DefaultSingletonTraits;
+namespace base {
+template <typename T>
+struct DefaultSingletonTraits;
+}  // namespace base
 
 class UpgradeDetectorChromeos : public UpgradeDetector,
                                 public chromeos::UpdateEngineClient::Observer {
@@ -29,7 +32,7 @@ class UpgradeDetectorChromeos : public UpgradeDetector,
   void Shutdown();
 
  private:
-  friend struct DefaultSingletonTraits<UpgradeDetectorChromeos>;
+  friend struct base::DefaultSingletonTraits<UpgradeDetectorChromeos>;
   class ChannelsRequester;
 
   UpgradeDetectorChromeos();