Use std::default_delete as the default deleter for scoped_ptr.

components/proximity_auth/screenlock_bridge.h

Index: components/proximity_auth/screenlock_bridge.h
diff --git a/components/proximity_auth/screenlock_bridge.h b/components/proximity_auth/screenlock_bridge.h
index 9b4739298c9ad066d3b997af13784ddeab941b6b..21a32dd7346631a4eaca29547877e1a8384288b2 100644
--- a/components/proximity_auth/screenlock_bridge.h
+++ b/components/proximity_auth/screenlock_bridge.h
@@ -5,6 +5,7 @@
 #ifndef COMPONENTS_PROXIMITY_AUTH_SCREENLOCK_BRIDGE_H_
 #define COMPONENTS_PROXIMITY_AUTH_SCREENLOCK_BRIDGE_H_
 
+#include <memory>
 #include <string>
 
 #include "base/basictypes.h"
@@ -172,7 +173,7 @@ class ScreenlockBridge {
 
  private:
   friend struct base::DefaultLazyInstanceTraits<ScreenlockBridge>;
-  friend struct base::DefaultDeleter<ScreenlockBridge>;
+  friend std::default_delete<ScreenlockBridge>;
 
   ScreenlockBridge();
   ~ScreenlockBridge();