Convert //chrome/browser/chromeos from scoped_ptr to std::unique_ptr

chrome/browser/chromeos/login/screens/user_image_screen.h

Index: chrome/browser/chromeos/login/screens/user_image_screen.h
diff --git a/chrome/browser/chromeos/login/screens/user_image_screen.h b/chrome/browser/chromeos/login/screens/user_image_screen.h
index 221e715ae9c2b7256bcc2a05276d85f4940a42e4..338d3739d0efcf00a3adbd81d4642fcf4ff41afa 100644
--- a/chrome/browser/chromeos/login/screens/user_image_screen.h
+++ b/chrome/browser/chromeos/login/screens/user_image_screen.h
@@ -5,9 +5,10 @@
 #ifndef CHROME_BROWSER_CHROMEOS_LOGIN_SCREENS_USER_IMAGE_SCREEN_H_
 #define CHROME_BROWSER_CHROMEOS_LOGIN_SCREENS_USER_IMAGE_SCREEN_H_
 
+#include <memory>
+
 #include "base/compiler_specific.h"
 #include "base/macros.h"
-#include "base/memory/scoped_ptr.h"
 #include "base/time/time.h"
 #include "chrome/browser/chromeos/camera_presence_notifier.h"
 #include "chrome/browser/chromeos/login/screens/base_screen.h"
@@ -117,7 +118,7 @@ class UserImageScreen : public UserImageModel,
 
   content::NotificationRegistrar notification_registrar_;
 
-  scoped_ptr<policy::PolicyChangeRegistrar> policy_registrar_;
+  std::unique_ptr<policy::PolicyChangeRegistrar> policy_registrar_;
 
   UserImageView* view_;
 
@@ -133,7 +134,7 @@ class UserImageScreen : public UserImageModel,
   int selected_image_;
 
   // Timer used for waiting for user image sync.
-  scoped_ptr<base::Timer> sync_timer_;
+  std::unique_ptr<base::Timer> sync_timer_;
 
   // If screen ready to be shown.
   bool is_screen_ready_;