Convert //extensions/renderer from scoped_ptr to std::unique_ptr

extensions/renderer/api/display_source/display_source_session.cc

Index: extensions/renderer/api/display_source/display_source_session.cc
diff --git a/extensions/renderer/api/display_source/display_source_session.cc b/extensions/renderer/api/display_source/display_source_session.cc
index 96e5bd55482e85822b30e1142005340a6c7a177b..8759977dabfccd9e667d8177a11eb13fc38a6755 100644
--- a/extensions/renderer/api/display_source/display_source_session.cc
+++ b/extensions/renderer/api/display_source/display_source_session.cc
@@ -35,10 +35,11 @@ void DisplaySourceSession::SetNotificationCallbacks(
   error_callback_ = error_callback;
 }
 
-scoped_ptr<DisplaySourceSession> DisplaySourceSessionFactory::CreateSession(
+std::unique_ptr<DisplaySourceSession>
+DisplaySourceSessionFactory::CreateSession(
     const DisplaySourceSessionParams& params) {
 #if defined(ENABLE_WIFI_DISPLAY)
-  return scoped_ptr<DisplaySourceSession>(new WiFiDisplaySession(params));
+  return std::unique_ptr<DisplaySourceSession>(new WiFiDisplaySession(params));
 #endif
   return nullptr;
 }