update_engine: Replace scoped_ptr with std::unique_ptr.

BUG=None
TEST=`FEATURES=test emerge-$BOARD update_engine`
TEST=`USE='clang asan' FEATURES=test emerge-$BOARD update_engine`

Change-Id: I55a2f7f53675faaac20ba25f72ed52cf938d7744
Reviewed-on: https://chromium-review.googlesource.com/224189
Tested-by: Ben Chan <benchan@chromium.org>
Reviewed-by: Alex Deymo <deymo@chromium.org>
Commit-Queue: Ben Chan <benchan@chromium.org>
diff --git a/omaha_request_action.h b/omaha_request_action.h
index a4d9fdf..4501a84 100644
--- a/omaha_request_action.h
+++ b/omaha_request_action.h
@@ -9,10 +9,10 @@
 #include <sys/stat.h>
 #include <sys/types.h>
 
+#include <memory>
 #include <string>
 #include <vector>
 
-#include <base/memory/scoped_ptr.h>
 #include <curl/curl.h>
 
 #include "update_engine/action.h"
@@ -265,10 +265,10 @@
   OmahaRequestParams* params_;
 
   // Pointer to the OmahaEvent info. This is an UpdateCheck request if null.
-  scoped_ptr<OmahaEvent> event_;
+  std::unique_ptr<OmahaEvent> event_;
 
   // pointer to the HttpFetcher that does the http work
-  scoped_ptr<HttpFetcher> http_fetcher_;
+  std::unique_ptr<HttpFetcher> http_fetcher_;
 
   // If true, only include the <ping> element in the request.
   bool ping_only_;