Remove stl_util use from domain_reliability.

components/domain_reliability/context.h

Index: components/domain_reliability/context.h
diff --git a/components/domain_reliability/context.h b/components/domain_reliability/context.h
index a598897a5e11fe03c0489054f86962057d1b3b97..34ef4bf9d2bdf6806773b0ee3bedc04dba7e823f 100644
--- a/components/domain_reliability/context.h
+++ b/components/domain_reliability/context.h
@@ -83,9 +83,6 @@ class DOMAIN_RELIABILITY_EXPORT DomainReliabilityContext {
   static const size_t kMaxQueuedBeacons;
 
  private:
-  // Deque of beacons owned by this context. (Deleted after uploading.)
-  typedef std::deque<DomainReliabilityBeacon*> BeaconDeque;
-
   void ScheduleUpload(base::TimeDelta min_delay, base::TimeDelta max_delay);
   void StartUpload();
   void OnUploadComplete(const DomainReliabilityUploader::UploadResult& result);
@@ -117,7 +114,7 @@ class DOMAIN_RELIABILITY_EXPORT DomainReliabilityContext {
   DomainReliabilityDispatcher* dispatcher_;
   DomainReliabilityUploader* uploader_;
 
-  BeaconDeque beacons_;
+  std::deque<std::unique_ptr<DomainReliabilityBeacon>> beacons_;
   size_t uploading_beacons_size_;
   base::TimeTicks upload_time_;
   base::TimeTicks last_upload_time_;