[Remote suggestions] Remove the unique_ptr wrapper around callbacks

components/ntp_snippets/remote/remote_suggestions_scheduler_impl.cc

 // Copyright 2016 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "components/ntp_snippets/remote/remote_suggestions_scheduler_impl.h"
 
 #include <random>
 #include <string>
 #include <utility>
 
@@ skipping 424 matching lines @@
 void RemoteSuggestionsSchedulerImpl::RefetchInTheBackground() {
   if (background_fetch_in_progress_) {
     return;
   }
 
   if (!AcquireQuota(/*interactive_request=*/false)) {
     return;
   }
 
   background_fetch_in_progress_ = true;
-  provider_->RefetchInTheBackground(
-      base::MakeUnique<RemoteSuggestionsProvider::FetchStatusCallback>(
-          base::Bind(
-              &RemoteSuggestionsSchedulerImpl::RefetchInTheBackgroundFinished,
-              base::Unretained(this))));
+  provider_->RefetchInTheBackground(base::Bind(
+      &RemoteSuggestionsSchedulerImpl::RefetchInTheBackgroundFinished,
+      base::Unretained(this)));
 }
 
 bool RemoteSuggestionsSchedulerImpl::ShouldRefetchInTheBackgroundNow(
     TriggerType trigger) {
   const base::Time last_fetch_attempt_time = base::Time::FromInternalValue(
       profile_prefs_->GetInt64(prefs::kSnippetLastFetchAttempt));
   base::Time first_allowed_fetch_time;
   switch (trigger) {
     case TriggerType::NTP_OPENED:
       first_allowed_fetch_time =
@@ skipping 115 matching lines @@
   return enabled_types;
 }
 
 std::set<RemoteSuggestionsSchedulerImpl::TriggerType>
 RemoteSuggestionsSchedulerImpl::GetDefaultEnabledTriggerTypes() {
   return {TriggerType::PERSISTENT_SCHEDULER_WAKE_UP, TriggerType::NTP_OPENED,
           TriggerType::BROWSER_FOREGROUNDED};
 }
 
 }  // namespace ntp_snippets