[Sync] Rewriting ".reset(new" pattern to use "= base::MakeUnique" instead.

components/sync/model_impl/attachments/attachment_service_impl.cc

Index: components/sync/model_impl/attachments/attachment_service_impl.cc
diff --git a/components/sync/model_impl/attachments/attachment_service_impl.cc b/components/sync/model_impl/attachments/attachment_service_impl.cc
index 2ca480476bcae56a5b25900bcab082d403dc2d4a..695e8e41e380aa338b275e6ba66659589eabdc71 100644
--- a/components/sync/model_impl/attachments/attachment_service_impl.cc
+++ b/components/sync/model_impl/attachments/attachment_service_impl.cc
@@ -9,6 +9,7 @@
 
 #include "base/bind.h"
 #include "base/location.h"
+#include "base/memory/ptr_util.h"
 #include "base/single_thread_task_runner.h"
 #include "base/threading/thread_task_runner_handle.h"
 #include "base/time/time.h"
@@ -129,10 +130,10 @@ AttachmentServiceImpl::AttachmentServiceImpl(
   // network becomes disconnected, consider suspending queue dispatch.  When
   // connectivity is restored, consider clearing any dispatch backoff (bug
   // 411981).
-  upload_task_queue_.reset(new TaskQueue<AttachmentId>(
+  upload_task_queue_ = base::MakeUnique<TaskQueue<AttachmentId>>(
       base::Bind(&AttachmentServiceImpl::BeginUpload,
                  weak_ptr_factory_.GetWeakPtr()),
-      initial_backoff_delay, max_backoff_delay));
+      initial_backoff_delay, max_backoff_delay);
 
   net::NetworkChangeNotifier::AddNetworkChangeObserver(this);
 }