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

components/browser_sync/profile_sync_service_bookmark_unittest.cc

Index: components/browser_sync/profile_sync_service_bookmark_unittest.cc
diff --git a/components/browser_sync/profile_sync_service_bookmark_unittest.cc b/components/browser_sync/profile_sync_service_bookmark_unittest.cc
index 56ed06803fecdd1d4fc21b3b00e1520d0d8c268f..42a709c59dc4bf2dba5eb7ca8b7070daf180bcb0 100644
--- a/components/browser_sync/profile_sync_service_bookmark_unittest.cc
+++ b/components/browser_sync/profile_sync_service_bookmark_unittest.cc
@@ -546,10 +546,10 @@ class ProfileSyncServiceBookmarkTest : public testing::Test {
     DCHECK(!model_associator_);
 
     // Set up model associator.
-    model_associator_.reset(new BookmarkModelAssociator(
+    model_associator_ = base::MakeUnique<BookmarkModelAssociator>(
         model_.get(), sync_client_.get(), test_user_share_.user_share(),
         base::MakeUnique<syncer::DataTypeErrorHandlerMock>(),
-        kExpectMobileBookmarks));
+        kExpectMobileBookmarks);
 
     local_merge_result_ = syncer::SyncMergeResult(syncer::BOOKMARKS);
     syncer_merge_result_ = syncer::SyncMergeResult(syncer::BOOKMARKS);