Use leveldb_env::OpenDB() to open leveldb databases.

chrome/browser/sync_file_system/drive_backend/register_app_task_unittest.cc

Index: chrome/browser/sync_file_system/drive_backend/register_app_task_unittest.cc
diff --git a/chrome/browser/sync_file_system/drive_backend/register_app_task_unittest.cc b/chrome/browser/sync_file_system/drive_backend/register_app_task_unittest.cc
index c782eac0eb4147ccc60d97096b50bbd8a8789557..1748a98fe6d9a1991baba801268d5323273eb5d3 100644
--- a/chrome/browser/sync_file_system/drive_backend/register_app_task_unittest.cc
+++ b/chrome/browser/sync_file_system/drive_backend/register_app_task_unittest.cc
@@ -31,6 +31,7 @@
 #include "content/public/test/test_browser_thread_bundle.h"
 #include "google_apis/drive/drive_api_parser.h"
 #include "testing/gtest/include/gtest/gtest.h"
+#include "third_party/leveldatabase/env_chromium.h"
 #include "third_party/leveldatabase/src/helpers/memenv/memenv.h"
 #include "third_party/leveldatabase/src/include/leveldb/db.h"
 #include "third_party/leveldatabase/src/include/leveldb/env.h"
@@ -80,14 +81,14 @@ class RegisterAppTaskTest : public testing::Test {
 
  protected:
   std::unique_ptr<LevelDBWrapper> OpenLevelDB() {
-    leveldb::DB* db = nullptr;
+    std::unique_ptr<leveldb::DB> db;
     leveldb::Options options;
     options.create_if_missing = true;
     options.env = in_memory_env_.get();
-    leveldb::Status status =
-        leveldb::DB::Open(options, database_dir_.GetPath().AsUTF8Unsafe(), &db);
+    leveldb::Status status = leveldb_env::OpenDB(
+        options, database_dir_.GetPath().AsUTF8Unsafe(), &db);
     EXPECT_TRUE(status.ok());
-    return base::MakeUnique<LevelDBWrapper>(base::WrapUnique(db));
+    return base::MakeUnique<LevelDBWrapper>(std::move(db));
   }
 
   void SetUpInitialData(LevelDBWrapper* db) {