[FileAPI] Replace default leveldb::Env with leveldb::MemEnv in tests.

chrome/browser/sync_file_system/drive_backend/drive_backend_sync_unittest.cc

 // Copyright 2014 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 <algorithm>
 #include <stack>
 
 #include "base/file_util.h"
 #include "base/message_loop/message_loop.h"
 #include "base/run_loop.h"
@@ skipping 35 matching lines @@
   virtual void SetUp() OVERRIDE {
     ASSERT_TRUE(base_dir_.CreateUniqueTempDir());
     in_memory_env_.reset(leveldb::NewMemEnv(leveldb::Env::Default()));
 
     io_task_runner_ = content::BrowserThread::GetMessageLoopProxyForThread(
         content::BrowserThread::IO);
     file_task_runner_ = content::BrowserThread::GetMessageLoopProxyForThread(
         content::BrowserThread::FILE);
 
     RegisterSyncableFileSystem();
-    local_sync_service_.reset(new LocalFileSyncService(&profile_));
+    local_sync_service_ = LocalFileSyncService::CreateForTesting(
+        &profile_, in_memory_env_.get());
 
     scoped_ptr<drive::FakeDriveService> drive_service(
         new drive::FakeDriveService());
     drive_service->Initialize("test@example.com");
     ASSERT_TRUE(drive_service->LoadAccountMetadataForWapi(
         "sync_file_system/account_metadata.json"));
     ASSERT_TRUE(drive_service->LoadResourceListForWapi(
         "gdata/root_feed.json"));
 
     scoped_ptr<drive::DriveUploaderInterface> uploader(
@@ skipping 69 matching lines @@
         path != result_path)
       return false;
     *file_id = tracker.file_id();
     return true;
   }
 
   SyncStatusCode RegisterApp(const std::string& app_id) {
     GURL origin = extensions::Extension::GetBaseURLFromExtensionId(app_id);
     if (!ContainsKey(file_systems_, app_id)) {
       CannedSyncableFileSystem* file_system = new CannedSyncableFileSystem(
-          origin, io_task_runner_.get(), file_task_runner_.get());
+          origin, in_memory_env_.get(),
+          io_task_runner_.get(), file_task_runner_.get());
       file_system->SetUp();
 
       SyncStatusCode status = SYNC_STATUS_UNKNOWN;
       local_sync_service_->MaybeInitializeFileSystemContext(
           origin, file_system->file_system_context(),
           CreateResultReceiver(&status));
       base::RunLoop().RunUntilIdle();
       EXPECT_EQ(SYNC_STATUS_OK, status);
 
       file_system->backend()->sync_context()->
@@ skipping 480 matching lines @@
   EXPECT_EQ(1u, CountApp());
   EXPECT_EQ(2u, CountLocalFile(app_id));
   VerifyLocalFile(app_id, base::FilePath(FPL("file")), "abcde");
 
   EXPECT_EQ(3u, CountMetadata());
   EXPECT_EQ(3u, CountTracker());
 }
 
 }  // namespace drive_backend
 }  // namespace sync_file_system