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

chrome/browser/sync_file_system/local/canned_syncable_file_system.cc

 // Copyright 2013 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 "chrome/browser/sync_file_system/local/canned_syncable_file_system.h"
 
 #include <algorithm>
 #include <iterator>
 
 #include "base/bind.h"
@@ skipping 187 matching lines @@
   base::RunLoop run_loop;
   runner->PostTaskAndReply(
       FROM_HERE, base::Bind(&base::DoNothing), run_loop.QuitClosure());
   run_loop.Run();
 }
 
 }  // namespace
 
 CannedSyncableFileSystem::CannedSyncableFileSystem(
     const GURL& origin,
+    leveldb::Env* env_override,
     base::SingleThreadTaskRunner* io_task_runner,
     base::SingleThreadTaskRunner* file_task_runner)
     : origin_(origin),
       type_(fileapi::kFileSystemTypeSyncable),
       result_(base::File::FILE_OK),
       sync_status_(sync_file_system::SYNC_STATUS_OK),
+      env_override_(env_override),
       io_task_runner_(io_task_runner),
       file_task_runner_(file_task_runner),
       is_filesystem_set_up_(false),
       is_filesystem_opened_(false),
       sync_status_observers_(new ObserverList) {
 }
 
 CannedSyncableFileSystem::~CannedSyncableFileSystem() {}
 
 void CannedSyncableFileSystem::SetUp() {
   ASSERT_FALSE(is_filesystem_set_up_);
   ASSERT_TRUE(data_dir_.CreateUniqueTempDir());
 
   scoped_refptr<quota::SpecialStoragePolicy> storage_policy =
       new quota::MockSpecialStoragePolicy();
 
   quota_manager_ = new QuotaManager(false /* is_incognito */,
                                     data_dir_.path(),
                                     io_task_runner_.get(),
                                     base::MessageLoopProxy::current().get(),
                                     storage_policy.get());
 
   std::vector<std::string> additional_allowed_schemes;
   additional_allowed_schemes.push_back(origin_.scheme());
   fileapi::FileSystemOptions options(
       fileapi::FileSystemOptions::PROFILE_MODE_NORMAL,
-      additional_allowed_schemes);
+      additional_allowed_schemes,
+      env_override_);
 
   ScopedVector<fileapi::FileSystemBackend> additional_backends;
   additional_backends.push_back(SyncFileSystemBackend::CreateForTesting());
 
   file_system_context_ = new FileSystemContext(
       io_task_runner_.get(),
       file_task_runner_.get(),
       fileapi::ExternalMountPoints::CreateRefCounted().get(),
       storage_policy.get(),
       quota_manager_->proxy(),
@@ skipping 488 matching lines @@
   sync_status_ = status;
   base::MessageLoop::current()->Quit();
 }
 
 void CannedSyncableFileSystem::InitializeSyncStatusObserver() {
   ASSERT_TRUE(io_task_runner_->RunsTasksOnCurrentThread());
   backend()->sync_context()->sync_status()->AddObserver(this);
 }
 
 }  // namespace sync_file_system