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

chrome/browser/sync_file_system/local/local_file_sync_context.h

 // 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.
 
 #ifndef CHROME_BROWSER_SYNC_FILE_SYSTEM_LOCAL_LOCAL_FILE_SYNC_CONTEXT_H_
 #define CHROME_BROWSER_SYNC_FILE_SYSTEM_LOCAL_LOCAL_FILE_SYNC_CONTEXT_H_
 
 #include <deque>
 #include <map>
 #include <set>
@@ skipping 16 matching lines @@
 
 namespace base {
 class SingleThreadTaskRunner;
 }
 
 namespace fileapi {
 class FileSystemContext;
 class FileSystemURL;
 }
 
+namespace leveldb {
+class Env;
+}
+
 namespace webkit_blob {
 class ScopedFile;
 }
 
 namespace sync_file_system {
 
 class FileChange;
 class LocalFileChangeTracker;
 struct LocalFileSyncInfo;
 class LocalOriginChangeObserver;
@@ skipping 18 matching lines @@
       SyncStatusCode status,
       const LocalFileSyncInfo& sync_file_info,
       webkit_blob::ScopedFile snapshot)>
           LocalFileSyncInfoCallback;
 
   typedef base::Callback<void(SyncStatusCode status,
                               bool has_pending_changes)>
       HasPendingLocalChangeCallback;
 
   LocalFileSyncContext(const base::FilePath& base_path,
+                       leveldb::Env* env_override,
                        base::SingleThreadTaskRunner* ui_task_runner,
                        base::SingleThreadTaskRunner* io_task_runner);
 
   // Initializes |file_system_context| for syncable file operations
   // and registers the it into the internal map.
   // Calling this multiple times for the same file_system_context is valid.
   // This method must be called on UI thread.
   void MaybeInitializeFileSystemContext(
       const GURL& source_url,
       fileapi::FileSystemContext* file_system_context,
@@ skipping 233 matching lines @@
   base::TimeDelta NotifyChangesDuration();
 
   void DidCreateDirectoryForCopyIn(
       fileapi::FileSystemContext* file_system_context,
       const base::FilePath& local_file_path,
       const fileapi::FileSystemURL& dest_url,
       const StatusCallback& callback,
       base::File::Error error);
 
   const base::FilePath local_base_path_;
+  leveldb::Env* env_override_;
 
   scoped_refptr<base::SingleThreadTaskRunner> ui_task_runner_;
   scoped_refptr<base::SingleThreadTaskRunner> io_task_runner_;
 
   // Indicates if the sync service is shutdown.
   bool shutdown_on_ui_;  // Updated and referred only on UI thread.
   bool shutdown_on_io_;  // Updated and referred only on IO thread.
 
   // OperationRunner. This must be accessed only on IO thread.
   scoped_ptr<SyncableFileOperationRunner> operation_runner_;
@@ skipping 28 matching lines @@
   ObserverList<LocalOriginChangeObserver> origin_change_observers_;
 
   int mock_notify_changes_duration_in_sec_;
 
   DISALLOW_COPY_AND_ASSIGN(LocalFileSyncContext);
 };
 
 }  // namespace sync_file_system
 
 #endif  // CHROME_BROWSER_SYNC_FILE_SYSTEM_LOCAL_LOCAL_FILE_SYNC_CONTEXT_H_