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diff --git a/components/drive/dummy_file_system.h b/components/drive/dummy_file_system.h
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+++ b/components/drive/dummy_file_system.h
@@ -0,0 +1,111 @@
+// 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 COMPONENTS_DRIVE_DUMMY_FILE_SYSTEM_H_
+#define COMPONENTS_DRIVE_DUMMY_FILE_SYSTEM_H_
+
+#include "components/drive/file_system_interface.h"
+
+namespace drive {
+
+// Dummy implementation of FileSystemInterface. All functions do nothing.
+class DummyFileSystem : public FileSystemInterface {
+ public:
+  ~DummyFileSystem() override {}
+  void AddObserver(FileSystemObserver* observer) override {}
+  void RemoveObserver(FileSystemObserver* observer) override {}
+  void CheckForUpdates() override {}
+  void TransferFileFromLocalToRemote(
+      const base::FilePath& local_src_file_path,
+      const base::FilePath& remote_dest_file_path,
+      const FileOperationCallback& callback) override {}
+  void OpenFile(const base::FilePath& file_path,
+                OpenMode open_mode,
+                const std::string& mime_type,
+                const OpenFileCallback& callback) override {}
+  void Copy(const base::FilePath& src_file_path,
+            const base::FilePath& dest_file_path,
+            bool preserve_last_modified,
+            const FileOperationCallback& callback) override {}
+  void Move(const base::FilePath& src_file_path,
+            const base::FilePath& dest_file_path,
+            const FileOperationCallback& callback) override {}
+  void Remove(const base::FilePath& file_path,
+              bool is_recursive,
+              const FileOperationCallback& callback) override {}
+  void CreateDirectory(const base::FilePath& directory_path,
+                       bool is_exclusive,
+                       bool is_recursive,
+                       const FileOperationCallback& callback) override {}
+  void CreateFile(const base::FilePath& file_path,
+                  bool is_exclusive,
+                  const std::string& mime_type,
+                  const FileOperationCallback& callback) override {}
+  void TouchFile(const base::FilePath& file_path,
+                 const base::Time& last_access_time,
+                 const base::Time& last_modified_time,
+                 const FileOperationCallback& callback) override {}
+  void TruncateFile(const base::FilePath& file_path,
+                    int64 length,
+                    const FileOperationCallback& callback) override {}
+  void Pin(const base::FilePath& file_path,
+           const FileOperationCallback& callback) override {}
+  void Unpin(const base::FilePath& file_path,
+             const FileOperationCallback& callback) override {}
+  void GetFile(const base::FilePath& file_path,
+               const GetFileCallback& callback) override {}
+  void GetFileForSaving(const base::FilePath& file_path,
+                        const GetFileCallback& callback) override {}
+  base::Closure GetFileContent(
+      const base::FilePath& file_path,
+      const GetFileContentInitializedCallback& initialized_callback,
+      const google_apis::GetContentCallback& get_content_callback,
+      const FileOperationCallback& completion_callback) override;
+  void GetResourceEntry(const base::FilePath& file_path,
+                        const GetResourceEntryCallback& callback) override {}
+  void ReadDirectory(
+      const base::FilePath& file_path,
+      const ReadDirectoryEntriesCallback& entries_callback,
+      const FileOperationCallback& completion_callback) override {}
+  void Search(const std::string& search_query,
+              const GURL& next_link,
+              const SearchCallback& callback) override {}
+  void SearchMetadata(const std::string& query,
+                      int options,
+                      int at_most_num_matches,
+                      const SearchMetadataCallback& callback) override {}
+  void SearchByHashes(const std::set<std::string>& hashes,
+                      const SearchByHashesCallback& callback) override {}
+  void GetAvailableSpace(const GetAvailableSpaceCallback& callback) override {}
+  void GetShareUrl(const base::FilePath& file_path,
+                   const GURL& embed_origin,
+                   const GetShareUrlCallback& callback) override {}
+  void GetMetadata(const GetFilesystemMetadataCallback& callback) override {}
+  void MarkCacheFileAsMounted(const base::FilePath& drive_file_path,
+                              const MarkMountedCallback& callback) override {}
+  void MarkCacheFileAsUnmounted(
+      const base::FilePath& cache_file_path,
+      const FileOperationCallback& callback) override {}
+  void AddPermission(const base::FilePath& drive_file_path,
+                     const std::string& email,
+                     google_apis::drive::PermissionRole role,
+                     const FileOperationCallback& callback) override {}
+  void SetProperty(const base::FilePath& drive_file_path,
+                   google_apis::drive::Property::Visibility visibility,
+                   const std::string& key,
+                   const std::string& value,
+                   const FileOperationCallback& callback) override {}
+  void Reset(const FileOperationCallback& callback) override {}
+  void GetPathFromResourceId(const std::string& resource_id,
+                             const GetFilePathCallback& callback) override {}
+  void FreeDiskSpaceIfNeededFor(
+      int64 num_bytes,
+      const FreeDiskSpaceCallback& callback) override {}
+  void CalculateEvictableCacheSize(
+      const EvictableCacheSizeCallback& callback) override {}
+};
+
+}  // namespace drive
+
+#endif  // COMPONENTS_DRIVE_DUMMY_FILE_SYSTEM_H_