Refactor "IsUnderDriveMountPoint" in v2 app code for generalization to non-Drive volumes.

chrome/browser/chromeos/file_manager/filesystem_api_util.h

+// 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.
+//
+// The file contains utility functions to implement chrome.fileSystem API for
+// file paths that do not directly map to host machine's file system path, such
+// as Google Drive or virtual volumes provided by fileSystemProvider extensions.
+
+#ifndef CHROME_BROWSER_CHROMEOS_FILE_MANAGER_FILESYSTEM_API_UTIL_H_
+#define CHROME_BROWSER_CHROMEOS_FILE_MANAGER_FILESYSTEM_API_UTIL_H_
+
+#include <string>
+
+#include "base/callback_forward.h"
+
+class Profile;
+
+namespace base {
+class FilePath;
+}  // namespace base
+
+namespace file_manager {
+namespace util {
+
+// Checks whether the given |path| points to a non-local filesystem that
+// requires special handling.
+bool IsUnderNonNativeLocalPath(Profile* profile, const base::FilePath& path);
+
+// Returns the mime type of the file pointed by |path|, and asynchronously sends
+// the result to |callback|.
+void GetNonNativeLocalPathMimeType(
+    Profile* profile,
+    const base::FilePath& path,
+    const base::Callback<void(bool, const std::string&)>& callback);
+
+// Checks whether the |path| points to a directory, and asynchronously sends
+// the result to |callback|.
+void IsNonNativeLocalPathDirectory(
+    Profile* profile,
+    const base::FilePath& path,
+    const base::Callback<void(bool)>& callback);
+
+// Prepares a writable file at |path|, i.e., creates a file there if it didn't
+// exist, and asynchronously sends to |callback| whether it succeeded.
+void PrepareNonNativeLocalPathWritableFile(
+    Profile* profile,
+    const base::FilePath& path,
+    const base::Callback<void(bool)>& callback);
+
+}  // namespace util
+}  // namespace file_manager
+
+#endif  // CHROME_BROWSER_CHROMEOS_FILE_MANAGER_FILESYSTEM_API_UTIL_H_