mediaview: Mount ARC documents provider file system volumes.

chrome/browser/chromeos/arc/fileapi/arc_media_view_util.h

+// Copyright 2017 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.
+//
+// Utilities for ARC Media View.
+
+#ifndef CHROME_BROWSER_CHROMEOS_ARC_FILEAPI_ARC_MEDIA_VIEW_UTIL_H_
+#define CHROME_BROWSER_CHROMEOS_ARC_FILEAPI_ARC_MEDIA_VIEW_UTIL_H_
+
+#include <string>
+
+#include "base/feature_list.h"
+
+namespace arc {
+
+// base::FeatureList feature for ARC media view.
+extern const base::Feature kMediaViewFeature;
+
+// Authority of MediaDocumentsProvider in Android.
+extern const char kMediaDocumentsProviderAuthority[];
+
+// Document IDs of file system roots in MediaDocumentsProvider.
+extern const char kImagesRootDocumentId[];
+extern const char kVideosRootDocumentId[];
+extern const char kAudioRootDocumentId[];
+
+// Returns an ID of a Media View volume.
+std::string GetMediaViewVolumeId(const std::string& root_document_id);
+
+}  // namespace arc
+
+#endif  // CHROME_BROWSER_CHROMEOS_ARC_FILEAPI_ARC_MEDIA_VIEW_UTIL_H_