mediaview: Introduce ArcDocumentsProviderRoot.

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

+// Copyright 2016 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 documents provider file system.
+
+#ifndef CHROME_BROWSER_CHROMEOS_ARC_FILEAPI_ARC_DOCUMENTS_PROVIDER_UTIL_H_
+#define CHROME_BROWSER_CHROMEOS_ARC_FILEAPI_ARC_DOCUMENTS_PROVIDER_UTIL_H_
+
+#include <string>
+
+#include "base/files/file_path.h"
+
+namespace storage {
+class FileSystemURL;
+}  // namespace storage
+
+namespace arc {
+
+// The name of ARC documents provider file system mount point.
+constexpr char kDocumentsProviderMountPointName[] = "arc-documents-provider";

[Luis Héctor Chávez, 2016/12/14 20:53:51]

The convention is to declare string constants as "extern const char kXxx[];" in
the headers and then define them in the .cc file:
https://cs.chromium.org/chromium/src/components/arc/intent_helper/intent_cons...

[Shuhei Takahashi, 2016/12/15 02:37:55]

I think it's rather C++03 convention, but I'm fine with it anyway.

+
+// The path of ARC documents provider file system mount point.
+constexpr base::FilePath::CharType kDocumentsProviderMountPointPath[] =
+    "/special/arc-documents-provider";
+
+// Parses a FileSystemURL pointing to ARC documents provider file system.
+// On success, true is returned. All arguments must not be nullptr.
+bool ParseDocumentsProviderUrl(const storage::FileSystemURL& url,
+                               std::string* authority,
+                               std::string* root_document_id,
+                               base::FilePath* path);
+
+}  // namespace arc
+
+#endif  // CHROME_BROWSER_CHROMEOS_ARC_FILEAPI_ARC_DOCUMENTS_PROVIDER_UTIL_H_