arc: Use the MIME type returned by the container to handle content URLs

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

Index: chrome/browser/chromeos/arc/fileapi/arc_content_file_system_url_util.h
diff --git a/chrome/browser/chromeos/arc/fileapi/arc_content_file_system_url_util.h b/chrome/browser/chromeos/arc/fileapi/arc_content_file_system_url_util.h
index 1a49c782e9debbbf5bc65458e09f84f32d0383d6..a6daddc5e9ca3eacaf11212611c3dec634f420c4 100644
--- a/chrome/browser/chromeos/arc/fileapi/arc_content_file_system_url_util.h
+++ b/chrome/browser/chromeos/arc/fileapi/arc_content_file_system_url_util.h
@@ -40,6 +40,12 @@ GURL ExternalFileUrlToArcUrl(const GURL& external_file_url);
 // Converts a FileSystemURL to a URL which can be used within the ARC container.
 GURL FileSystemUrlToArcUrl(const storage::FileSystemURL& url);
 
+// Converts a path which was returned by FileSystemURL::path() (not to be
+// confused with virtual_path()) to a URL which can be used within the ARC
+// container. If the given path is not under the ARC content file system mount
+// point, returns an empty GURL.
+GURL PathToArcUrl(const base::FilePath& path);
+
 }  // namespace arc
 
 #endif  // CHROME_BROWSER_CHROMEOS_ARC_FILEAPI_ARC_CONTENT_FILE_SYSTEM_URL_UTIL_H_