Implement snapshotting for non-Drive non-local file systems.

chrome/browser/chromeos/extensions/file_manager/private_api_util.cc

Index: chrome/browser/chromeos/extensions/file_manager/private_api_util.cc
diff --git a/chrome/browser/chromeos/extensions/file_manager/private_api_util.cc b/chrome/browser/chromeos/extensions/file_manager/private_api_util.cc
index e191f6f1423d6c84c5bc0c82d78ac2e99674ced8..044b8c85257484cf0226b8356fdaef7314037768 100644
--- a/chrome/browser/chromeos/extensions/file_manager/private_api_util.cc
+++ b/chrome/browser/chromeos/extensions/file_manager/private_api_util.cc
@@ -17,6 +17,7 @@
 #include "chrome/browser/chromeos/file_manager/fileapi_util.h"
 #include "chrome/browser/chromeos/file_manager/filesystem_api_util.h"
 #include "chrome/browser/chromeos/file_manager/path_util.h"
+#include "chrome/browser/chromeos/file_manager/snapshot_manager.h"
 #include "chrome/browser/chromeos/file_manager/volume_manager.h"
 #include "chrome/browser/chromeos/fileapi/file_system_backend.h"
 #include "chrome/browser/profiles/profile.h"
@@ -72,9 +73,8 @@ void GetFileNativeLocalPathForOpening(Profile* profile,
     return;
   }
 
-  // TODO(kinaba) crbug.com/383207 implement this.
-  NOTREACHED();
-  callback.Run(base::FilePath());
+  VolumeManager::Get(profile)->snapshot_manager()->CreateManagedSnapshot(
+      path, callback);
 }
 
 // Gets a resolved local file path of a non native |path| for file saving.