GitLab

With this change, nested filesystems mounted onto isolated context
can remember its original filesystem id, that unblocks the issue 370782
of drag-and-drop support in chromeos::FileSystemBackend.

BUG=370782, 386062
TBR=kaznacheev, benwells, dmichael, sky

Review URL: https://codereview.chromium.org/341043008

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@278666 0039d316-1c4b-4281-b951-d872f2087c98