Show GoogleDrive volume in saving dialog that requires naitve path.

Show GoogleDrive volume in saving dialog that requires naitve path.

crrev.com/376073 assumed we cannot create snapshot files for saving and
it hides non-native volumes for saving dialog. However we have special
hack for Google Drive to create snapshot files for saving.

BUG=595503
TEST=do repro steps at the bug

Review URL: https://codereview.chromium.org/1877213002

Cr-Commit-Position: refs/heads/master@{#386619}
(cherry picked from commit 072c195f6a8fb12d4970b889dca8f75779b5533e)

Committed: https://chromium.googlesource.com/chromium/src/+/d7f99ba6a044b92b98981ab02242e0e510da1ff8

[hirono, 2016-04-13 07:42:57]

Description was changed from

==========
Show GoogleDrive volume in saving dialog that requires naitve path.

crrev.com/376073 assumed we cannot create snapshot files for saving and
it hides non-native volumes for saving dialog. However we have special
hack for Google Drive to create snapshot files for saving.

BUG=595503
TEST=do repro steps at the bug

Review URL: https://codereview.chromium.org/1877213002

Cr-Commit-Position: refs/heads/master@{#386619}
(cherry picked from commit 072c195f6a8fb12d4970b889dca8f75779b5533e)
==========

to

==========
Show GoogleDrive volume in saving dialog that requires naitve path.

crrev.com/376073 assumed we cannot create snapshot files for saving and
it hides non-native volumes for saving dialog. However we have special
hack for Google Drive to create snapshot files for saving.

BUG=595503
TEST=do repro steps at the bug

Review URL: https://codereview.chromium.org/1877213002

Cr-Commit-Position: refs/heads/master@{#386619}
(cherry picked from commit 072c195f6a8fb12d4970b889dca8f75779b5533e)

Committed:
https://chromium.googlesource.com/chromium/src/+/d7f99ba6a044b92b98981ab02242...
==========

[hirono, 2016-04-13 07:42:59]

Committed patchset #1 (id:1) manually as
d7f99ba6a044b92b98981ab02242e0e510da1ff8.