Fix webkitGetEntry for non-native files.

Fix webkitGetEntry for non-native files.

Previously webkitGetEntry was broken for non-native files. The method
creates FileEntry in isolated file system from DataTransferItem. The
problem is DataTransferItem only has file system ID of isolated file
system containing native files, though the browser process prepares
different isolated file system for non-native files.

The CL adds new field 'fileSystemId' for types representing a non-native
file and let webkitGetEntry refer the fileSystemId so that it can return
valid FileEntry for non-native files.

BUG=671811
TEST=Drop a file from Chrome OS Files app to Google Drive web.

Review-Url: https://codereview.chromium.org/2565283002
Cr-Commit-Position: refs/heads/master@{#438455}
(cherry picked from commit da08349d4b87496c619152256ab039f6f6d2f28b)

Committed: https://chromium.googlesource.com/chromium/src/+/0fff0c9efd40d9bbe9bc99fa239a89a4f241fedb

[hirono, 2016-12-15 06:53:28]

The CQ bit was checked by hirono@chromium.org

[commit-bot: I haz the power, 2016-12-15 06:53:40]

CQ is trying da patch. Follow status at
 
https://chromium-cq-status.appspot.com/v2/patch-status/codereview.chromium.or...

[commit-bot: I haz the power, 2016-12-15 06:53:41]

The CQ bit was unchecked by commit-bot@chromium.org

[commit-bot: I haz the power, 2016-12-15 06:53:42]

No L-G-T-M from a valid reviewer yet. 
CQ run can only be started by full committers or once the patch has
received an L-G-T-M from a full committer.
Even if an L-G-T-M may have been provided, it was from a non-committer,
_not_ a full super star committer.
See http://www.chromium.org/getting-involved/become-a-committer
Note that this has nothing to do with OWNERS files.

[hirono, 2016-12-15 06:54:52]

The CQ bit was checked by hirono@chromium.org to run a CQ dry run

[commit-bot: I haz the power, 2016-12-15 06:55:11]

Dry run: CQ is trying da patch. Follow status at
 
https://chromium-cq-status.appspot.com/v2/patch-status/codereview.chromium.or...

[commit-bot: I haz the power, 2016-12-15 06:55:13]

The CQ bit was unchecked by commit-bot@chromium.org

[commit-bot: I haz the power, 2016-12-15 06:55:14]

Dry run: CLs for remote refs other than refs/pending/heads/master must contain
NOTRY=true and NOPRESUBMIT=true in order for the CQ to process them

[hirono, 2016-12-15 07:51:02]

Description was changed from

==========
Fix webkitGetEntry for non-native files.

Previously webkitGetEntry was broken for non-native files. The method
creates FileEntry in isolated file system from DataTransferItem. The
problem is DataTransferItem only has file system ID of isolated file
system containing native files, though the browser process prepares
different isolated file system for non-native files.

The CL adds new field 'fileSystemId' for types representing a non-native
file and let webkitGetEntry refer the fileSystemId so that it can return
valid FileEntry for non-native files.

BUG=671811
TEST=Drop a file from Chrome OS Files app to Google Drive web.

Review-Url: https://codereview.chromium.org/2565283002
Cr-Commit-Position: refs/heads/master@{#438455}
(cherry picked from commit da08349d4b87496c619152256ab039f6f6d2f28b)
==========

to

==========
Fix webkitGetEntry for non-native files.

Previously webkitGetEntry was broken for non-native files. The method
creates FileEntry in isolated file system from DataTransferItem. The
problem is DataTransferItem only has file system ID of isolated file
system containing native files, though the browser process prepares
different isolated file system for non-native files.

The CL adds new field 'fileSystemId' for types representing a non-native
file and let webkitGetEntry refer the fileSystemId so that it can return
valid FileEntry for non-native files.

BUG=671811
TEST=Drop a file from Chrome OS Files app to Google Drive web.

Review-Url: https://codereview.chromium.org/2565283002
Cr-Commit-Position: refs/heads/master@{#438455}
(cherry picked from commit da08349d4b87496c619152256ab039f6f6d2f28b)

Committed:
https://chromium.googlesource.com/chromium/src/+/0fff0c9efd40d9bbe9bc99fa239a...
==========

[hirono, 2016-12-15 07:51:08]

Committed patchset #2 (id:20001) manually as
0fff0c9efd40d9bbe9bc99fa239a89a4f241fedb.