Use explicit WebString <-> string16 conversion methods in storage API files

Use explicit WebString <-> string16 conversion methods in storage API files

As we're deprecating implicit conversions for WebString <-> string16
replace them with explicit methods. (See crbug.com/667131 for more
details)

Also adds FilePathToWebString() utility method that does reverse of
WebStringToFilePath.

BUG=667131
Committed: https://crrev.com/6a43aaa91b9ce5fbbb1b4a499a15f0fba43cd79b
Cr-Commit-Position: refs/heads/master@{#439296}

[kinuko, 2016-12-16 15:42:55]

Description was changed from

==========
Use explicit WebString <-> string16 conversion methods in storage API files

Also adds FilePathToWebString() utility method that does reverse of
WebStringToFilePath.

BUG=667131
==========

to

==========
Use explicit WebString <-> string16 conversion methods in storage API files

As we're deprecating implicit conversions for WebString <-> string16
replace them with explicit methods. (See crbug.com/667131 for more
details)

Also adds FilePathToWebString() utility method that does reverse of
WebStringToFilePath.

BUG=667131
==========

[kinuko, 2016-12-16 15:50:34]

kinuko@chromium.org changed reviewers:
+ jsbell@chromium.org

[kinuko, 2016-12-16 15:52:12]

Mind taking a look?  Most changes are mechanical.

[kinuko, 2016-12-16 15:52:17]

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

[commit-bot: I haz the power, 2016-12-16 15:52:29]

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

[jsbell, 2016-12-16 17:21:08]

lgtm

[commit-bot: I haz the power, 2016-12-16 17:34:41]

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

[commit-bot: I haz the power, 2016-12-16 17:34:42]

Dry run: This issue passed the CQ dry run.

[kinuko, 2016-12-17 02:27:39]

The CQ bit was checked by kinuko@chromium.org

[commit-bot: I haz the power, 2016-12-17 02:28:08]

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, 2016-12-17 02:36:02]

CQ is committing da patch.

Bot data: {"patchset_id": 20001, "attempt_start_ts": 1481941659154810,
"parent_rev": "eb04606115ba8fe98367ca975251470e19a17452", "commit_rev":
"166f01c098d67e504b936fb4ea1d0437380005d2"}

[commit-bot: I haz the power, 2016-12-17 02:36:27]

Description was changed from

==========
Use explicit WebString <-> string16 conversion methods in storage API files

As we're deprecating implicit conversions for WebString <-> string16
replace them with explicit methods. (See crbug.com/667131 for more
details)

Also adds FilePathToWebString() utility method that does reverse of
WebStringToFilePath.

BUG=667131
==========

to

==========
Use explicit WebString <-> string16 conversion methods in storage API files

As we're deprecating implicit conversions for WebString <-> string16
replace them with explicit methods. (See crbug.com/667131 for more
details)

Also adds FilePathToWebString() utility method that does reverse of
WebStringToFilePath.

BUG=667131

Review-Url: https://codereview.chromium.org/2586483002
==========

[commit-bot: I haz the power, 2016-12-17 02:36:28]

Committed patchset #2 (id:20001)

[commit-bot: I haz the power, 2016-12-17 02:40:15]

Description was changed from

==========
Use explicit WebString <-> string16 conversion methods in storage API files

As we're deprecating implicit conversions for WebString <-> string16
replace them with explicit methods. (See crbug.com/667131 for more
details)

Also adds FilePathToWebString() utility method that does reverse of
WebStringToFilePath.

BUG=667131

Review-Url: https://codereview.chromium.org/2586483002
==========

to

==========
Use explicit WebString <-> string16 conversion methods in storage API files

As we're deprecating implicit conversions for WebString <-> string16
replace them with explicit methods. (See crbug.com/667131 for more
details)

Also adds FilePathToWebString() utility method that does reverse of
WebStringToFilePath.

BUG=667131

Committed: https://crrev.com/6a43aaa91b9ce5fbbb1b4a499a15f0fba43cd79b
Cr-Commit-Position: refs/heads/master@{#439296}
==========

[commit-bot: I haz the power, 2016-12-17 02:40:16]

Patchset 2 (id:??) landed as
https://crrev.com/6a43aaa91b9ce5fbbb1b4a499a15f0fba43cd79b
Cr-Commit-Position: refs/heads/master@{#439296}