Add jsdoc to metadata files.

Add jsdoc to metadata files.

This patch resolves very old todos about missing descriptions of arguments
of methods in the metadata directory.

TEST=No change. Comments only.
BUG=413100
Committed: https://crrev.com/ab46b5e758e9f1f60c2bddaa79b85d4415773529
Cr-Commit-Position: refs/heads/master@{#294357}

[mtomasz, 2014-09-11 07:14:01]

mtomasz@chromium.org changed reviewers:
+ fukino@chromium.org

[mtomasz, 2014-09-11 07:14:09]

@fukino: PTAL. Thanks.

[fukino, 2014-09-11 07:20:31]

lgtm with tiny nits. Thanks!

https://codereview.chromium.org/562763006/diff/1/ui/file_manager/file_manager...
File ui/file_manager/file_manager/foreground/js/metadata/exif_parser.js (right):

https://codereview.chromium.org/562763006/diff/1/ui/file_manager/file_manager...
ui/file_manager/file_manager/foreground/js/metadata/exif_parser.js:46: * @param
{function} errorCallback Error callback/
nit: Ending with '/'.

https://codereview.chromium.org/562763006/diff/1/ui/file_manager/file_manager...
ui/file_manager/file_manager/foreground/js/metadata/exif_parser.js:68: * @param
{function} errorCallback Error callback/
ditto

[mtomasz, 2014-09-11 07:29:50]

https://codereview.chromium.org/562763006/diff/1/ui/file_manager/file_manager...
File ui/file_manager/file_manager/foreground/js/metadata/exif_parser.js (right):

https://codereview.chromium.org/562763006/diff/1/ui/file_manager/file_manager...
ui/file_manager/file_manager/foreground/js/metadata/exif_parser.js:46: * @param
{function} errorCallback Error callback/
On 2014/09/11 07:20:30, fukino wrote:
> nit: Ending with '/'.

Done.

https://codereview.chromium.org/562763006/diff/1/ui/file_manager/file_manager...
ui/file_manager/file_manager/foreground/js/metadata/exif_parser.js:68: * @param
{function} errorCallback Error callback/
On 2014/09/11 07:20:31, fukino wrote:
> ditto

Done.

[mtomasz, 2014-09-11 07:30:12]

The CQ bit was checked by mtomasz@chromium.org

[commit-bot: I haz the power, 2014-09-11 07:34:43]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patchset/562763006/20001

[commit-bot: I haz the power, 2014-09-11 08:32:25]

Committed patchset #2 (id:20001) as dfde3eeb570f3b11a7aeea3a1c6fb0bd150426e1

[commit-bot: I haz the power, 2014-09-11 08:35:41]

Patchset 2 (id:??) landed as
https://crrev.com/ab46b5e758e9f1f60c2bddaa79b85d4415773529
Cr-Commit-Position: refs/heads/master@{#294357}