Audio Player: Don't update the track list when the list is not changed

Audio Player: Don't update the track list when the list is not changed

Previously, when user clicked the audio file on Files.app, the track list was updated unexpectedly and the current track index was set to the default (the first file) for a very short time just before the index was updated to the selected file. This unexpected change in short period made the playback time reset and caused the issue (crbug.com/395868). This patch fixes this issue.

BUG=395868
TEST=none

Committed: https://crrev.com/9a2e0a8a8d6a7c972fb18c0be66c85e498e77425
Cr-Commit-Position: refs/heads/master@{#292565}

[yoshiki, 2014-08-27 08:58:09]

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

[yoshiki, 2014-08-27 08:58:24]

@fukino-san, could you take a look? Thanks

[fukino, 2014-08-27 11:09:49]

On 2014/08/27 08:58:24, yoshiki wrote:
> @fukino-san, could you take a look? Thanks

lgtm, but please add a description about why this change resolve the issue.
Thanks!

[yoshiki, 2014-08-29 02:36:04]

The CQ bit was checked by yoshiki@chromium.org

[commit-bot: I haz the power, 2014-08-29 02:38:01]

CQ is trying da patch. Follow status at
 https://chromium-status.appspot.com/cq/yoshiki@chromium.org/515443002/1

[commit-bot: I haz the power, 2014-08-29 03:34:46]

Committed patchset #1 (id:1) as 160602786710dc352104ac56ed5c90c37322f64e

[commit-bot: I haz the power, 2014-09-10 03:06:01]

Patchset 1 (id:??) landed as
https://crrev.com/9a2e0a8a8d6a7c972fb18c0be66c85e498e77425
Cr-Commit-Position: refs/heads/master@{#292565}