bluetooth: Explain why standard names aren't recognized in error message.

bluetooth: Explain why standard names aren't recognized in error message.

Developers are expressing confusion when passing invalid service names,
sometimes because they pass an invalid UUID that nearly looks correct.
Explain more explicitly in the error message what is accepted.

BUG=491441
Committed: https://src.chromium.org/viewvc/blink?view=rev&revision=201234

[scheib, 2015-08-25 22:11:30]

scheib@chromium.org changed reviewers:
+ ortuno@chromium.org

[scheib, 2015-08-25 22:56:57]

improved message.

[ortuno, 2015-08-26 16:07:43]

The CQ bit was checked by ortuno@chromium.org

[ortuno, 2015-08-26 16:07:43]

lgtm

[ortuno, 2015-08-26 16:07:49]

The CQ bit was unchecked by ortuno@chromium.org

[scheib, 2015-08-26 16:52:57]

The CQ bit was checked by scheib@chromium.org

[commit-bot: I haz the power, 2015-08-26 16:53:08]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1315443007/40001
View timeline at
 https://chromium-cq-status.appspot.com/patch-timeline/1315443007/40001

[commit-bot: I haz the power, 2015-08-26 16:57:48]

Committed patchset #3 (id:40001) as
https://src.chromium.org/viewvc/blink?view=rev&revision=201234