[Easy Unlock] Update strings to inform users about Bluetooth use and to tell a clearer story.

[Easy Unlock] Update strings to inform users about Bluetooth use and to tell a clearer story.

BUG=409100
R=tengs@chromium.org

Committed: https://crrev.com/1459abf9108520dcd3bc4b42fd2703bbb9582965
Cr-Commit-Position: refs/heads/master@{#296756}

[Ilya Sherman, 2014-09-24 00:32:39]

This CL is mostly complete.  The one missing piece that I'm aware of is setting
the user's Gmail address in the localized string.

[Ilya Sherman, 2014-09-24 21:51:55]

Now fully complete.

[Tim Song, 2014-09-24 22:11:57]

lgtm

[Tim Song, 2014-09-24 22:12:07]

The CQ bit was checked by tengs@chromium.org

[commit-bot: I haz the power, 2014-09-24 22:13:23]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/597803002/20001

[commit-bot: I haz the power, 2014-09-24 22:40:04]

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

[commit-bot: I haz the power, 2014-09-24 22:40:05]

Try jobs failed on following builders:
  linux_chromium_gn_rel on tryserver.chromium.linux
(http://build.chromium.org/p/tryserver.chromium.linux/builders/linux_chromium_...)
  linux_chromium_rel_swarming on tryserver.chromium.linux
(http://build.chromium.org/p/tryserver.chromium.linux/builders/linux_chromium_...)
  mac_chromium_compile_dbg on tryserver.chromium.mac
(http://build.chromium.org/p/tryserver.chromium.mac/builders/mac_chromium_comp...)

[Tim Song, 2014-09-25 17:33:55]

The CQ bit was checked by tengs@chromium.org

[commit-bot: I haz the power, 2014-09-25 17:34:18]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/597803002/20001

[Tim Song, 2014-09-25 17:34:44]

The CQ bit was unchecked by tengs@chromium.org

[Ilya Sherman, 2014-09-25 18:03:53]

The CQ bit was checked by isherman@chromium.org

[Ilya Sherman, 2014-09-25 18:04:49]

*sigh*, I ran an upload+commit command for this CL yesterday as I was leaving,
but didn't notice that it put up a prompt rather than finishing the upload.  My
bad.

[commit-bot: I haz the power, 2014-09-25 18:05:01]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/597803002/40001

[commit-bot: I haz the power, 2014-09-25 19:16:07]

Committed patchset #3 (id:40001) as 45ae5213b40652743ca918b27c21ff81d20e7ee9

[commit-bot: I haz the power, 2014-09-25 19:17:20]

Patchset 3 (id:??) landed as
https://crrev.com/1459abf9108520dcd3bc4b42fd2703bbb9582965
Cr-Commit-Position: refs/heads/master@{#296756}