Add a description of Sync.LocalDataFailedToLoad histogram.

Add a description of Sync.LocalDataFailedToLoad histogram.

We need it to analyse the spikes of LoginDatabase failures recently.

BUG=419070
Committed: https://crrev.com/955ce18d6120e849d8dde66c1c1562bc3a0d207c
Cr-Commit-Position: refs/heads/master@{#339397}

[vasilii, 2015-07-17 08:42:39]

vasilii@chromium.org changed reviewers:
+ asvitkine@chromium.org

[vasilii, 2015-07-17 08:43:12]

Hi Alexei,

please review the CL.

[Alexei Svitkine (slow), 2015-07-17 15:01:37]

lgtm, in the future it's best to add this in the same CL that adds the histogram
:)

[vasilii, 2015-07-18 08:37:06]

On 2015/07/17 15:01:37, Alexei Svitkine wrote:
> lgtm, in the future it's best to add this in the same CL that adds the
histogram
> :)

It was added 2 years ago but somebody forgot to add it to the histograms.xml ;-)

[vasilii, 2015-07-18 08:37:13]

The CQ bit was checked by vasilii@chromium.org

[commit-bot: I haz the power, 2015-07-18 08:37:18]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1234873007/1

[commit-bot: I haz the power, 2015-07-18 12:07:06]

Committed patchset #1 (id:1)

[commit-bot: I haz the power, 2015-07-18 12:07:58]

Patchset 1 (id:??) landed as
https://crrev.com/955ce18d6120e849d8dde66c1c1562bc3a0d207c
Cr-Commit-Position: refs/heads/master@{#339397}