Revert of Change Share Extension string for consistency

Revert of Change Share Extension string for consistency (patchset #1 id:1 of https://codereview.chromium.org/2574263002/ )

Reason for revert:
Wrong string.

Original issue's description:
> Change Share Extension string for consistency
> 
> This CL changes the Share Extension string from "Add to Reading List" to
> "Read Later" in order to be consistent with the other usages.
> 
> BUG=673689
> 
> Committed: https://crrev.com/dca2d3d13407eafe6d60103a8dff9e7dfd408926
> Cr-Commit-Position: refs/heads/master@{#439443}

TBR=olivierrobin@chromium.org
# Not skipping CQ checks because original CL landed more than 1 days ago.
BUG=673689

[gambard, 2017-01-02 15:03:58]

The CQ bit was checked by gambard@chromium.org

[gambard, 2017-01-02 15:03:58]

Created Revert of Change Share Extension string for consistency

[commit-bot: I haz the power, 2017-01-02 15:04:06]

CQ is trying da patch. Follow status at
 
https://chromium-cq-status.appspot.com/v2/patch-status/codereview.chromium.or...

[Olivier, 2017-01-02 15:08:33]

The CQ bit was unchecked by olivierrobin@chromium.org

[Olivier, 2017-01-05 07:51:50]

On 2017/01/02 15:04:06, commit-bot: I haz the power wrote:
> CQ is trying da patch. Follow status at
>  
>
https://chromium-cq-status.appspot.com/v2/patch-status/codereview.chromium.or...

Closing after discussion with UX.

[Olivier, 2017-01-05 07:51:59]

Description was changed from

==========
Revert of Change Share Extension string for consistency (patchset #1 id:1 of
https://codereview.chromium.org/2574263002/ )

Reason for revert:
Wrong string.

Original issue's description:
> Change Share Extension string for consistency
> 
> This CL changes the Share Extension string from "Add to Reading List" to
> "Read Later" in order to be consistent with the other usages.
> 
> BUG=673689
> 
> Committed: https://crrev.com/dca2d3d13407eafe6d60103a8dff9e7dfd408926
> Cr-Commit-Position: refs/heads/master@{#439443}

TBR=olivierrobin@chromium.org
# Not skipping CQ checks because original CL landed more than 1 days ago.
BUG=673689
==========

to

==========
Revert of Change Share Extension string for consistency (patchset #1 id:1 of
https://codereview.chromium.org/2574263002/ )

Reason for revert:
Wrong string.

Original issue's description:
> Change Share Extension string for consistency
> 
> This CL changes the Share Extension string from "Add to Reading List" to
> "Read Later" in order to be consistent with the other usages.
> 
> BUG=673689
> 
> Committed: https://crrev.com/dca2d3d13407eafe6d60103a8dff9e7dfd408926
> Cr-Commit-Position: refs/heads/master@{#439443}

TBR=olivierrobin@chromium.org
# Not skipping CQ checks because original CL landed more than 1 days ago.
BUG=673689
==========