Reland ServiceWorkerCache stitching

Reland ServiceWorkerCache stitching

The old CL needed a rebase before landing.  Trying again.

Reland of: https://codereview.chromium.org/580063003/

BUG=392621
Committed: https://crrev.com/76c9b5b71b41eadc7176ffd88a8d6c46c804a072
Cr-Commit-Position: refs/heads/master@{#297894}

[jkarlin, 2014-10-02 17:43:00]

jkarlin@chromium.org changed reviewers:
+ horo@chromium.org, michaeln@chromium.org

[jkarlin, 2014-10-02 17:43:00]

michaeln@chromium.org: Please review changes in all

horo@chromium.org: Please review changes in all

This is a simple rebase so that the cache stitch can reland.  

Thanks!

[michaeln, 2014-10-02 19:37:38]

still lgtm

also this class looks pretty unit testable (although it might help to utilize
the abstract IPC::Sender interface in ipc_sender.h instead of coding directly to
the EmbeddedWorker interface)

[jkarlin, 2014-10-02 20:40:31]

On 2014/10/02 19:37:38, michaeln wrote:
> still lgtm
> 
> also this class looks pretty unit testable (although it might help to utilize
> the abstract IPC::Sender interface in ipc_sender.h instead of coding directly
to
> the EmbeddedWorker interface)

Acknowledged, and thanks!

[jkarlin, 2014-10-02 20:40:35]

The CQ bit was checked by jkarlin@chromium.org

[commit-bot: I haz the power, 2014-10-02 20:42:04]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/622783003/20001

[commit-bot: I haz the power, 2014-10-02 20:47:00]

Committed patchset #2 (id:20001) as 307ad3bde967362c5e14ddf5f65f9501dfd6abfa

[commit-bot: I haz the power, 2014-10-02 20:47:33]

Patchset 2 (id:??) landed as
https://crrev.com/76c9b5b71b41eadc7176ffd88a8d6c46c804a072
Cr-Commit-Position: refs/heads/master@{#297894}