Only use SiteInstance process reuse for ServiceWorker with no failures

Only use SiteInstance process reuse for ServiceWorker with no failures

This CL ensures we will only attempt to use the SiteInstance process
reuse mechanism when creating a SiteInstance for a ServiceWorker when
the ServiceWorker has not failed to start. Otherwise, we will try to
start it in a brand new process.

BUG=728030
Review-Url: https://codereview.chromium.org/2925623004
Cr-Original-Commit-Position: refs/heads/master@{#477493}
Review-Url: https://codereview.chromium.org/2927973002 .
Cr-Commit-Position: refs/branch-heads/3112@{#255}
Cr-Branched-From: b6460e24cf59f429d69de255538d0fc7a425ccf9-refs/heads/master@{#474897}
Committed: https://chromium.googlesource.com/chromium/src/+/acaa6e0bf4e2df67012aa1e055d6233e6920d958

[jam, 2017-06-08 17:14:18]

Description was changed from

==========
Only use SiteInstance process reuse for ServiceWorker with no failures

This CL ensures we will only attempt to use the SiteInstance process
reuse mechanism when creating a SiteInstance for a ServiceWorker when
the ServiceWorker has not failed to start. Otherwise, we will try to
start it in a brand new process.

BUG=728030

Review-Url: https://codereview.chromium.org/2925623004
Cr-Commit-Position: refs/heads/master@{#477493}
(cherry picked from commit 47dc328bb08ac9c66848eeaf68fc8e96a39975cb)
==========

to

==========
Only use SiteInstance process reuse for ServiceWorker with no failures

This CL ensures we will only attempt to use the SiteInstance process
reuse mechanism when creating a SiteInstance for a ServiceWorker when
the ServiceWorker has not failed to start. Otherwise, we will try to
start it in a brand new process.

BUG=728030

Review-Url: https://codereview.chromium.org/2925623004
Cr-Original-Commit-Position: refs/heads/master@{#477493}
Review-Url: https://codereview.chromium.org/2927973002 .
Cr-Commit-Position: refs/branch-heads/3112@{#255}
Cr-Branched-From:
b6460e24cf59f429d69de255538d0fc7a425ccf9-refs/heads/master@{#474897}
Committed:
https://chromium.googlesource.com/chromium/src/+/acaa6e0bf4e2df67012aa1e055d6...
==========

[jam, 2017-06-08 17:14:20]

Committed patchset #1 (id:1) manually as
acaa6e0bf4e2df67012aa1e055d6233e6920d958.