Fix ChromeBackgroundServiceWaiter timeout, and restart offline pages

Fix ChromeBackgroundServiceWaiter timeout, and restart offline pages

We had been using a 4 minute max timeout in ChromeBackgroundServcieWatier.
However, the GCM NM docs state that we are only guaranteed 3 minutes.
So, I'm backing off the 4 minute timeout to just under 3 minutes.

Also, since I wrote the file, others have added a mechanism to restore
tasks if Google Play Services (GPS) upgrades, I added a similar mechanism
for OfflinePages.

BUG=705584
Review-Url: https://codereview.chromium.org/2780643002
Cr-Commit-Position: refs/heads/master@{#460432}
(cherry picked from commit bb5b80f0f2882522fb2ead659374aa05ac218c9f)

Review-Url: https://codereview.chromium.org/2776243006 .
Cr-Commit-Position: refs/branch-heads/3029@{#477}
Cr-Branched-From: 939b32ee5ba05c396eef3fd992822fcca9a2e262-refs/heads/master@{#454471}
Committed: https://chromium.googlesource.com/chromium/src/+/1e3f6951e12f953fb21ea932e7df0db8040457d8

[Pete Williamson, 2017-03-29 18:10:02]

Description was changed from

==========
Fix ChromeBackgroundServiceWaiter timeout, and restart offline pages

We had been using a 4 minute max timeout in ChromeBackgroundServcieWatier.
However, the GCM NM docs state that we are only guaranteed 3 minutes.
So, I'm backing off the 4 minute timeout to just under 3 minutes.

Also, since I wrote the file, others have added a mechanism to restore
tasks if Google Play Services (GPS) upgrades, I added a similar mechanism
for OfflinePages.

BUG=705584

Review-Url: https://codereview.chromium.org/2780643002
Cr-Commit-Position: refs/heads/master@{#460432}
(cherry picked from commit bb5b80f0f2882522fb2ead659374aa05ac218c9f)
==========

to

==========
Fix ChromeBackgroundServiceWaiter timeout, and restart offline pages

We had been using a 4 minute max timeout in ChromeBackgroundServcieWatier.
However, the GCM NM docs state that we are only guaranteed 3 minutes.
So, I'm backing off the 4 minute timeout to just under 3 minutes.

Also, since I wrote the file, others have added a mechanism to restore
tasks if Google Play Services (GPS) upgrades, I added a similar mechanism
for OfflinePages.

BUG=705584

Review-Url: https://codereview.chromium.org/2780643002
Cr-Commit-Position: refs/heads/master@{#460432}
(cherry picked from commit bb5b80f0f2882522fb2ead659374aa05ac218c9f)

Review-Url: https://codereview.chromium.org/2776243006 .
Cr-Commit-Position: refs/branch-heads/3029@{#477}
Cr-Branched-From:
939b32ee5ba05c396eef3fd992822fcca9a2e262-refs/heads/master@{#454471}
Committed:
https://chromium.googlesource.com/chromium/src/+/1e3f6951e12f953fb21ea932e7df...
==========

[Pete Williamson, 2017-03-29 18:10:03]

Committed patchset #1 (id:1) manually as
1e3f6951e12f953fb21ea932e7df0db8040457d8.