Change ownership of the parameters to ServiceWorkerCache:: Put and Match.

Change ownership of the parameters to ServiceWorkerCache:: Put and Match.

These functions used to take unowned raw pointers as arguments.  Now the functions own them and they're scoped_ptrs.  This both makes ownership clearer and allows for the functions to terminate early without calling their callbacks (needed for a downstream change to run CreateBackend lazily).

Related CLs:
* 1. https://crrev.com/542703002: Change ownership of the parameters to ServiceWorkerCache:: Put and Match.
2. https://crrev.com/545533002: Move ServiceWorkerCache backend creation to a lazy init function.
3. https://crrev.com/548533002: Make ServiceWorkerCacheStorage::CacheLoader::LoadCache synchronous
4. https://crrev.com/549493002: Expose ServiceWorkerCache objects to ServiceWorkerCacheStorageManager clients.

BUG=392621
Committed: https://crrev.com/9f0f48cb851f273478579c14b3059acc8009b295
Cr-Commit-Position: refs/heads/master@{#294366}

[jkarlin, 2014-09-05 16:09:07]

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

[jkarlin, 2014-09-05 16:09:07]

Please take a look at everything, thanks!

[michaeln1, 2014-09-05 22:43:51]

lgtm

[michaeln, 2014-09-11 00:48:11]

wth... lgtm 2

[jkarlin, 2014-09-11 09:22:33]

The CQ bit was checked by jkarlin@chromium.org

[commit-bot: I haz the power, 2014-09-11 09:23:18]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patchset/542703002/40001

[commit-bot: I haz the power, 2014-09-11 10:20:58]

Committed patchset #3 (id:40001) as 1d772124f2455d469520aeede63a32f487b46981

[commit-bot: I haz the power, 2014-09-11 10:24:56]

Patchset 3 (id:??) landed as
https://crrev.com/9f0f48cb851f273478579c14b3059acc8009b295
Cr-Commit-Position: refs/heads/master@{#294366}