tree 26fd397fb3e230aa866e1db0983a0942a8b3b21d
parent 1379688cc8338722827bea2dba1d5f8a63d71b5d
author Brian Slesinsky <skybrian@google.com> 1416615520 -0800
committer Gerrit Code Review <noreply-gerritcodereview@google.com> 1416615901 +0000

Introduce PersistentUnitCache.BackgroundService

Moved all async operations to it.

Separated out the operations that update the memory cache
from those that update the disk cache.

Refactored and commented the code that loads units from the
disk cache.

Improved tracing.

Change-Id: I1f91ff9261e6a988e0bc6efba9fe444773dc159d
Review-Link: https://gwt-review.googlesource.com/#/c/10440/