GitLab

ExtensionGarbageCollector collects isolated storages of disabled apps as garbages,
this may cause unexpected data loss for temporarily disabled extensions.
This CL protects non-enabled installed app's isolated storage from GC.

BUG=328637
R=ajwong@chromium.org, mek@chromium.org, rdevlin.cronin@chromium.org

Review URL: https://codereview.chromium.org/247113002

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@266473 0039d316-1c4b-4281-b951-d872f2087c98