IndexedDB: fsync after transactions.
IndexedDB corruption rose, only on CrOS, in the 32 release. Included in
that release was a change that stopped calling fsync after transactions
commit. It is the only IDB change that possibly sacrficed stability to get
better performance. So: revert it and see if corruption jumps back to 31
levels.
BUG=299831,338385
Review URL: https://codereview.chromium.org/
137423006
git-svn-id: svn://svn.chromium.org/chrome/trunk/src@247351 0039d316-1c4b-4281-b951-d872f2087c98