static unsigned long long tryToReclaimDatabaseQuota(SecurityOrigin* originNeedingQuota) {
DatabaseTracker& tracker = WebCore::DatabaseTracker::tracker();
Vector<RefPtr<SecurityOrigin> > origins;
tracker.origins(origins);
unsigned long long reclaimedQuotaBytes = 0;
for (unsigned i = 0; i < origins.size(); i++) {
SecurityOrigin* originToReclaimFrom = origins[i].get();
// Don't try to reclaim from the origin that has exceeded its quota.
if (originToReclaimFrom->equal(originNeedingQuota))
continue;
unsigned long long originUsage = tracker.usageForOrigin(originToReclaimFrom);
unsigned long long originQuota = tracker.quotaForOrigin(originToReclaimFrom);
// If the origin has a quota that is more than it's current usage +1MB, shrink it.
static const int ONE_MB = 1 * 1024 * 1024;
if (originUsage + ONE_MB < originQuota) {
unsigned long long newQuota = originUsage + ONE_MB;
tracker.setQuota(originToReclaimFrom, newQuota);
reclaimedQuotaBytes += originQuota - newQuota;
}
}
return reclaimedQuotaBytes;
}
