Disk cache: Increase the throttling threshold (100->460ms) for

the current experiment.

BUG=54338
TEST=none
TBR=gavinp


Review URL: http://codereview.chromium.org/6376002

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@71717 0039d316-1c4b-4281-b951-d872f2087c98

net/disk_cache/backend_impl.cc

@@ -1141,7 +1141,7 @@ void BackendImpl::OnOperationCompleted(base::TimeDelta elapsed_time) {
   if (!throttle_requests_)
     return;
 
-  const int kMaxNormalDelayMS = 100;
+  const int kMaxNormalDelayMS = 460;
 
   bool throttling = io_delay_ > kMaxNormalDelayMS;