Added daily UMA for non-data-reduction-proxy data usage when the proxy is enabled.

BUG=325325

Review URL: https://codereview.chromium.org/106113002

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@239897 0039d316-1c4b-4281-b951-d872f2087c98
IOThread::~IOThread() {
  BrowserThread::SetDelegate(BrowserThread::IO, NULL);

  pref_proxy_config_tracker_->DetachFromPrefService();
  DCHECK(!globals_);
}

IOThread::~IOThread() {
  BrowserThread::SetDelegate(BrowserThread::IO, NULL);

  pref_proxy_config_tracker_->DetachFromPrefService();
  DCHECK(!globals_);
}
