Implement GetTransferSize for url request.

Currently transfer size is calculated on base of netlog events. That's a misuse of netlog system.

With this patch transfer size could be directly requested from UrlRequest.

In some cases there are multiple network requests for one UrlRequest. In that case we sum "received" bytes for all network requests.

BUG=111052

Review URL: https://codereview.chromium.org/46223003

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@244477 0039d316-1c4b-4281-b951-d872f2087c98
SVN changes up to revision 244477
Remove redundant icon from controlled setting popup bubble.

See screenshot on bug.

BUG=315378

Review URL: https://codereview.chromium.org/125883002

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@244478 0039d316-1c4b-4281-b951-d872f2087c98
SVN changes up to revision 244478