Add histograms for zero-rtt-connections for http vs https
r=rch
BUG=331599

Review URL: https://codereview.chromium.org/100583009

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@243017 0039d316-1c4b-4281-b951-d872f2087c98
Revert "Disable TabCaptureApiTest.EndToEnd on Mac because it's flaking on trybots."

BUG=326328
TBR=jam

Review URL: https://codereview.chromium.org/101693012

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@243018 0039d316-1c4b-4281-b951-d872f2087c98
SVN changes up to revision 243018