Optimizations to fill packets better for the edsm server.
Optimizations to fill packets better for the edsm server.

Problems:
   - the SETTINGS frame was the first packet we'd send, uncorked.
     This was wasting the first packet of our cwnd.
   - uncork was overaggressive.  We now only uncork when there are
     no more packets in our queue.
   - rework the packet sizing to fully fill packets better.

Question - should I remove the MSG_MORE code now?  It seems to be an
alternative way to do corking, but it just doesn't work with the SSL layer.

BUG=none
TEST=n/a

Review URL: http://codereview.chromium.org/6327022

git-svn-id: http://src.chromium.org/svn/trunk/src@72844 4ff67af0-8c30-449e-8e8b-ad334ec8d88c

Former-commit-id: 506d613c6045ae64842e33de871b6e55b7dbd82e
meego-tablet-ux/meego-app-browser,meego-tablet-ux/meego-app-browser,meego-tablet-ux/meego-app-browser,meego-tablet-ux/meego-app-browser,meego-tablet-ux/meego-app-browser,meego-tablet-ux/meego-app-browser,meego-tablet-ux/meego-app-browser,meego-tablet-ux/meego-app-browser,meego-tablet-ux/meego-app-browser,meego-tablet-ux/meego-app-browser