net: Give more descriptive names for code around the request merging logic.

This is a follow-up patch based on wtc's comments on the earlier patch:
http://codereview.chromium.org/9270030/

BUG=72001
TEST=no logic change


Review URL: http://codereview.chromium.org/9284033

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@118942 0039d316-1c4b-4281-b951-d872f2087c98
4 files changed