Refactor in preparation for SPDY 4, part 1.

Zero behavioral change to the on-the-wire format nor protocol semantics.

This lands server change 40997047.

Also create spdy_protocol.cc and move some functions to it to
avoid clang warnings.


Review URL: https://chromiumcodereview.appspot.com/12220116

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@182053 0039d316-1c4b-4281-b951-d872f2087c98
7 files changed