Remove OnConfigNegotiated from QuicConnectionVisiterInterface.

QuicConnection never calls visitor_->OnConfigNegotiated.
OnConfigNegotiated is only called by QuicCryptoStream on QuicSession.

Merge internal CL: 61467714

Remove the unused server_config_id_ member from
QuicCryptoClientConfig::CachedState.

Merge internal CL: 61394953

R=rch@chromium.org,rtenneti@chromium.org
BUG=none
TEST=none

Review URL: https://codereview.chromium.org/162493003

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@251204 0039d316-1c4b-4281-b951-d872f2087c98
SVN changes up to revision 251204
Make all the files mapped in when running interactive_ui_tests read only.

This means no file can be opened for write during the test run.

R=csharp@chromium.org
NOTRY=true
BUG=116251

Review URL: https://codereview.chromium.org/163553007

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@251205 0039d316-1c4b-4281-b951-d872f2087c98
SVN changes up to revision 251205