Rename url_request_[context_]peer.* into url_request_[context_]adapter.*

BUG=390267

Review URL: https://codereview.chromium.org/453053002

Cr-Commit-Position: refs/heads/master@{#288441}
git-svn-id: svn://svn.chromium.org/chrome/trunk/src@288441 0039d316-1c4b-4281-b951-d872f2087c98
11 files changed