GitLab

Provide performance guidelines for the declarative WebRequest API.

BUG=227523
NOTRY=true

Review URL: https://chromiumcodereview.appspot.com/13523005

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@192825 0039d316-1c4b-4281-b951-d872f2087c98