Mojo: Factor MessageInTransit secondary buffer stuff out into a separate class.

Also write a big comment explaining what I'm going to do.

R=darin@chromium.org

Review URL: https://codereview.chromium.org/265753006

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@268032 0039d316-1c4b-4281-b951-d872f2087c98


CrOS-Libchrome-Original-Commit: 68d3f6bbacbde53e968ae36ae3e4231ea1a8be4b
11 files changed
tree: 8f9aab25335b13cf138d87c6a22dfc3eaf9ea343
  1. base/
  2. build/
  3. components/
  4. dbus/
  5. device/
  6. ipc/
  7. mojo/
  8. testing/
  9. third_party/
  10. ui/