Mojo: Update/add README.md files.

Also move async_waiter.h from c/system to c/environment. (It's not a
part of the system API per se; instead, it defines stuff that the app
must provide to, e.g., the gles2 subsystem. This move makes the
organization of the C subdirectory more closely parallel the C++
subdirectory.)

R=darin@chromium.org

Review URL: https://codereview.chromium.org/244883005

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@265176 0039d316-1c4b-4281-b951-d872f2087c98


CrOS-Libchrome-Original-Commit: 7a6b0c18903ac44371d18f9c88c29536f8c9945f
11 files changed
tree: cc31401067306d6456d6b3fde59a442cd9984b98
  1. base/
  2. build/
  3. components/
  4. dbus/
  5. device/
  6. ipc/
  7. mojo/
  8. testing/
  9. third_party/
  10. ui/