Remove webrtc/base/move.h, and make types move-only manually

In days of yore, move.h contained complicated macros for approximating
move-only behavior in C++03. But since we live in the future now, and
can rely on C++11 features---including real move semantics!---it makes
more sense to just write the handful of required lines by hand in each
move-only class.

(We only live in the near future, though, not in some sci-fi
intergalactic civilization singularity type future, so we have to
define Pass() methods for these classes since we're not allowed to use
std::move().)

R=tommi@webrtc.org

Review URL: https://webrtc-codereview.appspot.com/45099004

Cr-Commit-Position: refs/heads/master@{#9060}
3 files changed