[DevTools] Protocol version 1.2.

Moving most of Schema, Runtime, Debugger, Profiler and Emulation out of experimental.

BUG=635947

Review-Url: https://codereview.chromium.org/2272503002
Cr-Original-Commit-Position: refs/heads/master@{#414241}
Cr-Mirrored-From: https://chromium.googlesource.com/chromium/src
Cr-Mirrored-Commit: 420512c42cfa7ff5260fc6ebc7ae656447cd3b67
3 files changed