This is the first CL that tries generating Java -> C++ JNI code. Bug: webrtc:8278 Change-Id: I1ff0df10db0f80a3c84a61a4e82be8f713690a69 Reviewed-on: https://webrtc-review.googlesource.com/20873 Commit-Queue: Magnus Jedvert <magjed@webrtc.org> Reviewed-by: Sami Kalliomäki <sakal@webrtc.org> Cr-Commit-Position: refs/heads/master@{#20592}