Consolidate JNI registrations for mojo system.

This CL adds a jni registrar consolidating all jni registrations for
mojo system:
  RegisterCoreImpl
  RegisterWatcherImpl
So that mojo users can just use this only one registrar rather than
calling all above registration functions.

BUG=none

Review-Url: https://codereview.chromium.org/2784493003
Cr-Commit-Position: refs/heads/master@{#463166}


CrOS-Libchrome-Original-Commit: 7e01649ec8b61ba9f5e934bf036eb996530e7d7b
3 files changed
tree: 2cc62fa8d438a871dd075642cacc0185280db640
  1. base/
  2. build/
  3. components/
  4. dbus/
  5. device/
  6. ipc/
  7. mojo/
  8. testing/
  9. third_party/
  10. ui/