Update jni_generator documentation removing GYP.

Now that the Android build is migrated to GN, remove documentation instructing
developers to update GYP files for JNI.

Review-Url: https://codereview.chromium.org/2022283002
Cr-Commit-Position: refs/heads/master@{#396925}


CrOS-Libchrome-Original-Commit: 41c9414ec4745b963a8e07da4d5ecb824817c32a
2 files changed
tree: 175cee8e73eba5b0cbefebc6591edd7f8ef20bd9
  1. base/
  2. build/
  3. components/
  4. dbus/
  5. device/
  6. ipc/
  7. mojo/
  8. testing/
  9. third_party/
  10. ui/