http://searchfox.org/mozilla-central/source/mobile/android/services/src/main/java/org/mozilla/gecko/background/nativecode/NativeCrypto.java started as an interface for native code, shipped in libmozglue.so, to be accessed by the Android Background Services -- in particular, for a fast pbkdf2 implementation for the Firefox Accounts implementation. However, that native implementation is vestigial -- we use a web interface now which does all the pbkdf2 crypto on the fxa-content-server. The remaining consumers of NativeCrypto can be removed as follow-ups to Bug 1229892 or moved into the main Fennec codebase. At that point, NativeCrypto can move to the existing JNI wrappers scheme (@WrapForJNI), and the services code can drop the dependency on libmozglue. That will help making "services" a seperate Gradle project (Bug 1229149) and might help projects like https://github.com/mozilla-mobile/FirefoxData-android move back in-tree.

mcomella, liuche: I think you two are the most knowledgable about FirefoxData-android. NI to you just so you're aware of this, and for one of you to explain what you did in that project around dropping the NativeCrypto dependency.

I worked on the android version (liuche is doing iOS). wrt NativeCrypto, to reduce the method counts of the library, I removed it because it was unused. I started by removing a lot of top-level unused code including the imported fennec dependencies which eventually led to the removal of NativeCrypto. Leave liuche CC for awareness but no action required.

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