Summary: To perform some JNI optimizations for java we need a reference to the node in the measure function. This updates the API to provide the whole node as input instead of just the context.
Reviewed By: javache
Differential Revision: D4081544
fbshipit-source-id: d49679025cea027cf7b8482898de0a01fe0f9d40
Summary: Don't assume a node with a measure function is a leaf node
Reviewed By: gkassabli
Differential Revision: D4021096
fbshipit-source-id: 7e039239b1697a0ac42dce9f4b7e252a931bad7e