Merge "Move jniGetReferent to its only user (framework)."

    return res;

}

static inline jobject jniGetReferent(JNIEnv* env, jobject ref) {

    jclass cls = FindClassOrDie(env, "java/lang/ref/Reference");

    jmethodID get = GetMethodIDOrDie(env, cls, "get", "()Ljava/lang/Object;");

    return env->CallObjectMethod(ref, get);

}

/**

 * Read the specified field from jobject, and convert to std::string.

 * If the field cannot be obtained, return defaultValue.