Start adding implementations for runtime-provided native methods.

The library can't do everything...

Change-Id: Ib808c00570c7214aeb2ca058b1a66cacbeb372f1
diff --git a/src/jni_internal.h b/src/jni_internal.h
index 05df3e4..63be779 100644
--- a/src/jni_internal.h
+++ b/src/jni_internal.h
@@ -22,6 +22,9 @@
 
 void JniAbort(const char* jni_function_name);
 
+template<typename T> T Decode(JNIEnv*, jobject);
+template<typename T> T AddLocalReference(JNIEnv*, Object*);
+
 struct JavaVMExt : public JavaVM {
   JavaVMExt(Runtime* runtime, bool check_jni, bool verbose_jni);
   ~JavaVMExt();