Implement as much of VMDebug as we can reasonably do right now.

No hprof and no method tracing, but everything else.

Change-Id: Ifccd1f08e31f34b947c30f1211db788aae674d81
diff --git a/src/jni_internal.h b/src/jni_internal.h
index 38e38fc..736e5db 100644
--- a/src/jni_internal.h
+++ b/src/jni_internal.h
@@ -62,6 +62,8 @@
    */
   void* FindCodeForNativeMethod(Method* m);
 
+  void DumpReferenceTables();
+
   void VisitRoots(Heap::RootVisitor*, void*);
 
   Runtime* runtime;
@@ -104,6 +106,8 @@
   JNIEnvExt(Thread* self, JavaVMExt* vm);
   ~JNIEnvExt();
 
+  void DumpReferenceTables();
+
   Thread* const self;
   JavaVMExt* vm;