Implement ThreadReference.OwnedMonitorsStackDepthInfo.

Change-Id: I5e1ac7b2aeef7b1eac9518eba14a8f6555acd712
diff --git a/src/debugger.h b/src/debugger.h
index b033ace..1acd09b 100644
--- a/src/debugger.h
+++ b/src/debugger.h
@@ -153,7 +153,9 @@
 
   static JDWP::JdwpError GetMonitorInfo(JDWP::ObjectId object_id, JDWP::ExpandBuf* reply)
       SHARED_LOCKS_REQUIRED(Locks::mutator_lock_);
-  static JDWP::JdwpError GetOwnedMonitors(JDWP::ObjectId thread_id, std::vector<JDWP::ObjectId>& monitors)
+  static JDWP::JdwpError GetOwnedMonitors(JDWP::ObjectId thread_id,
+                                          std::vector<JDWP::ObjectId>& monitors,
+                                          std::vector<uint32_t>& stack_depths)
       SHARED_LOCKS_REQUIRED(Locks::mutator_lock_);
   static JDWP::JdwpError GetContendedMonitor(JDWP::ObjectId thread_id, JDWP::ObjectId& contended_monitor)
       SHARED_LOCKS_REQUIRED(Locks::mutator_lock_);