Add more functionality to the thread and mutex implementation.

Change-Id: I33b2e53acb4c4c6653f13f1bbdd77cc7ce27e581
diff --git a/src/runtime.h b/src/runtime.h
index 2afd9f0..495ab1c 100644
--- a/src/runtime.h
+++ b/src/runtime.h
@@ -3,6 +3,8 @@
 #ifndef ART_SRC_RUNTIME_H_
 #define ART_SRC_RUNTIME_H_
 
+#include "src/thread.h"
+
 namespace art {
 
 class Runtime {
@@ -11,10 +13,15 @@
   static void Shutdown();
 
   static void Compile(const char* filename);
+
+  void SetThreadList(ThreadList* thread_list) {
+    thread_list_ = thread_list;
+  }
+
+ private:
+  ThreadList* thread_list_;
 };
 
 }  // namespace art
 
-namespace r = art;
-
 #endif  // ART_SRC_RUNTIME_H_