stdint types all the way!

Change-Id: I4e4ef3a2002fc59ebd9097087f150eaf3f2a7e08
diff --git a/runtime/gc/space/space_test.h b/runtime/gc/space/space_test.h
index 7211bb4..9f39b80 100644
--- a/runtime/gc/space/space_test.h
+++ b/runtime/gc/space/space_test.h
@@ -110,7 +110,7 @@
   }
 
   typedef MallocSpace* (*CreateSpaceFn)(const std::string& name, size_t initial_size, size_t growth_limit,
-                                        size_t capacity, byte* requested_begin);
+                                        size_t capacity, uint8_t* requested_begin);
   void InitTestBody(CreateSpaceFn create_space);
   void ZygoteSpaceTestBody(CreateSpaceFn create_space);
   void AllocAndFreeTestBody(CreateSpaceFn create_space);