[syscalls] Use vmar..._old apis.

Modify existing calls to vmar routines in preparation for changing
the parameter order.

ZX-2264

Test: CQ
Change-Id: I955999c42347790c286b7cacc9cf71623e8a4afc
diff --git a/Tools/MiniBrowser/fuchsia/main.cpp b/Tools/MiniBrowser/fuchsia/main.cpp
index 65d0577..059a4fb 100644
--- a/Tools/MiniBrowser/fuchsia/main.cpp
+++ b/Tools/MiniBrowser/fuchsia/main.cpp
@@ -122,7 +122,7 @@
 
     uintptr_t buffer = 0;
 
-    zx_status_t status = zx_vmar_map(zx_vmar_root_self(), 0, frameBuffer.vmo, 0, size,
+    zx_status_t status = zx_vmar_map_old(zx_vmar_root_self(), 0, frameBuffer.vmo, 0, size,
         ZX_VM_FLAG_PERM_READ | ZX_VM_FLAG_PERM_WRITE, &buffer);
 
     if (status < 0) {