Chrome OS fix build (do not try to check out windows-only libraries).

Bug: 812581
Change-Id: Idb9ff4831263c31b21292342804bd6633f993878
Reviewed-on: https://chromium-review.googlesource.com/923412Reviewed-by: Ryan Tseng <hinoka@chromium.org>
Commit-Queue: Alexander Alekseev <alemate@chromium.org>
Cr-Commit-Position: refs/heads/master@{#537188}

DEPS

@@ -58,7 +58,7 @@ vars = {
   'checkout_libaom': True,
 
   # By default do not check out the Oculus SDK. Only available for Googlers.
-  'checkout_oculus_sdk' : 'checkout_src_internal',
+  'checkout_oculus_sdk' : 'checkout_src_internal and checkout_win',
 
   # TODO(dpranke): change to != "small" once != is supported.
   'checkout_traffic_annotation_tools': 'checkout_configuration == "default"',