Revert "compositor: Fix texture flipping for SW mirroring with surfaceless"

content/test/BUILD.gn

Index: content/test/BUILD.gn
diff --git a/content/test/BUILD.gn b/content/test/BUILD.gn
index 787c18e6ba9f6a1ee45bf119e286cde81105d508..d33c91f8ae15537da9cda5e5487fa3bfbfa519af 100644
--- a/content/test/BUILD.gn
+++ b/content/test/BUILD.gn
@@ -595,7 +595,6 @@ if (!is_mac) {  # TODO(GYP) enable on Mac once it links.
     if (!use_aura && !is_mac) {
       sources -= [
         "../browser/compositor/buffer_queue_unittest.cc",
-        "../browser/compositor/reflector_impl_unittest.cc",
         "../browser/compositor/software_browser_compositor_output_surface_unittest.cc",
       ]
     }