Second attempt to land change to remove NativeViewportService and

mojo/services/window_manager/BUILD.gn

Index: mojo/services/window_manager/BUILD.gn
diff --git a/mojo/services/window_manager/BUILD.gn b/mojo/services/window_manager/BUILD.gn
index a060b1b0cdde2399cac983eb48de544dd0caf8e8..e8d933eba6e8102094f9799f622ed2383093acc8 100644
--- a/mojo/services/window_manager/BUILD.gn
+++ b/mojo/services/window_manager/BUILD.gn
@@ -66,12 +66,6 @@ test("mojo_core_window_manager_unittests") {
     "//testing/gtest",
     "//ui/gl",
   ]
-  if (is_linux) {
-    deps += [
-      "//third_party/mesa:osmesa",
-      "//mojo/services/native_viewport",
-    ]
-  }
   if (use_x11) {
     deps += [ "//ui/gfx/x" ]
   }