ozone: ClientPixmapManager passes VGEM fd from browser to renderer.

content/child/BUILD.gn

 # Copyright 2014 The Chromium Authors. All rights reserved.
 # Use of this source code is governed by a BSD-style license that can be
 # found in the LICENSE file.
 
 import("//build/config/crypto.gni")
 import("//build/config/features.gni")
 import("//build/config/ui.gni")
 import("//content/child/child.gni")
 
 source_set("child") {
@@ skipping 116 matching lines @@
   }
 
   if (use_aura && is_mac) {
     # This file is already excluded on non-Mac.
     sources -= [ "npapi/webplugin_delegate_impl_mac.mm" ]
   }
 
   if (is_win || !use_aura) {
     sources -= [ "npapi/webplugin_delegate_impl_aura.cc" ]
   }
+
+  if (!use_ozone) {
+    sources -= [
+      "child_client_native_pixmap_manager_message_filter_ozone.cc",
+      "child_client_native_pixmap_manager_message_filter_ozone.h",
+      "child_client_native_pixmap_manager_ozone.cc",
+      "child_client_native_pixmap_manager_ozone.h",
+    ]
+  }
 }