ozone: ClientPixmapManager passes VGEM fd from browser to renderer.

ui/ozone/platform/test/ozone_platform_test.cc

Index: ui/ozone/platform/test/ozone_platform_test.cc
diff --git a/ui/ozone/platform/test/ozone_platform_test.cc b/ui/ozone/platform/test/ozone_platform_test.cc
index c6da9e3aa73aff483f148a75538f4c894feea749..445b9602a42c215ccb992b84f13c68ccea2d04c4 100644
--- a/ui/ozone/platform/test/ozone_platform_test.cc
+++ b/ui/ozone/platform/test/ozone_platform_test.cc
@@ -76,6 +76,9 @@ class OzonePlatformTest : public OzonePlatform {
   scoped_ptr<NativeDisplayDelegate> CreateNativeDisplayDelegate() override {
     return make_scoped_ptr(new NativeDisplayDelegateOzone());
   }
+  base::ScopedFD OpenClientNativePixmapDevice() const override {
+    return base::ScopedFD();
+  }
 
   void InitializeUI() override {
     window_manager_.reset(new TestWindowManager(file_path_));