[ozone] Keep the queue of surfaceless buffers inside gl_surface_ozone

ui/ozone/platform/drm/gpu/page_flip_request.cc

Index: ui/ozone/platform/drm/gpu/page_flip_request.cc
diff --git a/ui/ozone/platform/drm/gpu/page_flip_request.cc b/ui/ozone/platform/drm/gpu/page_flip_request.cc
new file mode 100644
index 0000000000000000000000000000000000000000..dfca208874abcfd17c8d9941362c1b202328aa7d
--- /dev/null
+++ b/ui/ozone/platform/drm/gpu/page_flip_request.cc
@@ -0,0 +1,22 @@
+// 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.
+
+#include "ui/ozone/platform/drm/gpu/page_flip_request.h"
+
+#include "base/barrier_closure.h"
+
+namespace ui {
+
+PageFlipRequest::PageFlipRequest(int crtc_count, const base::Closure& callback)
+    : callback_(base::BarrierClosure(crtc_count, callback)) {
+}
+
+PageFlipRequest::~PageFlipRequest() {
+}
+
+void PageFlipRequest::Signal() {
+  callback_.Run();
+}
+
+}  // namespace ui