[ozone] Keep the queue of surfaceless buffers inside gl_surface_ozone

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

Index: ui/ozone/platform/drm/gpu/page_flip_request.h
diff --git a/ui/ozone/platform/drm/gpu/page_flip_request.h b/ui/ozone/platform/drm/gpu/page_flip_request.h
new file mode 100644
index 0000000000000000000000000000000000000000..c1a63b25389d6847a3ae0287f44b54fd2c61332e
--- /dev/null
+++ b/ui/ozone/platform/drm/gpu/page_flip_request.h
@@ -0,0 +1,30 @@
+// 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.
+
+#ifndef UI_OZONE_PLATFORM_DRM_GPU_PAGE_FLIP_REQUEST_H_
+#define UI_OZONE_PLATFORM_DRM_GPU_PAGE_FLIP_REQUEST_H_
+
+#include "base/callback.h"
+#include "base/memory/scoped_ptr.h"
+
+namespace ui {
+
+class PageFlipRequest : public base::RefCounted<PageFlipRequest> {
+ public:
+  PageFlipRequest(int crtc_count, const base::Closure& callback);
+
+  void Signal();
+
+ private:
+  friend class base::RefCounted<PageFlipRequest>;
+  ~PageFlipRequest();
+
+  base::Closure callback_;
+
+  DISALLOW_COPY_AND_ASSIGN(PageFlipRequest);
+};
+
+}  // namespace ui
+
+#endif  // UI_OZONE_PLATFORM_DRM_GPU_PAGE_FLIP_REQUEST_H_