[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..956ada10e1eeb521e022dbd392ebf53ad0ee3ce5
--- /dev/null
+++ b/ui/ozone/platform/drm/gpu/page_flip_request.h
@@ -0,0 +1,24 @@
+// 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"
+#include "ui/ozone/ozone_export.h"
+
+namespace ui {
+
+class PageFlipRequest : public base::RefCounted<PageFlipRequest> {
+ public:
+  PageFlipRequest(int crtc_count, const base::Closure& callback);
+  ~PageFlipRequest();

[dnicoara, 2015/04/23 15:34:57]

I believe you'll need to make the destructor private due to ref counting;
otherwise clang will complain.

+
+  base::Closure callback;

[dnicoara, 2015/04/23 15:34:56]

And for style guide consistency this should be private. Just add a
Signal()/OnPageflip() function to run the callback.

+};
+
+}  // namespace ui
+
+#endif  // UI_OZONE_PLATFORM_DRM_GPU_PAGE_FLIP_REQUEST_H_