[ozone] Keep the queue of surfaceless buffers inside gl_surface_ozone

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

Index: ui/ozone/platform/drm/gpu/hardware_display_controller.h
diff --git a/ui/ozone/platform/drm/gpu/hardware_display_controller.h b/ui/ozone/platform/drm/gpu/hardware_display_controller.h
index 196b2ddabb397e7c4ab8ef77ad9b28911ae0f2ba..0e7b240b233bc71fe8b7a736c3a56cb20c0d7455 100644
--- a/ui/ozone/platform/drm/gpu/hardware_display_controller.h
+++ b/ui/ozone/platform/drm/gpu/hardware_display_controller.h
@@ -158,8 +158,6 @@ class OZONE_EXPORT HardwareDisplayController
 
   void ProcessPageFlipRequest();
 
-  void ClearPendingRequests();
-
   // PageFlipObserver:
   void OnPageFlipEvent() override;
 
@@ -174,14 +172,7 @@ class OZONE_EXPORT HardwareDisplayController
     base::Closure callback;
   };
 
-  // Buffers need to be declared first so that they are destroyed last. Needed
-  // since the controllers may reference the buffers.
-  OverlayPlaneList current_planes_;
-  // Planes currently being queued without having SchedulePageFlip() called.
-  OverlayPlaneList pending_planes_;
-  // Plane lists for which SchedulePageFlip() was called. They are waiting for
-  // previous page flip events to be completed before they can be serviced.
-  std::deque<PageFlipRequest> requests_;
+  scoped_ptr<PageFlipRequest> page_flip_request_;
   scoped_refptr<ScanoutBuffer> cursor_buffer_;
 
   base::ScopedPtrHashMap<DrmDevice*, HardwareDisplayPlaneList>
@@ -198,6 +189,7 @@ class OZONE_EXPORT HardwareDisplayController
   drmModeModeInfo mode_;
 
   bool is_disabled_;
+  bool ignore_page_flip_event_;
 
   DISALLOW_COPY_AND_ASSIGN(HardwareDisplayController);
 };