Adding status to swap complete

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

 // 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_HARDWARE_DISPLAY_CONTROLLER_H_
 #define UI_OZONE_PLATFORM_DRM_GPU_HARDWARE_DISPLAY_CONTROLLER_H_
 
 #include <stddef.h>
 #include <stdint.h>
 #include <xf86drmMode.h>
@@ skipping 72 matching lines @@
 //      |        CRTC1       |
 //      ----------------------
 //
 // Note that it is possible to have more connectors than CRTCs which means that
 // only a subset of connectors can be active independently, showing different
 // framebuffers. Though, in this case, it would be possible to have all
 // connectors active if some use the same CRTC to mirror the display.
 class OZONE_EXPORT HardwareDisplayController
     : public base::SupportsWeakPtr<HardwareDisplayController>,
       public PageFlipObserver {
+  typedef base::Callback<void(int)> PageFlipCallback;
+
  public:
   explicit HardwareDisplayController(scoped_ptr<CrtcController> controller);
   ~HardwareDisplayController() override;
 
   // Performs the initial CRTC configuration. If successful, it will display the
   // framebuffer for |primary| with |mode|.
   bool Modeset(const OverlayPlane& primary, drmModeModeInfo mode);
 
   // Reconfigures the CRTC with the current surface and mode.
   bool Enable();
@@ skipping 12 matching lines @@
   //
   // Between this call and the callback, the framebuffers used in this call
   // should not be modified in any way as it would cause screen tearing if the
   // hardware performed the flip. Note that the frontbuffer should also not
   // be modified as it could still be displayed.
   //
   // Note that this function does not block. Also, this function should not be
   // called again before the page flip occurrs.
   //
   // Returns true if the page flip was successfully registered, false otherwise.
-  bool SchedulePageFlip(bool is_sync, const base::Closure& callback);
+  bool SchedulePageFlip(bool is_sync, const PageFlipCallback& callback);
+  bool SchedulePageFlipWithoutCallback(bool is_sync);
 
   // Set the hardware cursor to show the contents of |surface|.
   bool SetCursor(const scoped_refptr<ScanoutBuffer>& buffer);
 
   bool UnsetCursor();
 
   // Moves the hardware cursor to |location|.
   bool MoveCursor(const gfx::Point& location);
 
   void AddCrtc(scoped_ptr<CrtcController> controller);
@@ skipping 26 matching lines @@
   void ProcessPageFlipRequest();
 
   void ClearPendingRequests();
 
   // PageFlipObserver:
   void OnPageFlipEvent() override;
 
   struct PageFlipRequest {
     PageFlipRequest(const OverlayPlaneList& planes,
                     bool is_sync,
-                    const base::Closure& callback);
+                    const PageFlipCallback& callback);
     ~PageFlipRequest();
 
     OverlayPlaneList planes;
     bool is_sync;
-    base::Closure callback;
+    PageFlipCallback 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_;
@@ skipping 13 matching lines @@
   drmModeModeInfo mode_;
 
   bool is_disabled_;
 
   DISALLOW_COPY_AND_ASSIGN(HardwareDisplayController);
 };
 
 }  // namespace ui
 
 #endif  // UI_OZONE_PLATFORM_DRM_GPU_HARDWARE_DISPLAY_CONTROLLER_H_