ozone: dri: add synchronous SwapBuffers support on surfaceless

ui/ozone/platform/dri/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_DRI_HARDWARE_DISPLAY_CONTROLLER_H_
 #define UI_OZONE_PLATFORM_DRI_HARDWARE_DISPLAY_CONTROLLER_H_
 
 #include <stddef.h>
 #include <stdint.h>
 #include <xf86drmMode.h>
@@ skipping 105 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(const base::Closure& callback);
+  bool SchedulePageFlip(bool is_sync, const base::Closure& callback);
 
   // 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 25 matching lines @@
 
   void ProcessPageFlipRequest();
 
   void ClearPendingRequests();
 
   // PageFlipObserver:
   void OnPageFlipEvent() override;
 
   struct PageFlipRequest {
     PageFlipRequest(const OverlayPlaneList& planes,
+                    bool is_sync,
                     const base::Closure& callback);
     ~PageFlipRequest();
 
     OverlayPlaneList planes;
+    bool is_sync;
     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_;
   OverlayPlaneList pending_planes_;
   std::deque<PageFlipRequest> requests_;
   scoped_refptr<ScanoutBuffer> cursor_buffer_;
 
@@ skipping 11 matching lines @@
   drmModeModeInfo mode_;
 
   bool is_disabled_;
 
   DISALLOW_COPY_AND_ASSIGN(HardwareDisplayController);
 };
 
 }  // namespace ui
 
 #endif  // UI_OZONE_PLATFORM_DRI_HARDWARE_DISPLAY_CONTROLLER_H_