ozone: dri: add synchronous SwapBuffers support on surfaceless

ui/ozone/platform/dri/dri_wrapper.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_DRI_WRAPPER_H_
 #define UI_OZONE_PLATFORM_DRI_DRI_WRAPPER_H_
 
 #include <stdint.h>
 
 #include <vector>
@@ skipping 82 matching lines @@
 
   // Get the DRM details associated with |framebuffer|.
   virtual ScopedDrmFramebufferPtr GetFramebuffer(uint32_t framebuffer);
 
   // Schedules a pageflip for CRTC |crtc_id|. This function will return
   // immediately. Upon completion of the pageflip event, the CRTC will be
   // displaying the buffer with ID |framebuffer| and will have a DRM event
   // queued on |fd_|.
   virtual bool PageFlip(uint32_t crtc_id,
                         uint32_t framebuffer,
+                        bool is_sync,
                         const PageFlipCallback& callback);
 
   // Schedule an overlay to be show during the page flip for CRTC |crtc_id|.
   // |source| location from |framebuffer| will be shown on overlay
   // |overlay_plane|, in the bounds specified by |location| on the screen.
   virtual bool PageFlipOverlay(uint32_t crtc_id,
                                uint32_t framebuffer,
                                const gfx::Rect& location,
                                const gfx::Rect& source,
                                int overlay_plane);
@@ skipping 72 matching lines @@
 
   // Watcher for |fd_| listening for page flip events.
   scoped_refptr<IOWatcher> watcher_;
 
   DISALLOW_COPY_AND_ASSIGN(DriWrapper);
 };
 
 }  // namespace ui
 
 #endif  // UI_OZONE_PLATFORM_DRI_DRI_WRAPPER_H_