ozone: Allocate scanout buffers according to KMS modifiers.

ui/ozone/platform/drm/gpu/hardware_display_plane_manager.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_PLANE_MANAGER_H_
 #define UI_OZONE_PLATFORM_DRM_GPU_HARDWARE_DISPLAY_PLANE_MANAGER_H_
 
 #include <stddef.h>
 #include <stdint.h>
 #include <xf86drmMode.h>
@@ skipping 86 matching lines @@
   }
 
   // Returns all formats which can be scanned out by this PlaneManager. Use
   // IsFormatSupported to find if a given format is supported on a particular
   // plane for a given crtc.
   const std::vector<uint32_t>& GetSupportedFormats() const;
   bool IsFormatSupported(uint32_t fourcc_format,
                          uint32_t z_order,
                          uint32_t crtc_id) const;
 
+  std::vector<uint64_t> GetFormatModifiers(uint32_t crtc_id, uint32_t format);
+
  protected:
   virtual bool SetPlaneData(HardwareDisplayPlaneList* plane_list,
                             HardwareDisplayPlane* hw_plane,
                             const OverlayPlane& overlay,
                             uint32_t crtc_id,
                             const gfx::Rect& src_rect,
                             CrtcController* crtc) = 0;
 
   virtual std::unique_ptr<HardwareDisplayPlane> CreatePlane(
       uint32_t plane_id,
@@ skipping 26 matching lines @@
   std::vector<std::unique_ptr<HardwareDisplayPlane>> planes_;
   std::vector<uint32_t> crtcs_;
   std::vector<uint32_t> supported_formats_;
 
   DISALLOW_COPY_AND_ASSIGN(HardwareDisplayPlaneManager);
 };
 
 }  // namespace ui
 
 #endif  // UI_OZONE_PLATFORM_DRM_GPU_HARDWARE_DISPLAY_PLANE_MANAGER_H_