ozone/drm: Only reuse ScanoutBuffers with compatible modifiers

ui/ozone/platform/drm/gpu/gbm_buffer.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_GBM_BUFFER_H_
 #define UI_OZONE_PLATFORM_DRM_GPU_GBM_BUFFER_H_
 
 #include <vector>
 
 #include "base/files/scoped_file.h"
@@ skipping 30 matching lines @@
       std::vector<base::ScopedFD>&& fds,
       const std::vector<gfx::NativePixmapPlane>& planes);
   uint32_t GetFormat() const { return format_; }
   uint32_t GetFlags() const { return flags_; }
   bool AreFdsValid() const;
   size_t GetFdCount() const;
   int GetFd(size_t plane) const;
   int GetStride(size_t plane) const;
   int GetOffset(size_t plane) const;
   size_t GetSize(size_t plane) const;
-  uint64_t GetFormatModifier(size_t plane) const;
   gfx::Size GetSize() const override;
 
  private:
   GbmBuffer(const scoped_refptr<GbmDevice>& gbm,
             gbm_bo* bo,
             uint32_t format,
             uint32_t flags,
             uint64_t modifier,
             uint32_t addfb_flags,
             std::vector<base::ScopedFD>&& fds,
@@ skipping 59 matching lines @@
   // this Pixmap. This holds the processed buffer.
   scoped_refptr<GbmPixmap> processed_pixmap_;
   ProcessingCallback processing_callback_;
 
   DISALLOW_COPY_AND_ASSIGN(GbmPixmap);
 };
 
 }  // namespace ui
 
 #endif  // UI_OZONE_PLATFORM_DRM_GPU_GBM_BUFFER_H_