ozone/drm: Only reuse ScanoutBuffers with compatible modifiers

ui/ozone/platform/drm/gpu/drm_buffer.cc

 // 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.
 
 #include "ui/ozone/platform/drm/gpu/drm_buffer.h"
 
 #include <drm_fourcc.h>
 
 #include "base/logging.h"
 #include "third_party/skia/include/core/SkSurface.h"
@@ skipping 89 matching lines @@
 }
 
 uint32_t DrmBuffer::GetOpaqueFramebufferId() const {
   return framebuffer_;
 }
 
 uint32_t DrmBuffer::GetOpaqueFramebufferPixelFormat() const {
   return fb_pixel_format_;
 }
 
+uint64_t DrmBuffer::GetFormatModifier() const {
+  return DRM_FORMAT_MOD_NONE;
+}
+
 uint32_t DrmBuffer::GetHandle() const {
   return handle_;
 }
 
 gfx::Size DrmBuffer::GetSize() const {
   return gfx::Size(surface_->width(), surface_->height());
 }
 
 const DrmDevice* DrmBuffer::GetDrmDevice() const {
   return drm_.get();
 }
 
 bool DrmBuffer::RequiresGlFinish() const {
   return false;
 }
 
 }  // namespace ui