Revert of ozone/drm: Only reuse ScanoutBuffers with compatible modifiers

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

 // Copyright 2015 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/mock_hardware_display_plane_manager.h"
 
 #include <drm_fourcc.h>
 #include <utility>
 
 #include "testing/gtest/include/gtest/gtest.h"
 #include "ui/ozone/platform/drm/gpu/fake_plane_info.h"
 #include "ui/ozone/platform/drm/gpu/mock_scanout_buffer.h"
 
 namespace ui {
 
 MockHardwareDisplayPlaneManager::MockHardwareDisplayPlaneManager(
     DrmDevice* drm,
     const std::vector<uint32_t>& crtcs,
     uint32_t planes_per_crtc) {
   const int kPlaneBaseId = 50;
-  const struct drm_format_modifier linear_modifier { 0x1, DRM_FORMAT_MOD_NONE };
   drm_ = drm;
   crtcs_ = crtcs;
   for (size_t crtc_idx = 0; crtc_idx < crtcs_.size(); crtc_idx++) {
     for (size_t i = 0; i < planes_per_crtc; i++) {
       std::unique_ptr<HardwareDisplayPlane> plane(
           new HardwareDisplayPlane(kPlaneBaseId + i, 1 << crtc_idx));
       plane->Initialize(drm, std::vector<uint32_t>(1, DRM_FORMAT_XRGB8888),
-                        std::vector<drm_format_modifier>(1, linear_modifier),
+                        std::vector<drm_format_modifier>(),  // modifiers
                         false, true);
       planes_.push_back(std::move(plane));
     }
   }
 
   // The real HDPM uses sorted planes, so sort them for consistency.
   std::sort(planes_.begin(), planes_.end(),
             [](const std::unique_ptr<HardwareDisplayPlane>& l,
                const std::unique_ptr<HardwareDisplayPlane>& r) {
               return l->plane_id() < r->plane_id();
@@ skipping 77 matching lines @@
 
 int MockHardwareDisplayPlaneManager::plane_count() const {
   return plane_count_;
 }
 
 void MockHardwareDisplayPlaneManager::ResetPlaneCount() {
   plane_count_ = 0;
 }
 
 }  // namespace ui