gpu: Empty swaps for surfaceless output surfaces.

gpu/config/gpu_driver_bug_workaround_type.h

 // Copyright (c) 2013 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 GPU_CONFIG_GPU_DRIVER_BUG_WORKAROUND_TYPE_H_
 #define GPU_CONFIG_GPU_DRIVER_BUG_WORKAROUND_TYPE_H_
 
 #include <string>
 
 #include "gpu/gpu_export.h"
@@ skipping 193 matching lines @@
   GPU_OP(VALIDATE_MULTISAMPLE_BUFFER_ALLOCATION,             \
          validate_multisample_buffer_allocation)             \
   GPU_OP(WAKE_UP_GPU_BEFORE_DRAWING,                         \
          wake_up_gpu_before_drawing)                         \
   GPU_OP(USE_GPU_DRIVER_WORKAROUND_FOR_TESTING,              \
          use_gpu_driver_workaround_for_testing)              \
   GPU_OP(DISALLOW_LARGE_INSTANCED_DRAW,                      \
          disallow_large_instanced_draw)                      \
   GPU_OP(DISABLE_SOFTWARE_TO_ACCELERATED_CANVAS_UPGRADE,     \
          disable_software_to_accelerated_canvas_upgrade)     \
+  GPU_OP(DISABLE_NON_EMPTY_POST_SUB_BUFFERS_FOR_ONSCREEN_SURFACES, \
+         disable_non_empty_post_sub_buffers_for_onscreen_surfaces) \
 // clang-format on
 
 namespace gpu {
 
 // Provides all types of GPU driver bug workarounds.
 enum GpuDriverBugWorkaroundType {
 #define GPU_OP(type, name) type,
   GPU_DRIVER_BUG_WORKAROUNDS(GPU_OP)
 #undef GPU_OP
   NUMBER_OF_GPU_DRIVER_BUG_WORKAROUND_TYPES
 };
 
 GPU_EXPORT std::string GpuDriverBugWorkaroundTypeToString(
     GpuDriverBugWorkaroundType type);
 
 }  // namespace gpu
 
 #endif  // GPU_CONFIG_GPU_DRIVER_BUG_WORKAROUND_TYPE_H_