Ask driver for driver specific extension

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"
 
 #define GPU_DRIVER_BUG_WORKAROUNDS(GPU_OP)                   \
   GPU_OP(CLEAR_ALPHA_IN_READPIXELS,                          \
          clear_alpha_in_readpixels)                          \
   GPU_OP(CLEAR_UNIFORMS_BEFORE_FIRST_PROGRAM_USE,            \
          clear_uniforms_before_first_program_use)            \
   GPU_OP(COUNT_ALL_IN_VARYINGS_PACKING,                      \
          count_all_in_varyings_packing)                      \
   GPU_OP(DISABLE_ANGLE_INSTANCED_ARRAYS,                     \
          disable_angle_instanced_arrays)                     \
   GPU_OP(DISABLE_ASYNC_READPIXELS,                           \
          disable_async_readpixels)                           \
   GPU_OP(DISABLE_D3D11,                                      \
          disable_d3d11)                                      \
   GPU_OP(DISABLE_DEPTH_TEXTURE,                              \
          disable_depth_texture)                              \
+  GPU_OP(DISABLE_EGL_KHR_FENCE_SYNC,                         \
+         disable_egl_khr_fence_sync)                         \
   GPU_OP(DISABLE_EXT_DISCARD_FRAMEBUFFER,                    \
          disable_ext_discard_framebuffer)                    \
   GPU_OP(DISABLE_EXT_DRAW_BUFFERS,                           \
          disable_ext_draw_buffers)                           \
   GPU_OP(DISABLE_EXT_OCCLUSION_QUERY,                        \
          disable_ext_occlusion_query)                        \
   GPU_OP(DISABLE_MULTIMONITOR_MULTISAMPLING,                 \
          disable_multimonitor_multisampling)                 \
   GPU_OP(DISABLE_MULTISAMPLING,                              \
          disable_multisampling)                              \
@@ skipping 77 matching lines @@
 #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_