Revert of gpu: Use ANDROID_native_fence_sync instead of ARM_implicit_external_sync.

gpu/command_buffer/common/capabilities.h

 // Copyright 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_COMMAND_BUFFER_COMMON_CAPABILITIES_H_
 #define GPU_COMMAND_BUFFER_COMMON_CAPABILITIES_H_
 
 #include <stdint.h>
 
 #include "gpu/gpu_export.h"
@@ skipping 156 matching lines @@
   bool chromium_image_rgb_emulation = false;
 
   // When true, RGB framebuffer formats are unsupported. Emulate with RGBA to
   // work around this. See https://crbug.com/449150 for an example.
   bool emulate_rgb_buffer_with_rgba = false;
 
   // When true, is safe to convert a canvas from software to accelerated.
   // See https://crbug.com/710029.
   bool software_to_accelerated_canvas_upgrade = true;
 
+  // When true, non-empty post sub buffer calls are unsupported.
+  bool disable_non_empty_post_sub_buffers = false;
+
   int major_version = 2;
   int minor_version = 0;
 };
 
 }  // namespace gpu
 
 #endif  // GPU_COMMAND_BUFFER_COMMON_CAPABILITIES_H_