Disables software to accelerated canvas update on Linux AMD GPUs

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 150 matching lines @@
   // actually have RGBA format. The client is responsible for handling most of
   // the complexities associated with this. See
   // gpu/GLES2/extensions/CHROMIUM/CHROMIUM_image.txt for more
   // details.
   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;
+
   int major_version = 2;
   int minor_version = 0;
 };
 
 }  // namespace gpu
 
 #endif  // GPU_COMMAND_BUFFER_COMMON_CAPABILITIES_H_