Load the GL_KHR_debug entry points and log messages they produce.

gpu/command_buffer/service/gpu_preferences.h

 // Copyright 2016 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_SERVICE_GPU_PREFERENCES_H_
 #define GPU_COMMAND_BUFFER_SERVICE_GPU_PREFERENCES_H_
 
 #include <stddef.h>
 
 #include "base/macros.h"
@@ skipping 77 matching lines @@
 
   // Turn on Logging GPU commands.
   bool enable_gpu_command_logging = false;
 
   // Turn on Calling GL Error after every command.
   bool enable_gpu_debugging = false;
 
   // Enable GPU service logging.
   bool enable_gpu_service_logging_gpu = false;
 
+  // Enable logging of GPU driver debug messages.
+  bool enable_gpu_driver_debug_logging = false;
+
   // Turn off gpu program caching
   bool disable_gpu_program_cache = false;
 
   // Enforce GL minimums.
   bool enforce_gl_minimums = false;
 
   // Sets the total amount of memory that may be allocated for GPU resources
   uint32_t force_gpu_mem_available = 0;
 
   // Sets the maximum size of the in-memory gpu program cache, in kb
@@ skipping 27 matching lines @@
   bool enable_unsafe_es3_apis = true;
 
   // Use the Pass-through command decoder, skipping all validation and state
   // tracking.
   bool use_passthrough_cmd_decoder = false;
 };
 
 }  // namespace gpu
 
 #endif // GPU_COMMAND_BUFFER_SERVICE_GPU_PREFERENCES_H_