Revert of Copy GPU workaround flags from browser to GPU process

gpu/config/gpu_driver_bug_list.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_LIST_H_
 #define GPU_CONFIG_GPU_DRIVER_BUG_LIST_H_
 
 #include <set>
 #include <string>
 
@@ skipping 10 matching lines @@
   ~GpuDriverBugList() override;
 
   static GpuDriverBugList* Create();
 
   // Append |workarounds| with these passed in through the
   // |command_line|.
   static void AppendWorkaroundsFromCommandLine(
       std::set<int>* workarounds,
       const base::CommandLine& command_line);
 
-  // Append |workarounds| with the full list of workarounds.
-  // This is needed for correctly passing flags down from
-  // the browser process to the GPU process.
-  static void AppendAllWorkarounds(std::vector<const char*>* workarounds);
-
  private:
   GpuDriverBugList();
 
   DISALLOW_COPY_AND_ASSIGN(GpuDriverBugList);
 };
 
 }  // namespace gpu
 
 #endif  // GPU_CONFIG_GPU_DRIVER_BUG_LIST_H_