Revert of Copy GPU workaround flags from browser to GPU process

gpu/config/gpu_driver_bug_list.h

Index: gpu/config/gpu_driver_bug_list.h
diff --git a/gpu/config/gpu_driver_bug_list.h b/gpu/config/gpu_driver_bug_list.h
index 0ec839ed4eecafe17b2d88d140e0352b30e4c9ef..8db219fc5e11fded43ce6540bb4ce8ba528603c6 100644
--- a/gpu/config/gpu_driver_bug_list.h
+++ b/gpu/config/gpu_driver_bug_list.h
@@ -28,11 +28,6 @@
       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();