Revert of Refactor context creation parameters into a struct.

gpu/command_buffer/service/service_utils.cc

-// Copyright (c) 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.
-
-#include "gpu/command_buffer/service/service_utils.h"
-
-#include "gpu/command_buffer/common/gles2_cmd_utils.h"
-#include "gpu/command_buffer/service/gpu_preferences.h"
-
-namespace gpu {
-namespace gles2 {
-
-gl::GLContextAttribs GenerateGLContextAttribs(
-    const ContextCreationAttribHelper& attribs_helper,
-    const GpuPreferences& gpu_preferences) {
-  gl::GLContextAttribs attribs;
-  attribs.gpu_preference = attribs_helper.gpu_preference;
-  if (gpu_preferences.use_passthrough_cmd_decoder) {
-    attribs.bind_generates_resource = attribs_helper.bind_generates_resource;
-    attribs.webgl_compatibility_context =
-        IsWebGLContextType(attribs_helper.context_type);
-  }
-  return attribs;
-}
-
-}  // namespace gles2
-}  // namespace gpu