Revert of services/ui: Use new gpu::GpuInit to do the GPU initialization.

services/ui/gpu/gpu_main.cc

-// 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.
-
-#include "services/ui/gpu/gpu_main.h"
-
-#include "base/command_line.h"
-#include "gpu/ipc/common/gpu_memory_buffer_support.h"
-#include "gpu/ipc/service/gpu_memory_buffer_factory.h"
-#include "gpu/ipc/service/gpu_watchdog_thread.h"
-#include "services/ui/gpu/gpu_service_internal.h"
-
-namespace ui {
-
-GpuMain::GpuMain() {
-  gpu_init_.set_sandbox_helper(this);
-  bool success = gpu_init_.InitializeAndStartSandbox(
-      *base::CommandLine::ForCurrentProcess());
-  if (success) {
-    if (gpu::GetNativeGpuMemoryBufferType() != gfx::EMPTY_BUFFER) {
-      gpu_memory_buffer_factory_ =
-          gpu::GpuMemoryBufferFactory::CreateNativeType();
-    }
-    gpu_service_internal_.reset(new GpuServiceInternal(
-        gpu_init_.gpu_info(), gpu_init_.watchdog_thread(),
-        gpu_memory_buffer_factory_.get()));
-  }
-}
-
-GpuMain::~GpuMain() {
-  gpu_init_.watchdog_thread()->Stop();
-}
-
-void GpuMain::Add(mojom::GpuServiceInternalRequest request) {
-  if (gpu_service_internal_)
-    gpu_service_internal_->Add(std::move(request));
-}
-
-void GpuMain::PreSandboxStartup() {
-  // TODO(sad): https://crbug.com/645602
-}
-
-bool GpuMain::EnsureSandboxInitialized() {
-  // TODO(sad): https://crbug.com/645602
-  return true;
-}
-
-}  // namespace ui