Set up content in-process main threads via factory

content/gpu/gpu_main_thread.cc

+// Copyright 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.
+
+#include "content/gpu/gpu_main_thread.h"
+
+#include "content/gpu/gpu_child_thread.h"
+#include "content/gpu/gpu_process.h"
+
+namespace content {
+
+GpuMainThread::GpuMainThread(const std::string& channel_id)
+    : base::Thread("Chrome_InProcGpuThread"),
+      channel_id_(channel_id),
+      gpu_process_(NULL) {
+}
+
+GpuMainThread::~GpuMainThread() {
+  Stop();
+}
+
+void GpuMainThread::Init() {
+  gpu_process_ = new GpuProcess();
+  // The process object takes ownership of the thread object, so do not
+  // save and delete the pointer.
+  gpu_process_->set_main_thread(new GpuChildThread(channel_id_));
+}
+
+void GpuMainThread::CleanUp() {
+  delete gpu_process_;
+}
+
+base::Thread* CreateGpuMainThread(const std::string& channel_id) {
+  return new GpuMainThread(channel_id);
+}
+
+}  // namespace content