[Sync] Simplify GetSessionName interface

chrome/browser/sync/util/get_session_name_task.cc

-// Copyright (c) 2011 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 "chrome/browser/sync/util/get_session_name_task.h"
-
-#include "base/bind.h"
-#include "base/location.h"
-#include "base/message_loop_proxy.h"
-#include "base/sys_info.h"
-
-#if defined(OS_LINUX)
-#include "base/linux_util.h"
-#elif defined(OS_WIN)
-#include <windows.h>
-#endif
-
-namespace browser_sync {
-
-GetSessionNameTask::GetSessionNameTask(
-    const GetSessionNameTask::OnSessionNameInitialized& callback)
-    : callback_(callback),
-      thread_(base::MessageLoopProxy::current()) {
-}
-
-GetSessionNameTask::~GetSessionNameTask() {}
-
-void GetSessionNameTask::GetSessionNameAsync() {
-#if defined(OS_CHROMEOS)
-  std::string session_name = "Chromebook";
-#elif defined(OS_LINUX)
-  std::string session_name = base::GetLinuxDistro();
-#elif defined(OS_MACOSX)
-  std::string session_name = GetSessionNameTask::GetHardwareModelName();
-#elif defined(OS_WIN)
-  std::string session_name = GetSessionNameTask::GetComputerName();
-#else
-  std::string session_name;
-#endif
-
-  if (session_name == "Unknown" || session_name.empty())
-    session_name = base::SysInfo::OperatingSystemName();
-
-  thread_->PostTask(FROM_HERE,
-                    base::Bind(&GetSessionNameTask::InvokeCallback,
-                               this,
-                               session_name));
-}
-
-void GetSessionNameTask::InvokeCallback(const std::string& session_name) {
-  callback_.Run(session_name);
-}
-
-#if defined(OS_WIN)
-// static
-std::string GetSessionNameTask::GetComputerName() {
-  char computer_name[MAX_COMPUTERNAME_LENGTH + 1];
-  DWORD size = sizeof(computer_name);
-  if (GetComputerNameA(computer_name, &size))
-    return computer_name;
-  return std::string();
-}
-#endif
-
-}  // namespace browser_sync