text: // Copyright (c) 2012 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 "components/sync/base/get_session_name.h"
  
  #include "base/bind.h"
  #include "base/bind_helpers.h"
  #include "base/callback.h"
  #include "base/location.h"
  #include "base/strings/string_util.h"
  #include "base/sys_info.h"
  #include "base/task_runner.h"
  #include "base/task_runner_util.h"
  #include "base/threading/thread_restrictions.h"
  #include "build/build_config.h"
  
  #if defined(OS_CHROMEOS)
  #include "chromeos/system/devicetype.h"
  #elif defined(OS_LINUX)
  #include "components/sync/base/get_session_name_linux.h"
  #elif defined(OS_IOS)
  #include "components/sync/base/get_session_name_ios.h"
  #elif defined(OS_MACOSX)
  #include "components/sync/base/get_session_name_mac.h"
  #elif defined(OS_WIN)
  #include "components/sync/base/get_session_name_win.h"
  #elif defined(OS_ANDROID)
  #include "base/android/build_info.h"
  #endif
  
  namespace syncer {
  
  namespace {
  
  std::string GetSessionNameSynchronously() {
    base::ThreadRestrictions::AssertIOAllowed();
    std::string session_name;
  #if defined(OS_CHROMEOS)
    switch (chromeos::GetDeviceType()) {
      case chromeos::DeviceType::kChromebase:
        session_name = "Chromebase";
        break;
      case chromeos::DeviceType::kChromebit:
        session_name = "Chromebit";
        break;
      case chromeos::DeviceType::kChromebook:
        session_name = "Chromebook";
        break;
      case chromeos::DeviceType::kChromebox:
        session_name = "Chromebox";
        break;
      case chromeos::DeviceType::kUnknown:
        session_name = "Chromebook";
        break;
    }
  #elif defined(OS_LINUX)
    session_name = internal::GetHostname();
  #elif defined(OS_IOS)
    session_name = internal::GetComputerName();
  #elif defined(OS_MACOSX)
    session_name = internal::GetHardwareModelName();
  #elif defined(OS_WIN)
    session_name = internal::GetComputerName();
  #elif defined(OS_ANDROID)
    base::android::BuildInfo* android_build_info =
        base::android::BuildInfo::GetInstance();
    session_name = android_build_info->model();
  #endif
  
    if (session_name == "Unknown" || session_name.empty())
      session_name = base::SysInfo::OperatingSystemName();
  
    DCHECK(base::IsStringUTF8(session_name));
    return session_name;
  }
  
  }  // namespace
  
  void GetSessionName(
      const scoped_refptr<base::TaskRunner>& task_runner,
      const base::Callback<void(const std::string&)>& done_callback) {
    base::PostTaskAndReplyWithResult(task_runner.get(), FROM_HERE,
                                     base::Bind(&GetSessionNameSynchronously),
                                     done_callback);
  }
  
  std::string GetSessionNameSynchronouslyForTesting() {
    return GetSessionNameSynchronously();
  }
  
  }  // namespace syncer
  