text: // 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/installer/util/helper.h"
  
  #include "base/logging.h"
  #include "base/file_path.h"
  #include "base/path_service.h"
  #include "chrome/installer/util/browser_distribution.h"
  #include "chrome/installer/util/installation_state.h"
  #include "chrome/installer/util/install_util.h"
  #include "chrome/installer/util/util_constants.h"
  
  namespace {
  
  FilePath GetChromeInstallBasePath(bool system,
                                    BrowserDistribution* distribution,
                                    const wchar_t* sub_path) {
    FilePath install_path;
    if (system) {
      PathService::Get(base::DIR_PROGRAM_FILES, &install_path);
    } else {
      PathService::Get(base::DIR_LOCAL_APP_DATA, &install_path);
    }
  
    if (!install_path.empty()) {
      install_path = install_path.Append(distribution->GetInstallSubDir());
      install_path = install_path.Append(sub_path);
    }
  
    return install_path;
  }
  
  }  // namespace
  
  namespace installer {
  
  FilePath GetChromeInstallPath(bool system_install, BrowserDistribution* dist) {
    return GetChromeInstallBasePath(system_install, dist, kInstallBinaryDir);
  }
  
  FilePath GetChromeUserDataPath(BrowserDistribution* dist) {
    return GetChromeInstallBasePath(false, dist, kInstallUserDataDir);
  }
  
  BrowserDistribution* GetBinariesDistribution(bool system_install) {
    BrowserDistribution* dist = BrowserDistribution::GetDistribution();
    ProductState state;
  
    // If we're part of a multi-install, we need to poll using the multi-installer
    // package's app guid rather than the browser's or Chrome Frame's app guid.
    // If we can't read the app's state from the registry, assume it isn't
    // multi-installed.
    if (state.Initialize(system_install, dist) && state.is_multi_install()) {
      return BrowserDistribution::GetSpecificDistribution(
          BrowserDistribution::CHROME_BINARIES);
    } else {
      return dist;
    }
  }
  
  std::wstring GetAppGuidForUpdates(bool system_install) {
    return GetBinariesDistribution(system_install)->GetAppGuid();
  }
  
  }  // namespace installer.
  