chrome/browser/chrome_browser_main_win.cc

   1 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
   2 // Use of this source code is governed by a BSD-style license that can be
   3 // found in the LICENSE file.
   4
   5 #include "chrome/browser/chrome_browser_main_win.h"
   6
   7 #include <windows.h>
   8 #include <shellapi.h>
   9
  10 #include <algorithm>
  11
  12 #include "base/command_line.h"
  13 #include "base/environment.h"
  14 #include "base/files/file_enumerator.h"
  15 #include "base/files/file_path.h"
  16 #include "base/files/file_util.h"
  17 #include "base/i18n/rtl.h"
  18 #include "base/location.h"
  19 #include "base/macros.h"
  20 #include "base/memory/scoped_ptr.h"
  21 #include "base/metrics/histogram.h"
  22 #include "base/path_service.h"
  23 #include "base/scoped_native_library.h"
  24 #include "base/strings/string_number_conversions.h"
  25 #include "base/strings/utf_string_conversions.h"
  26 #include "base/win/metro.h"
  27 #include "base/win/registry.h"
  28 #include "base/win/win_util.h"
  29 #include "base/win/windows_version.h"
  30 #include "base/win/wrapped_window_proc.h"
  31 #include "chrome/browser/browser_util_win.h"
  32 #include "chrome/browser/chrome_elf_init_win.h"
  33 #include "chrome/browser/first_run/first_run.h"
  34 #include "chrome/browser/install_verification/win/install_verification.h"
  35 #include "chrome/browser/profiles/profile_info_cache.h"
  36 #include "chrome/browser/profiles/profile_shortcut_manager.h"
  37 #include "chrome/browser/shell_integration.h"
  38 #include "chrome/browser/ui/simple_message_box.h"
  39 #include "chrome/browser/ui/uninstall_browser_prompt.h"
  40 #include "chrome/chrome_watcher/chrome_watcher_main_api.h"
  41 #include "chrome/common/chrome_constants.h"
  42 #include "chrome/common/chrome_paths.h"
  43 #include "chrome/common/chrome_result_codes.h"
  44 #include "chrome/common/chrome_switches.h"
  45 #include "chrome/common/chrome_utility_messages.h"
  46 #include "chrome/common/chrome_version_info.h"
  47 #include "chrome/common/env_vars.h"
  48 #include "chrome/grit/chromium_strings.h"
  49 #include "chrome/grit/generated_resources.h"
  50 #include "chrome/installer/util/browser_distribution.h"
  51 #include "chrome/installer/util/helper.h"
  52 #include "chrome/installer/util/install_util.h"
  53 #include "chrome/installer/util/installer_util_strings.h"
  54 #include "chrome/installer/util/l10n_string_util.h"
  55 #include "chrome/installer/util/shell_util.h"
  56 #include "components/variations/variations_associated_data.h"
  57 #include "content/public/browser/browser_thread.h"
  58 #include "content/public/browser/utility_process_host.h"
  59 #include "content/public/browser/utility_process_host_client.h"
  60 #include "content/public/common/content_switches.h"
  61 #include "content/public/common/dwrite_font_platform_win.h"
  62 #include "content/public/common/main_function_params.h"
  63 #include "ui/base/cursor/cursor_loader_win.h"
  64 #include "ui/base/l10n/l10n_util.h"
  65 #include "ui/base/l10n/l10n_util_win.h"
  66 #include "ui/base/ui_base_switches.h"
  67 #include "ui/base/win/message_box_win.h"
  68 #include "ui/gfx/platform_font_win.h"
  69 #include "ui/gfx/switches.h"
  70 #include "ui/gfx/win/direct_write.h"
  71 #include "ui/strings/grit/app_locale_settings.h"
  72
  73 #if defined(GOOGLE_CHROME_BUILD)
  74 #include "chrome/browser/google/did_run_updater_win.h"
  75 #endif
  76
  77 #if defined(KASKO)
  78 #include "syzygy/kasko/api/reporter.h"
  79 #endif
  80
  81 namespace {
  82
  83 typedef HRESULT (STDAPICALLTYPE* RegisterApplicationRestartProc)(
  84     const wchar_t* command_line,
  85     DWORD flags);
  86
  87 void InitializeWindowProcExceptions() {
  88   // Get the breakpad pointer from chrome.exe
  89   base::win::WinProcExceptionFilter exception_filter =
  90       reinterpret_cast<base::win::WinProcExceptionFilter>(
  91           ::GetProcAddress(::GetModuleHandle(
  92                                chrome::kBrowserProcessExecutableName),
  93                            "CrashForException"));
  94   exception_filter = base::win::SetWinProcExceptionFilter(exception_filter);
  95   DCHECK(!exception_filter);
  96 }
  97
  98 // gfx::Font callbacks
  99 void AdjustUIFont(LOGFONT* logfont) {
 100   l10n_util::AdjustUIFont(logfont);
 101 }
 102
 103 int GetMinimumFontSize() {
 104   int min_font_size;
 105   base::StringToInt(l10n_util::GetStringUTF16(IDS_MINIMUM_UI_FONT_SIZE),
 106                     &min_font_size);
 107   return min_font_size;
 108 }
 109
 110 class TranslationDelegate : public installer::TranslationDelegate {
 111  public:
 112   base::string16 GetLocalizedString(int installer_string_id) override;
 113 };
 114
 115 void ExecuteFontCacheBuildTask(const base::FilePath& path) {
 116   base::WeakPtr<content::UtilityProcessHost> utility_process_host(
 117       content::UtilityProcessHost::Create(NULL, NULL)->AsWeakPtr());
 118   utility_process_host->SetName(l10n_util::GetStringUTF16(
 119       IDS_UTILITY_PROCESS_FONT_CACHE_BUILDER_NAME));
 120   utility_process_host->DisableSandbox();
 121   utility_process_host->Send(
 122       new ChromeUtilityHostMsg_BuildDirectWriteFontCache(path));
 123 }
 124
 125 #if defined(KASKO)
 126 void ObserveFailedCrashReportDirectory(const base::FilePath& path, bool error) {
 127   DCHECK(!error);
 128   if (error)
 129     return;
 130   base::FileEnumerator enumerator(path, true, base::FileEnumerator::FILES);
 131   for (base::FilePath report_file = enumerator.Next(); !report_file.empty();
 132        report_file = enumerator.Next()) {
 133     if (report_file.Extension() ==
 134         kasko::api::kPermanentFailureMinidumpExtension) {
 135       UMA_HISTOGRAM_BOOLEAN("CrashReport.PermanentUploadFailure", true);
 136     }
 137     bool result = base::DeleteFile(report_file, false);
 138     DCHECK(result);
 139   }
 140 }
 141
 142 void StartFailedKaskoCrashReportWatcher(base::FilePathWatcher* watcher) {
 143   base::FilePath watcher_data_directory;
 144   if (!PathService::Get(chrome::DIR_WATCHER_DATA, &watcher_data_directory)) {
 145     NOTREACHED();
 146   } else {
 147     base::FilePath permanent_failure_directory =
 148         watcher_data_directory.Append(kPermanentlyFailedReportsSubdir);
 149     if (!watcher->Watch(permanent_failure_directory, true,
 150                         base::Bind(&ObserveFailedCrashReportDirectory))) {
 151       NOTREACHED();
 152     }
 153
 154     // Call it once to observe any files present prior to the Watch() call.
 155     ObserveFailedCrashReportDirectory(permanent_failure_directory, false);
 156   }
 157 }
 158 #endif
 159
 160 void DetectFaultTolerantHeap() {
 161   enum FTHFlags {
 162     FTH_HKLM = 1,
 163     FTH_HKCU = 2,
 164     FTH_ACLAYERS_LOADED = 4,
 165     FTH_ACXTRNAL_LOADED = 8,
 166     FTH_FLAGS_COUNT = 16
 167   };
 168
 169   // The Fault Tolerant Heap (FTH) is enabled on some customer machines and is
 170   // affecting their performance. We need to know how many machines are
 171   // affected in order to decide what to do.
 172
 173   // The main way that the FTH is enabled is by having a value set in
 174   // HKLM\Software\Microsoft\Windows NT\CurrentVersion\AppCompatFlags\Layers
 175   // whose name is the full path to the executable and whose data is the
 176   // string FaultTolerantHeap. Some documents suggest that this data may also
 177   // be found in HKCU. There have also been cases observed where this registry
 178   // key is set but the FTH is not enabled, so we also look for AcXtrnal.dll
 179   // and AcLayers.dll which are used to implement the FTH on Windows 7 and 8
 180   // respectively.
 181
 182   // Get the module path so that we can look for it in the registry.
 183   wchar_t module_path[MAX_PATH];
 184   GetModuleFileName(NULL, module_path, ARRAYSIZE(module_path));
 185   // Force null-termination, necessary on Windows XP.
 186   module_path[ARRAYSIZE(module_path)-1] = 0;
 187
 188   const wchar_t* const kRegPath = L"Software\\Microsoft\\Windows NT\\"
 189         L"CurrentVersion\\AppCompatFlags\\Layers";
 190   const wchar_t* const kFTHData = L"FaultTolerantHeap";
 191   // We always want to read from the 64-bit version of the registry if present,
 192   // since that is what the OS looks at, even for 32-bit processes.
 193   const DWORD kRegFlags = KEY_READ | KEY_WOW64_64KEY;
 194
 195   base::win::RegKey FTH_HKLM_reg(HKEY_LOCAL_MACHINE, kRegPath, kRegFlags);
 196   FTHFlags detected = FTHFlags();
 197   base::string16 chrome_app_compat;
 198   if (FTH_HKLM_reg.ReadValue(module_path, &chrome_app_compat) == 0) {
 199     // This *usually* indicates that the fault tolerant heap is enabled.
 200     if (wcsicmp(chrome_app_compat.c_str(), kFTHData) == 0)
 201       detected = static_cast<FTHFlags>(detected | FTH_HKLM);
 202   }
 203
 204   base::win::RegKey FTH_HKCU_reg(HKEY_CURRENT_USER, kRegPath, kRegFlags);
 205   if (FTH_HKCU_reg.ReadValue(module_path, &chrome_app_compat) == 0) {
 206     if (wcsicmp(chrome_app_compat.c_str(), kFTHData) == 0)
 207       detected = static_cast<FTHFlags>(detected | FTH_HKCU);
 208   }
 209
 210   // Look for the DLLs used to implement the FTH and other compat hacks.
 211   if (GetModuleHandleW(L"AcLayers.dll") != NULL)
 212     detected = static_cast<FTHFlags>(detected | FTH_ACLAYERS_LOADED);
 213   if (GetModuleHandleW(L"AcXtrnal.dll") != NULL)
 214     detected = static_cast<FTHFlags>(detected | FTH_ACXTRNAL_LOADED);
 215
 216   UMA_HISTOGRAM_ENUMERATION("FaultTolerantHeap", detected, FTH_FLAGS_COUNT);
 217 }
 218
 219 }  // namespace
 220
 221 void ShowCloseBrowserFirstMessageBox() {
 222   int message_id = IDS_UNINSTALL_CLOSE_APP;
 223   if (base::win::GetVersion() >= base::win::VERSION_WIN8 &&
 224       (ShellIntegration::GetDefaultBrowser() == ShellIntegration::IS_DEFAULT)) {
 225     message_id = IDS_UNINSTALL_CLOSE_APP_IMMERSIVE;
 226   }
 227   chrome::ShowMessageBox(NULL,
 228                          l10n_util::GetStringUTF16(IDS_PRODUCT_NAME),
 229                          l10n_util::GetStringUTF16(message_id),
 230                          chrome::MESSAGE_BOX_TYPE_WARNING);
 231 }
 232
 233 int DoUninstallTasks(bool chrome_still_running) {
 234   // We want to show a warning to user (and exit) if Chrome is already running
 235   // *before* we show the uninstall confirmation dialog box. But while the
 236   // uninstall confirmation dialog is up, user might start Chrome, so we
 237   // check once again after user acknowledges Uninstall dialog.
 238   if (chrome_still_running) {
 239     ShowCloseBrowserFirstMessageBox();
 240     return chrome::RESULT_CODE_UNINSTALL_CHROME_ALIVE;
 241   }
 242   int result = chrome::ShowUninstallBrowserPrompt();
 243   if (browser_util::IsBrowserAlreadyRunning()) {
 244     ShowCloseBrowserFirstMessageBox();
 245     return chrome::RESULT_CODE_UNINSTALL_CHROME_ALIVE;
 246   }
 247
 248   if (result != chrome::RESULT_CODE_UNINSTALL_USER_CANCEL) {
 249     // The following actions are just best effort.
 250     // TODO(gab): Look into removing this code which is now redundant with the
 251     // work done by setup.exe on uninstall.
 252     VLOG(1) << "Executing uninstall actions";
 253     base::FilePath chrome_exe;
 254     if (PathService::Get(base::FILE_EXE, &chrome_exe)) {
 255       ShellUtil::ShortcutLocation user_shortcut_locations[] = {
 256         ShellUtil::SHORTCUT_LOCATION_DESKTOP,
 257         ShellUtil::SHORTCUT_LOCATION_QUICK_LAUNCH,
 258         ShellUtil::SHORTCUT_LOCATION_START_MENU_CHROME_DIR,
 259         ShellUtil::SHORTCUT_LOCATION_START_MENU_CHROME_APPS_DIR,
 260       };
 261       BrowserDistribution* dist = BrowserDistribution::GetDistribution();
 262       for (size_t i = 0; i < arraysize(user_shortcut_locations); ++i) {
 263         if (!ShellUtil::RemoveShortcuts(user_shortcut_locations[i], dist,
 264                 ShellUtil::CURRENT_USER, chrome_exe)) {
 265           VLOG(1) << "Failed to delete shortcut at location "
 266                   << user_shortcut_locations[i];
 267         }
 268       }
 269     } else {
 270       NOTREACHED();
 271     }
 272   }
 273   return result;
 274 }
 275
 276 // ChromeBrowserMainPartsWin ---------------------------------------------------
 277
 278 ChromeBrowserMainPartsWin::ChromeBrowserMainPartsWin(
 279     const content::MainFunctionParams& parameters)
 280     : ChromeBrowserMainParts(parameters) {
 281   if (base::win::IsMetroProcess()) {
 282     typedef const wchar_t* (*GetMetroSwitches)(void);
 283     GetMetroSwitches metro_switches_proc = reinterpret_cast<GetMetroSwitches>(
 284         GetProcAddress(base::win::GetMetroModule(),
 285                        "GetMetroCommandLineSwitches"));
 286     if (metro_switches_proc) {
 287       base::string16 metro_switches = (*metro_switches_proc)();
 288       if (!metro_switches.empty()) {
 289         base::CommandLine extra_switches(base::CommandLine::NO_PROGRAM);
 290         extra_switches.ParseFromString(metro_switches);
 291         base::CommandLine::ForCurrentProcess()->AppendArguments(extra_switches,
 292                                                                 false);
 293       }
 294     }
 295   }
 296 }
 297
 298 ChromeBrowserMainPartsWin::~ChromeBrowserMainPartsWin() {
 299 }
 300
 301 void ChromeBrowserMainPartsWin::ToolkitInitialized() {
 302   ChromeBrowserMainParts::ToolkitInitialized();
 303   gfx::PlatformFontWin::adjust_font_callback = &AdjustUIFont;
 304   gfx::PlatformFontWin::get_minimum_font_size_callback = &GetMinimumFontSize;
 305   ui::CursorLoaderWin::SetCursorResourceModule(chrome::kBrowserResourcesDll);
 306 }
 307
 308 void ChromeBrowserMainPartsWin::PreMainMessageLoopStart() {
 309   // installer_util references strings that are normally compiled into
 310   // setup.exe.  In Chrome, these strings are in the locale files.
 311   SetupInstallerUtilStrings();
 312
 313   ChromeBrowserMainParts::PreMainMessageLoopStart();
 314   if (!parameters().ui_task) {
 315     // Make sure that we know how to handle exceptions from the message loop.
 316     InitializeWindowProcExceptions();
 317   }
 318 }
 319
 320 int ChromeBrowserMainPartsWin::PreCreateThreads() {
 321   int rv = ChromeBrowserMainParts::PreCreateThreads();
 322
 323   // TODO(viettrungluu): why don't we run this earlier?
 324   if (!parsed_command_line().HasSwitch(switches::kNoErrorDialogs) &&
 325       base::win::GetVersion() < base::win::VERSION_XP) {
 326     chrome::ShowMessageBox(NULL,
 327         l10n_util::GetStringUTF16(IDS_PRODUCT_NAME),
 328         l10n_util::GetStringUTF16(IDS_UNSUPPORTED_OS_PRE_WIN_XP),
 329         chrome::MESSAGE_BOX_TYPE_WARNING);
 330   }
 331
 332   return rv;
 333 }
 334
 335 void ChromeBrowserMainPartsWin::ShowMissingLocaleMessageBox() {
 336   ui::MessageBox(NULL,
 337                  base::ASCIIToUTF16(chrome_browser::kMissingLocaleDataMessage),
 338                  base::ASCIIToUTF16(chrome_browser::kMissingLocaleDataTitle),
 339                  MB_OK | MB_ICONERROR | MB_TOPMOST);
 340 }
 341
 342 void ChromeBrowserMainPartsWin::PostProfileInit() {
 343   ChromeBrowserMainParts::PostProfileInit();
 344
 345   // DirectWrite support is mainly available Windows 7 and up.
 346   if (gfx::win::ShouldUseDirectWrite()) {
 347     base::FilePath path(
 348       profile()->GetPath().AppendASCII(content::kFontCacheSharedSectionName));
 349     // This function will create a read only section if cache file exists
 350     // otherwise it will spawn utility process to build cache file, which will
 351     // be used during next browser start/postprofileinit.
 352     if (!variations::GetVariationParamValue("LightSpeed",
 353           "DisableDWriteFontCache").empty() || !content::LoadFontCache(path)) {
 354       // We delay building of font cache until first startup page loads.
 355       // During first renderer start there are lot of things happening
 356       // simultaneously some of them are:
 357       // - Renderer is going through all font files on the system to create
 358       //   a font collection.
 359       // - Renderer loading up startup URL, accessing HTML/JS File cache,
 360       //   net activity etc.
 361       // - Extension initialization.
 362       // We delay building of cache mainly to avoid parallel font file
 363       // loading along with Renderer. Some systems have significant number of
 364       // font files which takes long time to process.
 365       // Related information is at http://crbug.com/436195.
 366       const int kBuildFontCacheDelaySec = 30;
 367       content::BrowserThread::PostDelayedTask(
 368           content::BrowserThread::IO,
 369           FROM_HERE,
 370           base::Bind(ExecuteFontCacheBuildTask, path),
 371           base::TimeDelta::FromSeconds(kBuildFontCacheDelaySec));
 372     }
 373   }
 374 }
 375
 376 void ChromeBrowserMainPartsWin::PostBrowserStart() {
 377   ChromeBrowserMainParts::PostBrowserStart();
 378
 379   UMA_HISTOGRAM_BOOLEAN("Windows.Tablet", base::win::IsTabletDevice());
 380
 381   // Set up a task to verify installed modules in the current process.
 382   content::BrowserThread::PostAfterStartupTask(
 383       FROM_HERE, content::BrowserThread::GetBlockingPool(),
 384       base::Bind(&VerifyInstallation));
 385
 386   InitializeChromeElf();
 387
 388 #if defined(KASKO)
 389   content::BrowserThread::PostDelayedTask(
 390       content::BrowserThread::FILE, FROM_HERE,
 391       base::Bind(&StartFailedKaskoCrashReportWatcher,
 392                  base::Unretained(&failed_kasko_crash_report_watcher_)),
 393       base::TimeDelta::FromMinutes(5));
 394 #endif
 395
 396 #if defined(GOOGLE_CHROME_BUILD)
 397   did_run_updater_.reset(new DidRunUpdater);
 398 #endif
 399
 400   // Record UMA data about whether the fault-tolerant heap is enabled.
 401   // Use a delayed task to minimize the impact on startup time.
 402   content::BrowserThread::PostDelayedTask(
 403       content::BrowserThread::UI,
 404       FROM_HERE,
 405       base::Bind(&DetectFaultTolerantHeap),
 406       base::TimeDelta::FromMinutes(1));
 407 }
 408
 409 // static
 410 void ChromeBrowserMainPartsWin::PrepareRestartOnCrashEnviroment(
 411     const base::CommandLine& parsed_command_line) {
 412   // Clear this var so child processes don't show the dialog by default.
 413   scoped_ptr<base::Environment> env(base::Environment::Create());
 414   env->UnSetVar(env_vars::kShowRestart);
 415
 416   // For non-interactive tests we don't restart on crash.
 417   if (env->HasVar(env_vars::kHeadless))
 418     return;
 419
 420   // If the known command-line test options are used we don't create the
 421   // environment block which means we don't get the restart dialog.
 422   if (parsed_command_line.HasSwitch(switches::kBrowserCrashTest) ||
 423       parsed_command_line.HasSwitch(switches::kNoErrorDialogs))
 424     return;
 425
 426   // The encoding we use for the info is "title|context|direction" where
 427   // direction is either env_vars::kRtlLocale or env_vars::kLtrLocale depending
 428   // on the current locale.
 429   base::string16 dlg_strings(
 430       l10n_util::GetStringUTF16(IDS_CRASH_RECOVERY_TITLE));
 431   dlg_strings.push_back('|');
 432   base::string16 adjusted_string(
 433       l10n_util::GetStringUTF16(IDS_CRASH_RECOVERY_CONTENT));
 434   base::i18n::AdjustStringForLocaleDirection(&adjusted_string);
 435   dlg_strings.append(adjusted_string);
 436   dlg_strings.push_back('|');
 437   dlg_strings.append(base::ASCIIToUTF16(
 438       base::i18n::IsRTL() ? env_vars::kRtlLocale : env_vars::kLtrLocale));
 439
 440   env->SetVar(env_vars::kRestartInfo, base::UTF16ToUTF8(dlg_strings));
 441 }
 442
 443 // static
 444 void ChromeBrowserMainPartsWin::RegisterApplicationRestart(
 445     const base::CommandLine& parsed_command_line) {
 446   DCHECK(base::win::GetVersion() >= base::win::VERSION_VISTA);
 447   base::ScopedNativeLibrary library(base::FilePath(L"kernel32.dll"));
 448   // Get the function pointer for RegisterApplicationRestart.
 449   RegisterApplicationRestartProc register_application_restart =
 450       reinterpret_cast<RegisterApplicationRestartProc>(
 451           library.GetFunctionPointer("RegisterApplicationRestart"));
 452   if (!register_application_restart) {
 453     LOG(WARNING) << "Cannot find RegisterApplicationRestart in kernel32.dll";
 454     return;
 455   }
 456   // The Windows Restart Manager expects a string of command line flags only,
 457   // without the program.
 458   base::CommandLine command_line(base::CommandLine::NO_PROGRAM);
 459   command_line.AppendArguments(parsed_command_line, false);
 460   if (!command_line.HasSwitch(switches::kRestoreLastSession))
 461     command_line.AppendSwitch(switches::kRestoreLastSession);
 462
 463   // Restart Chrome if the computer is restarted as the result of an update.
 464   // This could be extended to handle crashes, hangs, and patches.
 465   HRESULT hr = register_application_restart(
 466       command_line.GetCommandLineString().c_str(),
 467       RESTART_NO_CRASH | RESTART_NO_HANG | RESTART_NO_PATCH);
 468   if (FAILED(hr)) {
 469     if (hr == E_INVALIDARG) {
 470       LOG(WARNING) << "Command line too long for RegisterApplicationRestart";
 471     } else {
 472       NOTREACHED() << "RegisterApplicationRestart failed. hr: " << hr <<
 473                       ", command_line: " << command_line.GetCommandLineString();
 474     }
 475   }
 476 }
 477
 478 // static
 479 int ChromeBrowserMainPartsWin::HandleIconsCommands(
 480     const base::CommandLine& parsed_command_line) {
 481   if (parsed_command_line.HasSwitch(switches::kHideIcons)) {
 482     base::string16 cp_applet;
 483     base::win::Version version = base::win::GetVersion();
 484     if (version >= base::win::VERSION_VISTA) {
 485       cp_applet.assign(L"Programs and Features");  // Windows Vista and later.
 486     } else if (version >= base::win::VERSION_XP) {
 487       cp_applet.assign(L"Add/Remove Programs");  // Windows XP.
 488     } else {
 489       return chrome::RESULT_CODE_UNSUPPORTED_PARAM;  // Not supported
 490     }
 491
 492     const base::string16 msg =
 493         l10n_util::GetStringFUTF16(IDS_HIDE_ICONS_NOT_SUPPORTED, cp_applet);
 494     const base::string16 caption = l10n_util::GetStringUTF16(IDS_PRODUCT_NAME);
 495     const UINT flags = MB_OKCANCEL | MB_ICONWARNING | MB_TOPMOST;
 496     if (IDOK == ui::MessageBox(NULL, msg, caption, flags))
 497       ShellExecute(NULL, NULL, L"appwiz.cpl", NULL, NULL, SW_SHOWNORMAL);
 498
 499     // Exit as we are not launching the browser.
 500     return content::RESULT_CODE_NORMAL_EXIT;
 501   }
 502   // We don't hide icons so we shouldn't do anything special to show them
 503   return chrome::RESULT_CODE_UNSUPPORTED_PARAM;
 504 }
 505
 506 // static
 507 bool ChromeBrowserMainPartsWin::CheckMachineLevelInstall() {
 508   // TODO(tommi): Check if using the default distribution is always the right
 509   // thing to do.
 510   BrowserDistribution* dist = BrowserDistribution::GetDistribution();
 511   Version version;
 512   InstallUtil::GetChromeVersion(dist, true, &version);
 513   if (version.IsValid()) {
 514     base::FilePath exe_path;
 515     PathService::Get(base::DIR_EXE, &exe_path);
 516     std::wstring exe = exe_path.value();
 517     base::FilePath user_exe_path(installer::GetChromeInstallPath(false, dist));
 518     if (base::FilePath::CompareEqualIgnoreCase(exe, user_exe_path.value())) {
 519       bool is_metro = base::win::IsMetroProcess();
 520       if (!is_metro) {
 521         // The dialog cannot be shown in Win8 Metro as doing so hangs Chrome on
 522         // an invisible dialog.
 523         // TODO (gab): Get rid of this dialog altogether and auto-launch
 524         // system-level Chrome instead.
 525         const base::string16 text =
 526             l10n_util::GetStringUTF16(IDS_MACHINE_LEVEL_INSTALL_CONFLICT);
 527         const base::string16 caption =
 528             l10n_util::GetStringUTF16(IDS_PRODUCT_NAME);
 529         const UINT flags = MB_OK | MB_ICONERROR | MB_TOPMOST;
 530         ui::MessageBox(NULL, text, caption, flags);
 531       }
 532       base::CommandLine uninstall_cmd(
 533           InstallUtil::GetChromeUninstallCmd(false, dist->GetType()));
 534       if (!uninstall_cmd.GetProgram().empty()) {
 535         uninstall_cmd.AppendSwitch(installer::switches::kSelfDestruct);
 536         uninstall_cmd.AppendSwitch(installer::switches::kForceUninstall);
 537         uninstall_cmd.AppendSwitch(
 538             installer::switches::kDoNotRemoveSharedItems);
 539
 540         // Trigger Active Setup for the system-level Chrome to make sure
 541         // per-user shortcuts to the system-level Chrome are created. Skip this
 542         // if the system-level Chrome will undergo first run anyway, as Active
 543         // Setup is triggered on system-level Chrome's first run.
 544         // TODO(gab): Instead of having callers of Active Setup think about
 545         // other callers, have Active Setup itself register when it ran and
 546         // no-op otherwise (http://crbug.com/346843).
 547         if (!first_run::IsChromeFirstRun())
 548           uninstall_cmd.AppendSwitch(installer::switches::kTriggerActiveSetup);
 549
 550         const base::FilePath setup_exe(uninstall_cmd.GetProgram());
 551         const base::string16 params(uninstall_cmd.GetArgumentsString());
 552
 553         SHELLEXECUTEINFO sei = { sizeof(sei) };
 554         sei.fMask = SEE_MASK_NOASYNC;
 555         sei.nShow = SW_SHOWNORMAL;
 556         sei.lpFile = setup_exe.value().c_str();
 557         sei.lpParameters = params.c_str();
 558         // On Windows 8 SEE_MASK_FLAG_LOG_USAGE is necessary to guarantee we
 559         // flip to the Desktop when launching.
 560         if (is_metro)
 561           sei.fMask |= SEE_MASK_FLAG_LOG_USAGE;
 562
 563         if (!::ShellExecuteEx(&sei))
 564           DPCHECK(false);
 565       }
 566       return true;
 567     }
 568   }
 569   return false;
 570 }
 571
 572 base::string16 TranslationDelegate::GetLocalizedString(
 573     int installer_string_id) {
 574   int resource_id = 0;
 575   switch (installer_string_id) {
 576   // HANDLE_STRING is used by the DO_INSTALLER_STRING_MAPPING macro which is in
 577   // the generated header installer_util_strings.h.
 578 #define HANDLE_STRING(base_id, chrome_id) \
 579   case base_id: \
 580     resource_id = chrome_id; \
 581     break;
 582   DO_INSTALLER_STRING_MAPPING
 583 #undef HANDLE_STRING
 584   default:
 585     NOTREACHED();
 586   }
 587   if (resource_id)
 588     return l10n_util::GetStringUTF16(resource_id);
 589   return base::string16();
 590 }
 591
 592 // static
 593 void ChromeBrowserMainPartsWin::SetupInstallerUtilStrings() {
 594   CR_DEFINE_STATIC_LOCAL(TranslationDelegate, delegate, ());
 595   installer::SetTranslationDelegate(&delegate);
 596 }