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