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