chrome/browser/web_applications/web_app_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/web_applications/web_app_win.h"
   6
   7 #include <shlobj.h>
   8
   9 #include "base/command_line.h"
  10 #include "base/file_util.h"
  11 #include "base/files/file_enumerator.h"
  12 #include "base/logging.h"
  13 #include "base/md5.h"
  14 #include "base/path_service.h"
  15 #include "base/strings/string_piece.h"
  16 #include "base/strings/stringprintf.h"
  17 #include "base/strings/utf_string_conversions.h"
  18 #include "base/win/shortcut.h"
  19 #include "base/win/windows_version.h"
  20 #include "chrome/browser/web_applications/web_app.h"
  21 #include "chrome/common/chrome_switches.h"
  22 #include "chrome/installer/util/browser_distribution.h"
  23 #include "chrome/installer/util/shell_util.h"
  24 #include "chrome/installer/util/util_constants.h"
  25 #include "content/public/browser/browser_thread.h"
  26 #include "ui/gfx/icon_util.h"
  27 #include "ui/gfx/image/image.h"
  28 #include "ui/gfx/image/image_family.h"
  29
  30 namespace {
  31
  32 const base::FilePath::CharType kIconChecksumFileExt[] =
  33     FILE_PATH_LITERAL(".ico.md5");
  34
  35 // Width and height of icons exported to .ico files.
  36
  37 // Calculates checksum of an icon family using MD5.
  38 // The checksum is derived from all of the icons in the family.
  39 void GetImageCheckSum(const gfx::ImageFamily& image, base::MD5Digest* digest) {
  40   DCHECK(digest);
  41   base::MD5Context md5_context;
  42   base::MD5Init(&md5_context);
  43
  44   for (gfx::ImageFamily::const_iterator it = image.begin(); it != image.end();
  45        ++it) {
  46     SkBitmap bitmap = it->AsBitmap();
  47
  48     SkAutoLockPixels image_lock(bitmap);
  49     base::StringPiece image_data(
  50         reinterpret_cast<const char*>(bitmap.getPixels()), bitmap.getSize());
  51     base::MD5Update(&md5_context, image_data);
  52   }
  53
  54   base::MD5Final(digest, &md5_context);
  55 }
  56
  57 // Saves |image| as an |icon_file| with the checksum.
  58 bool SaveIconWithCheckSum(const base::FilePath& icon_file,
  59                           const gfx::ImageFamily& image) {
  60   if (!IconUtil::CreateIconFileFromImageFamily(image, icon_file))
  61     return false;
  62
  63   base::MD5Digest digest;
  64   GetImageCheckSum(image, &digest);
  65
  66   base::FilePath cheksum_file(icon_file.ReplaceExtension(kIconChecksumFileExt));
  67   return file_util::WriteFile(cheksum_file,
  68                               reinterpret_cast<const char*>(&digest),
  69                               sizeof(digest)) == sizeof(digest);
  70 }
  71
  72 // Returns true if |icon_file| is missing or different from |image|.
  73 bool ShouldUpdateIcon(const base::FilePath& icon_file,
  74                       const gfx::ImageFamily& image) {
  75   base::FilePath checksum_file(
  76       icon_file.ReplaceExtension(kIconChecksumFileExt));
  77
  78   // Returns true if icon_file or checksum file is missing.
  79   if (!base::PathExists(icon_file) ||
  80       !base::PathExists(checksum_file))
  81     return true;
  82
  83   base::MD5Digest persisted_image_checksum;
  84   if (sizeof(persisted_image_checksum) != base::ReadFile(checksum_file,
  85                       reinterpret_cast<char*>(&persisted_image_checksum),
  86                       sizeof(persisted_image_checksum)))
  87     return true;
  88
  89   base::MD5Digest downloaded_image_checksum;
  90   GetImageCheckSum(image, &downloaded_image_checksum);
  91
  92   // Update icon if checksums are not equal.
  93   return memcmp(&persisted_image_checksum, &downloaded_image_checksum,
  94                 sizeof(base::MD5Digest)) != 0;
  95 }
  96
  97 // Returns true if |shortcut_file_name| matches profile |profile_path|, and has
  98 // an --app-id flag.
  99 bool IsAppShortcutForProfile(const base::FilePath& shortcut_file_name,
 100                              const base::FilePath& profile_path) {
 101   base::string16 cmd_line_string;
 102   if (base::win::ResolveShortcut(shortcut_file_name, NULL, &cmd_line_string)) {
 103     cmd_line_string = L"program " + cmd_line_string;
 104     CommandLine shortcut_cmd_line = CommandLine::FromString(cmd_line_string);
 105     return shortcut_cmd_line.HasSwitch(switches::kProfileDirectory) &&
 106            shortcut_cmd_line.GetSwitchValuePath(switches::kProfileDirectory) ==
 107                profile_path.BaseName() &&
 108            shortcut_cmd_line.HasSwitch(switches::kAppId);
 109   }
 110
 111   return false;
 112 }
 113
 114 // Finds shortcuts in |shortcut_path| that match profile for |profile_path| and
 115 // extension with title |shortcut_name|.
 116 // If |shortcut_name| is empty, finds all shortcuts matching |profile_path|.
 117 std::vector<base::FilePath> FindAppShortcutsByProfileAndTitle(
 118     const base::FilePath& shortcut_path,
 119     const base::FilePath& profile_path,
 120     const base::string16& shortcut_name) {
 121   std::vector<base::FilePath> shortcut_paths;
 122
 123   if (shortcut_name.empty()) {
 124     // Find all shortcuts for this profile.
 125     base::FileEnumerator files(shortcut_path, false,
 126                                base::FileEnumerator::FILES,
 127                                FILE_PATH_LITERAL("*.lnk"));
 128     base::FilePath shortcut_file = files.Next();
 129     while (!shortcut_file.empty()) {
 130       if (IsAppShortcutForProfile(shortcut_file, profile_path))
 131         shortcut_paths.push_back(shortcut_file);
 132       shortcut_file = files.Next();
 133     }
 134   } else {
 135     // Find all shortcuts matching |shortcut_name|.
 136     base::FilePath base_path = shortcut_path.
 137         Append(web_app::internals::GetSanitizedFileName(shortcut_name)).
 138         AddExtension(FILE_PATH_LITERAL(".lnk"));
 139
 140     const int fileNamesToCheck = 10;
 141     for (int i = 0; i < fileNamesToCheck; ++i) {
 142       base::FilePath shortcut_file = base_path;
 143       if (i > 0) {
 144         shortcut_file = shortcut_file.InsertBeforeExtensionASCII(
 145             base::StringPrintf(" (%d)", i));
 146       }
 147       if (base::PathExists(shortcut_file) &&
 148           IsAppShortcutForProfile(shortcut_file, profile_path)) {
 149         shortcut_paths.push_back(shortcut_file);
 150       }
 151     }
 152   }
 153
 154   return shortcut_paths;
 155 }
 156
 157 // Creates application shortcuts in a given set of paths.
 158 // |shortcut_paths| is a list of directories in which shortcuts should be
 159 // created. If |creation_reason| is SHORTCUT_CREATION_AUTOMATED and there is an
 160 // existing shortcut to this app for this profile, does nothing (succeeding).
 161 // Returns true on success, false on failure.
 162 // Must be called on the FILE thread.
 163 bool CreateShortcutsInPaths(
 164     const base::FilePath& web_app_path,
 165     const ShellIntegration::ShortcutInfo& shortcut_info,
 166     const std::vector<base::FilePath>& shortcut_paths,
 167     web_app::ShortcutCreationReason creation_reason,
 168     std::vector<base::FilePath>* out_filenames) {
 169   // Ensure web_app_path exists.
 170   if (!base::PathExists(web_app_path) &&
 171       !base::CreateDirectory(web_app_path)) {
 172     return false;
 173   }
 174
 175   // Generates file name to use with persisted ico and shortcut file.
 176   base::FilePath file_name =
 177       web_app::internals::GetSanitizedFileName(shortcut_info.title);
 178
 179   // Creates an ico file to use with shortcut.
 180   base::FilePath icon_file = web_app_path.Append(file_name).AddExtension(
 181       FILE_PATH_LITERAL(".ico"));
 182   if (!web_app::internals::CheckAndSaveIcon(icon_file, shortcut_info.favicon)) {
 183     return false;
 184   }
 185
 186   base::FilePath chrome_exe;
 187   if (!PathService::Get(base::FILE_EXE, &chrome_exe)) {
 188     NOTREACHED();
 189     return false;
 190   }
 191
 192   // Working directory.
 193   base::FilePath working_dir(chrome_exe.DirName());
 194
 195   CommandLine cmd_line(CommandLine::NO_PROGRAM);
 196   cmd_line = ShellIntegration::CommandLineArgsForLauncher(shortcut_info.url,
 197       shortcut_info.extension_id, shortcut_info.profile_path);
 198
 199   // TODO(evan): we rely on the fact that command_line_string() is
 200   // properly quoted for a Windows command line.  The method on
 201   // CommandLine should probably be renamed to better reflect that
 202   // fact.
 203   base::string16 wide_switches(cmd_line.GetCommandLineString());
 204
 205   // Sanitize description
 206   base::string16 description = shortcut_info.description;
 207   if (description.length() >= MAX_PATH)
 208     description.resize(MAX_PATH - 1);
 209
 210   // Generates app id from web app url and profile path.
 211   std::string app_name(web_app::GenerateApplicationNameFromInfo(shortcut_info));
 212   base::string16 app_id(ShellIntegration::GetAppModelIdForProfile(
 213       base::UTF8ToUTF16(app_name), shortcut_info.profile_path));
 214
 215   bool success = true;
 216   for (size_t i = 0; i < shortcut_paths.size(); ++i) {
 217     base::FilePath shortcut_file = shortcut_paths[i].Append(file_name).
 218         AddExtension(installer::kLnkExt);
 219     if (creation_reason == web_app::SHORTCUT_CREATION_AUTOMATED) {
 220       // Check whether there is an existing shortcut to this app.
 221       std::vector<base::FilePath> shortcut_files =
 222           FindAppShortcutsByProfileAndTitle(shortcut_paths[i],
 223                                             shortcut_info.profile_path,
 224                                             shortcut_info.title);
 225       if (!shortcut_files.empty())
 226         continue;
 227     }
 228     if (shortcut_paths[i] != web_app_path) {
 229       int unique_number =
 230           file_util::GetUniquePathNumber(shortcut_file, FILE_PATH_LITERAL(""));
 231       if (unique_number == -1) {
 232         success = false;
 233         continue;
 234       } else if (unique_number > 0) {
 235         shortcut_file = shortcut_file.InsertBeforeExtensionASCII(
 236             base::StringPrintf(" (%d)", unique_number));
 237       }
 238     }
 239     base::win::ShortcutProperties shortcut_properties;
 240     shortcut_properties.set_target(chrome_exe);
 241     shortcut_properties.set_working_dir(working_dir);
 242     shortcut_properties.set_arguments(wide_switches);
 243     shortcut_properties.set_description(description);
 244     shortcut_properties.set_icon(icon_file, 0);
 245     shortcut_properties.set_app_id(app_id);
 246     shortcut_properties.set_dual_mode(false);
 247     if (!base::PathExists(shortcut_file.DirName()) &&
 248         !base::CreateDirectory(shortcut_file.DirName())) {
 249       NOTREACHED();
 250       return false;
 251     }
 252     success = base::win::CreateOrUpdateShortcutLink(
 253         shortcut_file, shortcut_properties,
 254         base::win::SHORTCUT_CREATE_ALWAYS) && success;
 255     if (out_filenames)
 256       out_filenames->push_back(shortcut_file);
 257   }
 258
 259   return success;
 260 }
 261
 262 // Gets the directories with shortcuts for an app, and deletes the shortcuts.
 263 // This will search the standard locations for shortcuts named |title| that open
 264 // in the profile with |profile_path|.
 265 // |was_pinned_to_taskbar| will be set to true if there was previously a
 266 // shortcut pinned to the taskbar for this app; false otherwise.
 267 // If |web_app_path| is empty, this will not delete shortcuts from the web app
 268 // directory. If |title| is empty, all shortcuts for this profile will be
 269 // deleted.
 270 // |shortcut_paths| will be populated with a list of directories where shortcuts
 271 // for this app were found (and deleted). This will delete duplicate shortcuts,
 272 // but only return each path once, even if it contained multiple deleted
 273 // shortcuts. Both of these may be NULL.
 274 void GetShortcutLocationsAndDeleteShortcuts(
 275     const base::FilePath& web_app_path,
 276     const base::FilePath& profile_path,
 277     const base::string16& title,
 278     bool* was_pinned_to_taskbar,
 279     std::vector<base::FilePath>* shortcut_paths) {
 280   DCHECK(content::BrowserThread::CurrentlyOn(content::BrowserThread::FILE));
 281
 282   // Get all possible locations for shortcuts.
 283   ShellIntegration::ShortcutLocations all_shortcut_locations;
 284   all_shortcut_locations.in_quick_launch_bar = true;
 285   all_shortcut_locations.on_desktop = true;
 286   // Delete shortcuts from the Chrome Apps subdirectory.
 287   // This matches the subdir name set by CreateApplicationShortcutView::Accept
 288   // for Chrome apps (not URL apps, but this function does not apply for them).
 289   all_shortcut_locations.applications_menu_location =
 290       ShellIntegration::APP_MENU_LOCATION_SUBDIR_CHROMEAPPS;
 291   std::vector<base::FilePath> all_paths = web_app::internals::GetShortcutPaths(
 292       all_shortcut_locations);
 293   if (base::win::GetVersion() >= base::win::VERSION_WIN7 &&
 294       !web_app_path.empty()) {
 295     all_paths.push_back(web_app_path);
 296   }
 297
 298   if (was_pinned_to_taskbar) {
 299     // Determine if there is a link to this app in the TaskBar pin directory.
 300     base::FilePath taskbar_pin_path;
 301     if (PathService::Get(base::DIR_TASKBAR_PINS, &taskbar_pin_path)) {
 302       std::vector<base::FilePath> taskbar_pin_files =
 303           FindAppShortcutsByProfileAndTitle(taskbar_pin_path, profile_path,
 304                                             title);
 305       *was_pinned_to_taskbar = !taskbar_pin_files.empty();
 306     } else {
 307       *was_pinned_to_taskbar = false;
 308     }
 309   }
 310
 311   for (std::vector<base::FilePath>::const_iterator i = all_paths.begin();
 312        i != all_paths.end(); ++i) {
 313     std::vector<base::FilePath> shortcut_files =
 314         FindAppShortcutsByProfileAndTitle(*i, profile_path, title);
 315     if (shortcut_paths && !shortcut_files.empty()) {
 316       shortcut_paths->push_back(*i);
 317     }
 318     for (std::vector<base::FilePath>::const_iterator j = shortcut_files.begin();
 319          j != shortcut_files.end(); ++j) {
 320       // Any shortcut could have been pinned, either by chrome or the user, so
 321       // they are all unpinned.
 322       base::win::TaskbarUnpinShortcutLink(j->value().c_str());
 323       base::DeleteFile(*j, false);
 324     }
 325   }
 326 }
 327
 328 }  // namespace
 329
 330 namespace web_app {
 331
 332 base::FilePath CreateShortcutInWebAppDir(
 333     const base::FilePath& web_app_dir,
 334     const ShellIntegration::ShortcutInfo& shortcut_info) {
 335   std::vector<base::FilePath> paths;
 336   paths.push_back(web_app_dir);
 337   std::vector<base::FilePath> out_filenames;
 338   CreateShortcutsInPaths(web_app_dir, shortcut_info, paths,
 339                          SHORTCUT_CREATION_BY_USER, &out_filenames);
 340   DCHECK_EQ(out_filenames.size(), 1u);
 341   return out_filenames[0];
 342 }
 343
 344 namespace internals {
 345
 346 // Saves |image| to |icon_file| if the file is outdated and refresh shell's
 347 // icon cache to ensure correct icon is displayed. Returns true if icon_file
 348 // is up to date or successfully updated.
 349 bool CheckAndSaveIcon(const base::FilePath& icon_file,
 350                       const gfx::ImageFamily& image) {
 351   if (ShouldUpdateIcon(icon_file, image)) {
 352     if (SaveIconWithCheckSum(icon_file, image)) {
 353       // Refresh shell's icon cache. This call is quite disruptive as user would
 354       // see explorer rebuilding the icon cache. It would be great that we find
 355       // a better way to achieve this.
 356       SHChangeNotify(SHCNE_ASSOCCHANGED, SHCNF_IDLIST | SHCNF_FLUSHNOWAIT,
 357                      NULL, NULL);
 358     } else {
 359       return false;
 360     }
 361   }
 362
 363   return true;
 364 }
 365
 366 bool CreatePlatformShortcuts(
 367     const base::FilePath& web_app_path,
 368     const ShellIntegration::ShortcutInfo& shortcut_info,
 369     const ShellIntegration::ShortcutLocations& creation_locations,
 370     ShortcutCreationReason creation_reason) {
 371   DCHECK(content::BrowserThread::CurrentlyOn(content::BrowserThread::FILE));
 372
 373   // Shortcut paths under which to create shortcuts.
 374   std::vector<base::FilePath> shortcut_paths =
 375       GetShortcutPaths(creation_locations);
 376
 377   bool pin_to_taskbar = creation_locations.in_quick_launch_bar &&
 378                         (base::win::GetVersion() >= base::win::VERSION_WIN7);
 379
 380   // Create/update the shortcut in the web app path for the "Pin To Taskbar"
 381   // option in Win7. We use the web app path shortcut because we will overwrite
 382   // it rather than appending unique numbers if the shortcut already exists.
 383   // This prevents pinned apps from having unique numbers in their names.
 384   if (pin_to_taskbar)
 385     shortcut_paths.push_back(web_app_path);
 386
 387   if (shortcut_paths.empty())
 388     return false;
 389
 390   if (!CreateShortcutsInPaths(web_app_path, shortcut_info, shortcut_paths,
 391                               creation_reason, NULL))
 392     return false;
 393
 394   if (pin_to_taskbar) {
 395     base::FilePath file_name =
 396         web_app::internals::GetSanitizedFileName(shortcut_info.title);
 397     // Use the web app path shortcut for pinning to avoid having unique numbers
 398     // in the application name.
 399     base::FilePath shortcut_to_pin = web_app_path.Append(file_name).
 400         AddExtension(installer::kLnkExt);
 401     if (!base::win::TaskbarPinShortcutLink(shortcut_to_pin.value().c_str()))
 402       return false;
 403   }
 404
 405   return true;
 406 }
 407
 408 void UpdatePlatformShortcuts(
 409     const base::FilePath& web_app_path,
 410     const base::string16& old_app_title,
 411     const ShellIntegration::ShortcutInfo& shortcut_info) {
 412   DCHECK(content::BrowserThread::CurrentlyOn(content::BrowserThread::FILE));
 413
 414   // Generates file name to use with persisted ico and shortcut file.
 415   base::FilePath file_name =
 416       web_app::internals::GetSanitizedFileName(shortcut_info.title);
 417
 418   if (old_app_title != shortcut_info.title) {
 419     // The app's title has changed. Delete all existing app shortcuts and
 420     // recreate them in any locations they already existed (but do not add them
 421     // to locations where they do not currently exist).
 422     bool was_pinned_to_taskbar;
 423     std::vector<base::FilePath> shortcut_paths;
 424     GetShortcutLocationsAndDeleteShortcuts(
 425         web_app_path, shortcut_info.profile_path, old_app_title,
 426         &was_pinned_to_taskbar, &shortcut_paths);
 427     CreateShortcutsInPaths(web_app_path, shortcut_info, shortcut_paths,
 428                            SHORTCUT_CREATION_BY_USER, NULL);
 429     // If the shortcut was pinned to the taskbar,
 430     // GetShortcutLocationsAndDeleteShortcuts will have deleted it. In that
 431     // case, re-pin it.
 432     if (was_pinned_to_taskbar) {
 433       base::FilePath file_name =
 434           web_app::internals::GetSanitizedFileName(shortcut_info.title);
 435       // Use the web app path shortcut for pinning to avoid having unique
 436       // numbers in the application name.
 437       base::FilePath shortcut_to_pin = web_app_path.Append(file_name).
 438           AddExtension(installer::kLnkExt);
 439       base::win::TaskbarPinShortcutLink(shortcut_to_pin.value().c_str());
 440     }
 441   }
 442
 443   // If an icon file exists, and is out of date, replace it with the new icon
 444   // and let the shell know the icon has been modified.
 445   base::FilePath icon_file = web_app_path.Append(file_name).AddExtension(
 446       FILE_PATH_LITERAL(".ico"));
 447   if (base::PathExists(icon_file)) {
 448     web_app::internals::CheckAndSaveIcon(icon_file, shortcut_info.favicon);
 449   }
 450 }
 451
 452 void DeletePlatformShortcuts(
 453     const base::FilePath& web_app_path,
 454     const ShellIntegration::ShortcutInfo& shortcut_info) {
 455   GetShortcutLocationsAndDeleteShortcuts(
 456       web_app_path, shortcut_info.profile_path, shortcut_info.title, NULL,
 457       NULL);
 458
 459   // If there are no more shortcuts in the Chrome Apps subdirectory, remove it.
 460   base::FilePath chrome_apps_dir;
 461   if (ShellUtil::GetShortcutPath(
 462           ShellUtil::SHORTCUT_LOCATION_START_MENU_CHROME_APPS_DIR,
 463           BrowserDistribution::GetDistribution(),
 464           ShellUtil::CURRENT_USER,
 465           &chrome_apps_dir)) {
 466     if (base::IsDirectoryEmpty(chrome_apps_dir))
 467       base::DeleteFile(chrome_apps_dir, false);
 468   }
 469 }
 470
 471 void DeleteAllShortcutsForProfile(const base::FilePath& profile_path) {
 472   GetShortcutLocationsAndDeleteShortcuts(base::FilePath(), profile_path, L"",
 473                                          NULL, NULL);
 474
 475   // If there are no more shortcuts in the Chrome Apps subdirectory, remove it.
 476   base::FilePath chrome_apps_dir;
 477   if (ShellUtil::GetShortcutPath(
 478           ShellUtil::SHORTCUT_LOCATION_START_MENU_CHROME_APPS_DIR,
 479           BrowserDistribution::GetDistribution(),
 480           ShellUtil::CURRENT_USER,
 481           &chrome_apps_dir)) {
 482     if (base::IsDirectoryEmpty(chrome_apps_dir))
 483       base::DeleteFile(chrome_apps_dir, false);
 484   }
 485 }
 486
 487 std::vector<base::FilePath> GetShortcutPaths(
 488     const ShellIntegration::ShortcutLocations& creation_locations) {
 489   // Shortcut paths under which to create shortcuts.
 490   std::vector<base::FilePath> shortcut_paths;
 491   // Locations to add to shortcut_paths.
 492   struct {
 493     bool use_this_location;
 494     ShellUtil::ShortcutLocation location_id;
 495   } locations[] = {
 496     {
 497       creation_locations.on_desktop,
 498       ShellUtil::SHORTCUT_LOCATION_DESKTOP
 499     }, {
 500       creation_locations.applications_menu_location ==
 501           ShellIntegration::APP_MENU_LOCATION_ROOT,
 502       ShellUtil::SHORTCUT_LOCATION_START_MENU_ROOT
 503     }, {
 504       creation_locations.applications_menu_location ==
 505           ShellIntegration::APP_MENU_LOCATION_SUBDIR_CHROME,
 506       ShellUtil::SHORTCUT_LOCATION_START_MENU_CHROME_DIR
 507     }, {
 508       creation_locations.applications_menu_location ==
 509           ShellIntegration::APP_MENU_LOCATION_SUBDIR_CHROMEAPPS,
 510       ShellUtil::SHORTCUT_LOCATION_START_MENU_CHROME_APPS_DIR
 511     }, {
 512       // For Win7+, |in_quick_launch_bar| indicates that we are pinning to
 513       // taskbar. This needs to be handled by callers.
 514       creation_locations.in_quick_launch_bar &&
 515           base::win::GetVersion() < base::win::VERSION_WIN7,
 516       ShellUtil::SHORTCUT_LOCATION_QUICK_LAUNCH
 517     }
 518   };
 519
 520   BrowserDistribution* dist = BrowserDistribution::GetDistribution();
 521   // Populate shortcut_paths.
 522   for (int i = 0; i < arraysize(locations); ++i) {
 523     if (locations[i].use_this_location) {
 524       base::FilePath path;
 525       if (!ShellUtil::GetShortcutPath(locations[i].location_id,
 526                                       dist,
 527                                       ShellUtil::CURRENT_USER,
 528                                       &path)) {
 529         NOTREACHED();
 530         continue;
 531       }
 532       shortcut_paths.push_back(path);
 533     }
 534   }
 535   return shortcut_paths;
 536 }
 537
 538 }  // namespace internals
 539
 540 }  // namespace web_app