chrome/browser/ui/webui/history_ui.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/ui/webui/history_ui.h"
   6
   7 #include <set>
   8
   9 #include "base/bind.h"
  10 #include "base/bind_helpers.h"
  11 #include "base/command_line.h"
  12 #include "base/i18n/rtl.h"
  13 #include "base/i18n/time_formatting.h"
  14 #include "base/memory/singleton.h"
  15 #include "base/message_loop/message_loop.h"
  16 #include "base/metrics/histogram.h"
  17 #include "base/prefs/pref_service.h"
  18 #include "base/strings/string16.h"
  19 #include "base/strings/string_number_conversions.h"
  20 #include "base/strings/utf_string_conversions.h"
  21 #include "base/time/time.h"
  22 #include "base/values.h"
  23 #include "chrome/browser/banners/app_banner_settings_helper.h"
  24 #include "chrome/browser/bookmarks/bookmark_model_factory.h"
  25 #include "chrome/browser/chrome_notification_types.h"
  26 #include "chrome/browser/history/history_service_factory.h"
  27 #include "chrome/browser/history/web_history_service_factory.h"
  28 #include "chrome/browser/profiles/profile.h"
  29 #include "chrome/browser/signin/signin_manager_factory.h"
  30 #include "chrome/browser/sync/profile_sync_service.h"
  31 #include "chrome/browser/sync/profile_sync_service_factory.h"
  32 #include "chrome/browser/ui/browser_finder.h"
  33 #include "chrome/browser/ui/chrome_pages.h"
  34 #include "chrome/browser/ui/webui/favicon_source.h"
  35 #include "chrome/browser/ui/webui/metrics_handler.h"
  36 #include "chrome/common/chrome_switches.h"
  37 #include "chrome/common/pref_names.h"
  38 #include "chrome/common/url_constants.h"
  39 #include "chrome/grit/generated_resources.h"
  40 #include "components/bookmarks/browser/bookmark_model.h"
  41 #include "components/bookmarks/browser/bookmark_utils.h"
  42 #include "components/history/core/browser/history_service.h"
  43 #include "components/history/core/browser/history_types.h"
  44 #include "components/history/core/browser/web_history_service.h"
  45 #include "components/search/search.h"
  46 #include "components/signin/core/browser/signin_manager.h"
  47 #include "components/sync_driver/device_info.h"
  48 #include "content/public/browser/url_data_source.h"
  49 #include "content/public/browser/web_ui.h"
  50 #include "content/public/browser/web_ui_data_source.h"
  51 #include "grit/browser_resources.h"
  52 #include "grit/theme_resources.h"
  53 #include "net/base/escape.h"
  54 #include "net/base/net_util.h"
  55 #include "sync/protocol/history_delete_directive_specifics.pb.h"
  56 #include "ui/base/l10n/l10n_util.h"
  57 #include "ui/base/l10n/time_format.h"
  58 #include "ui/base/resource/resource_bundle.h"
  59 #include "ui/base/webui/web_ui_util.h"
  60
  61 #if defined(ENABLE_EXTENSIONS)
  62 #include "chrome/browser/extensions/activity_log/activity_log.h"
  63 #endif
  64
  65 #if defined(ENABLE_SUPERVISED_USERS)
  66 #include "chrome/browser/supervised_user/supervised_user_navigation_observer.h"
  67 #include "chrome/browser/supervised_user/supervised_user_service.h"
  68 #include "chrome/browser/supervised_user/supervised_user_service_factory.h"
  69 #include "chrome/browser/supervised_user/supervised_user_url_filter.h"
  70 #endif
  71
  72 #if defined(OS_ANDROID)
  73 #include "chrome/browser/android/chromium_application.h"
  74 #endif
  75
  76 #if !defined(OS_ANDROID) && !defined(OS_IOS)
  77 #include "chrome/browser/ui/webui/foreign_session_handler.h"
  78 #include "chrome/browser/ui/webui/history_login_handler.h"
  79 #endif
  80
  81 using bookmarks::BookmarkModel;
  82
  83 static const char kStringsJsFile[] = "strings.js";
  84 static const char kHistoryJsFile[] = "history.js";
  85 static const char kOtherDevicesJsFile[] = "other_devices.js";
  86
  87 // The amount of time to wait for a response from the WebHistoryService.
  88 static const int kWebHistoryTimeoutSeconds = 3;
  89
  90 namespace {
  91
  92 // Buckets for UMA histograms.
  93 enum WebHistoryQueryBuckets {
  94   WEB_HISTORY_QUERY_FAILED = 0,
  95   WEB_HISTORY_QUERY_SUCCEEDED,
  96   WEB_HISTORY_QUERY_TIMED_OUT,
  97   NUM_WEB_HISTORY_QUERY_BUCKETS
  98 };
  99
 100 #if defined(OS_MACOSX)
 101 const char kIncognitoModeShortcut[] = "("
 102     "\xE2\x87\xA7"  // Shift symbol (U+21E7 'UPWARDS WHITE ARROW').
 103     "\xE2\x8C\x98"  // Command symbol (U+2318 'PLACE OF INTEREST SIGN').
 104     "N)";
 105 #elif defined(OS_WIN)
 106 const char kIncognitoModeShortcut[] = "(Ctrl+Shift+N)";
 107 #else
 108 const char kIncognitoModeShortcut[] = "(Shift+Ctrl+N)";
 109 #endif
 110
 111 // Identifiers for the type of device from which a history entry originated.
 112 static const char kDeviceTypeLaptop[] = "laptop";
 113 static const char kDeviceTypePhone[] = "phone";
 114 static const char kDeviceTypeTablet[] = "tablet";
 115
 116 content::WebUIDataSource* CreateHistoryUIHTMLSource(Profile* profile) {
 117   PrefService* prefs = profile->GetPrefs();
 118
 119   // Check if the profile is authenticated.  Guest profiles or incognito
 120   // windows may not have a sign in manager, and are considered not
 121   // authenticated.
 122   SigninManagerBase* signin_manager =
 123       SigninManagerFactory::GetForProfile(profile);
 124   bool is_authenticated = signin_manager != nullptr &&
 125       signin_manager->IsAuthenticated();
 126
 127   content::WebUIDataSource* source =
 128       content::WebUIDataSource::Create(chrome::kChromeUIHistoryFrameHost);
 129   source->AddBoolean("isUserSignedIn", is_authenticated);
 130   source->AddLocalizedString("collapseSessionMenuItemText",
 131       IDS_HISTORY_OTHER_SESSIONS_COLLAPSE_SESSION);
 132   source->AddLocalizedString("expandSessionMenuItemText",
 133       IDS_HISTORY_OTHER_SESSIONS_EXPAND_SESSION);
 134   source->AddLocalizedString("restoreSessionMenuItemText",
 135       IDS_HISTORY_OTHER_SESSIONS_OPEN_ALL);
 136   source->AddLocalizedString("xMore", IDS_HISTORY_OTHER_DEVICES_X_MORE);
 137   source->AddLocalizedString("loading", IDS_HISTORY_LOADING);
 138   source->AddLocalizedString("title", IDS_HISTORY_TITLE);
 139   source->AddLocalizedString("newest", IDS_HISTORY_NEWEST);
 140   source->AddLocalizedString("newer", IDS_HISTORY_NEWER);
 141   source->AddLocalizedString("older", IDS_HISTORY_OLDER);
 142   source->AddLocalizedString("searchResultsFor", IDS_HISTORY_SEARCHRESULTSFOR);
 143   source->AddLocalizedString("searchResult", IDS_HISTORY_SEARCH_RESULT);
 144   source->AddLocalizedString("searchResults", IDS_HISTORY_SEARCH_RESULTS);
 145   source->AddLocalizedString("foundSearchResults",
 146                              IDS_HISTORY_FOUND_SEARCH_RESULTS);
 147   source->AddLocalizedString("history", IDS_HISTORY_BROWSERESULTS);
 148   source->AddLocalizedString("cont", IDS_HISTORY_CONTINUED);
 149   source->AddLocalizedString("searchButton", IDS_HISTORY_SEARCH_BUTTON);
 150   source->AddLocalizedString("noSearchResults", IDS_HISTORY_NO_SEARCH_RESULTS);
 151   source->AddLocalizedString("noResults", IDS_HISTORY_NO_RESULTS);
 152   source->AddLocalizedString("historyInterval", IDS_HISTORY_INTERVAL);
 153   source->AddLocalizedString("removeSelected",
 154                              IDS_HISTORY_REMOVE_SELECTED_ITEMS);
 155   source->AddLocalizedString("clearAllHistory",
 156                              IDS_HISTORY_OPEN_CLEAR_BROWSING_DATA_DIALOG);
 157   source->AddString(
 158       "deleteWarning",
 159       l10n_util::GetStringFUTF16(IDS_HISTORY_DELETE_PRIOR_VISITS_WARNING,
 160                                  base::UTF8ToUTF16(kIncognitoModeShortcut)));
 161   source->AddLocalizedString("removeBookmark", IDS_HISTORY_REMOVE_BOOKMARK);
 162   source->AddLocalizedString("actionMenuDescription",
 163                              IDS_HISTORY_ACTION_MENU_DESCRIPTION);
 164   source->AddLocalizedString("removeFromHistory", IDS_HISTORY_REMOVE_PAGE);
 165   source->AddLocalizedString("moreFromSite", IDS_HISTORY_MORE_FROM_SITE);
 166   source->AddLocalizedString("groupByDomainLabel", IDS_GROUP_BY_DOMAIN_LABEL);
 167   source->AddLocalizedString("rangeLabel", IDS_HISTORY_RANGE_LABEL);
 168   source->AddLocalizedString("rangeAllTime", IDS_HISTORY_RANGE_ALL_TIME);
 169   source->AddLocalizedString("rangeWeek", IDS_HISTORY_RANGE_WEEK);
 170   source->AddLocalizedString("rangeMonth", IDS_HISTORY_RANGE_MONTH);
 171   source->AddLocalizedString("rangeToday", IDS_HISTORY_RANGE_TODAY);
 172   source->AddLocalizedString("rangeNext", IDS_HISTORY_RANGE_NEXT);
 173   source->AddLocalizedString("rangePrevious", IDS_HISTORY_RANGE_PREVIOUS);
 174   source->AddLocalizedString("numberVisits", IDS_HISTORY_NUMBER_VISITS);
 175   source->AddLocalizedString("filterAllowed", IDS_HISTORY_FILTER_ALLOWED);
 176   source->AddLocalizedString("filterBlocked", IDS_HISTORY_FILTER_BLOCKED);
 177   source->AddLocalizedString("inContentPack", IDS_HISTORY_IN_CONTENT_PACK);
 178   source->AddLocalizedString("allowItems", IDS_HISTORY_FILTER_ALLOW_ITEMS);
 179   source->AddLocalizedString("blockItems", IDS_HISTORY_FILTER_BLOCK_ITEMS);
 180   source->AddLocalizedString("lockButton", IDS_HISTORY_LOCK_BUTTON);
 181   source->AddLocalizedString("blockedVisitText",
 182                              IDS_HISTORY_BLOCKED_VISIT_TEXT);
 183   source->AddLocalizedString("unlockButton", IDS_HISTORY_UNLOCK_BUTTON);
 184   source->AddLocalizedString("hasSyncedResults",
 185                              IDS_HISTORY_HAS_SYNCED_RESULTS);
 186   source->AddLocalizedString("noSyncedResults", IDS_HISTORY_NO_SYNCED_RESULTS);
 187   source->AddLocalizedString("cancel", IDS_CANCEL);
 188   source->AddLocalizedString("deleteConfirm",
 189                              IDS_HISTORY_DELETE_PRIOR_VISITS_CONFIRM_BUTTON);
 190   source->AddLocalizedString("bookmarked", IDS_HISTORY_ENTRY_BOOKMARKED);
 191   source->AddLocalizedString("entrySummary", IDS_HISTORY_ENTRY_SUMMARY);
 192   source->AddBoolean("isFullHistorySyncEnabled",
 193                      WebHistoryServiceFactory::GetForProfile(profile) != NULL);
 194   bool group_by_domain = base::CommandLine::ForCurrentProcess()->HasSwitch(
 195       switches::kHistoryEnableGroupByDomain);
 196   // Supervised users get the "group by domain" version, but not on mobile,
 197   // because that version isn't adjusted for small screens yet. crbug.com/452859
 198 #if !defined(OS_ANDROID) && !defined(OS_IOS)
 199   group_by_domain = group_by_domain || profile->IsSupervised();
 200 #endif
 201   source->AddBoolean("groupByDomain", group_by_domain);
 202   bool allow_deleting_history =
 203       prefs->GetBoolean(prefs::kAllowDeletingBrowserHistory);
 204   source->AddBoolean("allowDeletingHistory", allow_deleting_history);
 205   source->AddBoolean("isInstantExtendedApiEnabled",
 206                      chrome::IsInstantExtendedAPIEnabled());
 207   source->AddBoolean("isSupervisedProfile", profile->IsSupervised());
 208   source->AddBoolean("hideDeleteVisitUI",
 209                      profile->IsSupervised() && !allow_deleting_history);
 210
 211   source->SetJsonPath(kStringsJsFile);
 212   source->AddResourcePath(kHistoryJsFile, IDR_HISTORY_JS);
 213   source->AddResourcePath(kOtherDevicesJsFile, IDR_OTHER_DEVICES_JS);
 214   source->SetDefaultResource(IDR_HISTORY_HTML);
 215   source->DisableDenyXFrameOptions();
 216
 217   return source;
 218 }
 219
 220 // Returns a localized version of |visit_time| including a relative
 221 // indicator (e.g. today, yesterday).
 222 base::string16 getRelativeDateLocalized(const base::Time& visit_time) {
 223   base::Time midnight = base::Time::Now().LocalMidnight();
 224   base::string16 date_str = ui::TimeFormat::RelativeDate(visit_time, &midnight);
 225   if (date_str.empty()) {
 226     date_str = base::TimeFormatFriendlyDate(visit_time);
 227   } else {
 228     date_str = l10n_util::GetStringFUTF16(
 229         IDS_HISTORY_DATE_WITH_RELATIVE_TIME,
 230         date_str,
 231         base::TimeFormatFriendlyDate(visit_time));
 232   }
 233   return date_str;
 234 }
 235
 236
 237 // Sets the correct year when substracting months from a date.
 238 void normalizeMonths(base::Time::Exploded* exploded) {
 239   // Decrease a year at a time until we have a proper date.
 240   while (exploded->month < 1) {
 241     exploded->month += 12;
 242     exploded->year--;
 243   }
 244 }
 245
 246 // Returns true if |entry| represents a local visit that had no corresponding
 247 // visit on the server.
 248 bool IsLocalOnlyResult(const BrowsingHistoryHandler::HistoryEntry& entry) {
 249   return entry.entry_type == BrowsingHistoryHandler::HistoryEntry::LOCAL_ENTRY;
 250 }
 251
 252 // Gets the name and type of a device for the given sync client ID.
 253 // |name| and |type| are out parameters.
 254 void GetDeviceNameAndType(const ProfileSyncService* sync_service,
 255                           const std::string& client_id,
 256                           std::string* name,
 257                           std::string* type) {
 258   // DeviceInfoTracker must be syncing in order for remote history entries to
 259   // be available.
 260   DCHECK(sync_service);
 261   DCHECK(sync_service->GetDeviceInfoTracker());
 262   DCHECK(sync_service->GetDeviceInfoTracker()->IsSyncing());
 263
 264   scoped_ptr<sync_driver::DeviceInfo> device_info =
 265       sync_service->GetDeviceInfoTracker()->GetDeviceInfo(client_id);
 266   if (device_info.get()) {
 267     *name = device_info->client_name();
 268     switch (device_info->device_type()) {
 269       case sync_pb::SyncEnums::TYPE_PHONE:
 270         *type = kDeviceTypePhone;
 271         break;
 272       case sync_pb::SyncEnums::TYPE_TABLET:
 273         *type = kDeviceTypeTablet;
 274         break;
 275       default:
 276         *type = kDeviceTypeLaptop;
 277     }
 278     return;
 279   }
 280
 281   *name = l10n_util::GetStringUTF8(IDS_HISTORY_UNKNOWN_DEVICE);
 282   *type = kDeviceTypeLaptop;
 283 }
 284
 285 }  // namespace
 286
 287 ////////////////////////////////////////////////////////////////////////////////
 288 //
 289 // BrowsingHistoryHandler
 290 //
 291 ////////////////////////////////////////////////////////////////////////////////
 292
 293 BrowsingHistoryHandler::HistoryEntry::HistoryEntry(
 294     BrowsingHistoryHandler::HistoryEntry::EntryType entry_type,
 295     const GURL& url, const base::string16& title, base::Time time,
 296     const std::string& client_id, bool is_search_result,
 297     const base::string16& snippet, bool blocked_visit,
 298     const std::string& accept_languages) {
 299   this->entry_type = entry_type;
 300   this->url = url;
 301   this->title = title;
 302   this->time = time;
 303   this->client_id = client_id;
 304   all_timestamps.insert(time.ToInternalValue());
 305   this->is_search_result = is_search_result;
 306   this->snippet = snippet;
 307   this->blocked_visit = blocked_visit;
 308   this->accept_languages = accept_languages;
 309 }
 310
 311 BrowsingHistoryHandler::HistoryEntry::HistoryEntry()
 312     : entry_type(EMPTY_ENTRY), is_search_result(false), blocked_visit(false) {
 313 }
 314
 315 BrowsingHistoryHandler::HistoryEntry::~HistoryEntry() {
 316 }
 317
 318 void BrowsingHistoryHandler::HistoryEntry::SetUrlAndTitle(
 319     base::DictionaryValue* result) const {
 320   result->SetString("url", url.spec());
 321
 322   bool using_url_as_the_title = false;
 323   base::string16 title_to_set(title);
 324   if (title.empty()) {
 325     using_url_as_the_title = true;
 326     title_to_set = base::UTF8ToUTF16(url.spec());
 327   }
 328
 329   // Since the title can contain BiDi text, we need to mark the text as either
 330   // RTL or LTR, depending on the characters in the string. If we use the URL
 331   // as the title, we mark the title as LTR since URLs are always treated as
 332   // left to right strings.
 333   if (base::i18n::IsRTL()) {
 334     if (using_url_as_the_title)
 335       base::i18n::WrapStringWithLTRFormatting(&title_to_set);
 336     else
 337       base::i18n::AdjustStringForLocaleDirection(&title_to_set);
 338   }
 339   result->SetString("title", title_to_set);
 340 }
 341
 342 scoped_ptr<base::DictionaryValue> BrowsingHistoryHandler::HistoryEntry::ToValue(
 343     BookmarkModel* bookmark_model,
 344     SupervisedUserService* supervised_user_service,
 345     const ProfileSyncService* sync_service) const {
 346   scoped_ptr<base::DictionaryValue> result(new base::DictionaryValue());
 347   SetUrlAndTitle(result.get());
 348
 349   base::string16 domain = net::IDNToUnicode(url.host(), accept_languages);
 350   // When the domain is empty, use the scheme instead. This allows for a
 351   // sensible treatment of e.g. file: URLs when group by domain is on.
 352   if (domain.empty())
 353     domain = base::UTF8ToUTF16(url.scheme() + ":");
 354
 355   // The items which are to be written into result are also described in
 356   // chrome/browser/resources/history/history.js in @typedef for
 357   // HistoryEntry. Please update it whenever you add or remove
 358   // any keys in result.
 359   result->SetString("domain", domain);
 360   result->SetDouble("time", time.ToJsTime());
 361
 362   // Pass the timestamps in a list.
 363   scoped_ptr<base::ListValue> timestamps(new base::ListValue);
 364   for (std::set<int64>::const_iterator it = all_timestamps.begin();
 365        it != all_timestamps.end(); ++it) {
 366     timestamps->AppendDouble(base::Time::FromInternalValue(*it).ToJsTime());
 367   }
 368   result->Set("allTimestamps", timestamps.release());
 369
 370   // Always pass the short date since it is needed both in the search and in
 371   // the monthly view.
 372   result->SetString("dateShort", base::TimeFormatShortDate(time));
 373
 374   // Only pass in the strings we need (search results need a shortdate
 375   // and snippet, browse results need day and time information).
 376   if (is_search_result) {
 377     result->SetString("snippet", snippet);
 378   } else {
 379     base::Time midnight = base::Time::Now().LocalMidnight();
 380     base::string16 date_str = ui::TimeFormat::RelativeDate(time, &midnight);
 381     if (date_str.empty()) {
 382       date_str = base::TimeFormatFriendlyDate(time);
 383     } else {
 384       date_str = l10n_util::GetStringFUTF16(
 385           IDS_HISTORY_DATE_WITH_RELATIVE_TIME,
 386           date_str,
 387           base::TimeFormatFriendlyDate(time));
 388     }
 389     result->SetString("dateRelativeDay", date_str);
 390     result->SetString("dateTimeOfDay", base::TimeFormatTimeOfDay(time));
 391   }
 392   result->SetBoolean("starred", bookmark_model->IsBookmarked(url));
 393
 394   std::string device_name;
 395   std::string device_type;
 396   if (!client_id.empty())
 397     GetDeviceNameAndType(sync_service, client_id, &device_name, &device_type);
 398   result->SetString("deviceName", device_name);
 399   result->SetString("deviceType", device_type);
 400
 401 #if defined(ENABLE_SUPERVISED_USERS)
 402   if (supervised_user_service) {
 403     const SupervisedUserURLFilter* url_filter =
 404         supervised_user_service->GetURLFilterForUIThread();
 405     int filtering_behavior =
 406         url_filter->GetFilteringBehaviorForURL(url.GetWithEmptyPath());
 407     result->SetInteger("hostFilteringBehavior", filtering_behavior);
 408
 409     result->SetBoolean("blockedVisit", blocked_visit);
 410   }
 411 #endif
 412
 413   return result.Pass();
 414 }
 415
 416 bool BrowsingHistoryHandler::HistoryEntry::SortByTimeDescending(
 417     const BrowsingHistoryHandler::HistoryEntry& entry1,
 418     const BrowsingHistoryHandler::HistoryEntry& entry2) {
 419   return entry1.time > entry2.time;
 420 }
 421
 422 BrowsingHistoryHandler::BrowsingHistoryHandler()
 423     : has_pending_delete_request_(false),
 424       history_service_observer_(this),
 425       weak_factory_(this) {
 426 }
 427
 428 BrowsingHistoryHandler::~BrowsingHistoryHandler() {
 429   query_task_tracker_.TryCancelAll();
 430   web_history_request_.reset();
 431 }
 432
 433 void BrowsingHistoryHandler::RegisterMessages() {
 434   // Create our favicon data source.
 435   Profile* profile = Profile::FromWebUI(web_ui());
 436   content::URLDataSource::Add(
 437       profile, new FaviconSource(profile, FaviconSource::ANY));
 438
 439   // Get notifications when history is cleared.
 440   history::HistoryService* hs = HistoryServiceFactory::GetForProfile(
 441       profile, ServiceAccessType::EXPLICIT_ACCESS);
 442   if (hs)
 443     history_service_observer_.Add(hs);
 444
 445   web_ui()->RegisterMessageCallback("queryHistory",
 446       base::Bind(&BrowsingHistoryHandler::HandleQueryHistory,
 447                  base::Unretained(this)));
 448   web_ui()->RegisterMessageCallback("removeVisits",
 449       base::Bind(&BrowsingHistoryHandler::HandleRemoveVisits,
 450                  base::Unretained(this)));
 451   web_ui()->RegisterMessageCallback("clearBrowsingData",
 452       base::Bind(&BrowsingHistoryHandler::HandleClearBrowsingData,
 453                  base::Unretained(this)));
 454   web_ui()->RegisterMessageCallback("removeBookmark",
 455       base::Bind(&BrowsingHistoryHandler::HandleRemoveBookmark,
 456                  base::Unretained(this)));
 457 }
 458
 459 bool BrowsingHistoryHandler::ExtractIntegerValueAtIndex(
 460     const base::ListValue* value,
 461     int index,
 462     int* out_int) {
 463   double double_value;
 464   if (value->GetDouble(index, &double_value)) {
 465     *out_int = static_cast<int>(double_value);
 466     return true;
 467   }
 468   NOTREACHED();
 469   return false;
 470 }
 471
 472 void BrowsingHistoryHandler::WebHistoryTimeout() {
 473   // TODO(dubroy): Communicate the failure to the front end.
 474   if (!query_task_tracker_.HasTrackedTasks())
 475     ReturnResultsToFrontEnd();
 476
 477   UMA_HISTOGRAM_ENUMERATION(
 478       "WebHistory.QueryCompletion",
 479       WEB_HISTORY_QUERY_TIMED_OUT, NUM_WEB_HISTORY_QUERY_BUCKETS);
 480 }
 481
 482 void BrowsingHistoryHandler::QueryHistory(
 483     base::string16 search_text, const history::QueryOptions& options) {
 484   Profile* profile = Profile::FromWebUI(web_ui());
 485
 486   // Anything in-flight is invalid.
 487   query_task_tracker_.TryCancelAll();
 488   web_history_request_.reset();
 489
 490   query_results_.clear();
 491   results_info_value_.Clear();
 492
 493   history::HistoryService* hs = HistoryServiceFactory::GetForProfile(
 494       profile, ServiceAccessType::EXPLICIT_ACCESS);
 495   hs->QueryHistory(search_text,
 496                    options,
 497                    base::Bind(&BrowsingHistoryHandler::QueryComplete,
 498                               base::Unretained(this),
 499                               search_text,
 500                               options),
 501                    &query_task_tracker_);
 502
 503   history::WebHistoryService* web_history =
 504       WebHistoryServiceFactory::GetForProfile(profile);
 505   if (web_history) {
 506     web_history_query_results_.clear();
 507     web_history_request_ = web_history->QueryHistory(
 508         search_text,
 509         options,
 510         base::Bind(&BrowsingHistoryHandler::WebHistoryQueryComplete,
 511                    base::Unretained(this),
 512                    search_text, options,
 513                    base::TimeTicks::Now()));
 514     // Start a timer so we know when to give up.
 515     web_history_timer_.Start(
 516         FROM_HERE, base::TimeDelta::FromSeconds(kWebHistoryTimeoutSeconds),
 517         this, &BrowsingHistoryHandler::WebHistoryTimeout);
 518
 519     // Set this to false until the results actually arrive.
 520     results_info_value_.SetBoolean("hasSyncedResults", false);
 521   }
 522 }
 523
 524 void BrowsingHistoryHandler::HandleQueryHistory(const base::ListValue* args) {
 525   history::QueryOptions options;
 526
 527   // Parse the arguments from JavaScript. There are five required arguments:
 528   // - the text to search for (may be empty)
 529   // - the offset from which the search should start (in multiples of week or
 530   //   month, set by the next argument).
 531   // - the range (BrowsingHistoryHandler::Range) Enum value that sets the range
 532   //   of the query.
 533   // - the end time for the query. Only results older than this time will be
 534   //   returned.
 535   // - the maximum number of results to return (may be 0, meaning that there
 536   //   is no maximum).
 537   base::string16 search_text = ExtractStringValue(args);
 538   int offset;
 539   if (!args->GetInteger(1, &offset)) {
 540     NOTREACHED() << "Failed to convert argument 1. ";
 541     return;
 542   }
 543   int range;
 544   if (!args->GetInteger(2, &range)) {
 545     NOTREACHED() << "Failed to convert argument 2. ";
 546     return;
 547   }
 548
 549   if (range == BrowsingHistoryHandler::MONTH)
 550     SetQueryTimeInMonths(offset, &options);
 551   else if (range == BrowsingHistoryHandler::WEEK)
 552     SetQueryTimeInWeeks(offset, &options);
 553
 554   double end_time;
 555   if (!args->GetDouble(3, &end_time)) {
 556     NOTREACHED() << "Failed to convert argument 3. ";
 557     return;
 558   }
 559   if (end_time)
 560     options.end_time = base::Time::FromJsTime(end_time);
 561
 562   if (!ExtractIntegerValueAtIndex(args, 4, &options.max_count)) {
 563     NOTREACHED() << "Failed to convert argument 4.";
 564     return;
 565   }
 566
 567   options.duplicate_policy = history::QueryOptions::REMOVE_DUPLICATES_PER_DAY;
 568   QueryHistory(search_text, options);
 569 }
 570
 571 void BrowsingHistoryHandler::HandleRemoveVisits(const base::ListValue* args) {
 572   Profile* profile = Profile::FromWebUI(web_ui());
 573   // TODO(davidben): history.js is not aware of this failure and will still
 574   // override |deleteCompleteCallback_|.
 575   if (delete_task_tracker_.HasTrackedTasks() ||
 576       has_pending_delete_request_ ||
 577       !profile->GetPrefs()->GetBoolean(prefs::kAllowDeletingBrowserHistory)) {
 578     web_ui()->CallJavascriptFunction("deleteFailed");
 579     return;
 580   }
 581
 582   history::HistoryService* history_service =
 583       HistoryServiceFactory::GetForProfile(profile,
 584                                            ServiceAccessType::EXPLICIT_ACCESS);
 585   history::WebHistoryService* web_history =
 586       WebHistoryServiceFactory::GetForProfile(profile);
 587
 588   base::Time now = base::Time::Now();
 589   std::vector<history::ExpireHistoryArgs> expire_list;
 590   expire_list.reserve(args->GetSize());
 591
 592   DCHECK(urls_to_be_deleted_.empty());
 593   for (base::ListValue::const_iterator it = args->begin();
 594        it != args->end(); ++it) {
 595     base::DictionaryValue* deletion = NULL;
 596     base::string16 url;
 597     base::ListValue* timestamps = NULL;
 598
 599     // Each argument is a dictionary with properties "url" and "timestamps".
 600     if (!((*it)->GetAsDictionary(&deletion) &&
 601         deletion->GetString("url", &url) &&
 602         deletion->GetList("timestamps", &timestamps))) {
 603       NOTREACHED() << "Unable to extract arguments";
 604       return;
 605     }
 606     DCHECK(timestamps->GetSize() > 0);
 607
 608     // In order to ensure that visits will be deleted from the server and other
 609     // clients (even if they are offline), create a sync delete directive for
 610     // each visit to be deleted.
 611     sync_pb::HistoryDeleteDirectiveSpecifics delete_directive;
 612     sync_pb::GlobalIdDirective* global_id_directive =
 613         delete_directive.mutable_global_id_directive();
 614
 615     double timestamp;
 616     history::ExpireHistoryArgs* expire_args = NULL;
 617     for (base::ListValue::const_iterator ts_iterator = timestamps->begin();
 618          ts_iterator != timestamps->end(); ++ts_iterator) {
 619       if (!(*ts_iterator)->GetAsDouble(&timestamp)) {
 620         NOTREACHED() << "Unable to extract visit timestamp.";
 621         continue;
 622       }
 623       base::Time visit_time = base::Time::FromJsTime(timestamp);
 624       if (!expire_args) {
 625         GURL gurl(url);
 626         expire_list.resize(expire_list.size() + 1);
 627         expire_args = &expire_list.back();
 628         expire_args->SetTimeRangeForOneDay(visit_time);
 629         expire_args->urls.insert(gurl);
 630         urls_to_be_deleted_.insert(gurl);
 631       }
 632       // The local visit time is treated as a global ID for the visit.
 633       global_id_directive->add_global_id(visit_time.ToInternalValue());
 634     }
 635
 636     // Set the start and end time in microseconds since the Unix epoch.
 637     global_id_directive->set_start_time_usec(
 638         (expire_args->begin_time - base::Time::UnixEpoch()).InMicroseconds());
 639
 640     // Delete directives shouldn't have an end time in the future.
 641     // TODO(dubroy): Use sane time (crbug.com/146090) here when it's ready.
 642     base::Time end_time = std::min(expire_args->end_time, now);
 643
 644     // -1 because end time in delete directives is inclusive.
 645     global_id_directive->set_end_time_usec(
 646         (end_time - base::Time::UnixEpoch()).InMicroseconds() - 1);
 647
 648     // TODO(dubroy): Figure out the proper way to handle an error here.
 649     if (web_history)
 650       history_service->ProcessLocalDeleteDirective(delete_directive);
 651   }
 652
 653   history_service->ExpireHistory(
 654       expire_list,
 655       base::Bind(&BrowsingHistoryHandler::RemoveComplete,
 656                  base::Unretained(this)),
 657       &delete_task_tracker_);
 658
 659   if (web_history) {
 660     has_pending_delete_request_ = true;
 661     web_history->ExpireHistory(
 662         expire_list,
 663         base::Bind(&BrowsingHistoryHandler::RemoveWebHistoryComplete,
 664                    weak_factory_.GetWeakPtr()));
 665   }
 666
 667 #if defined(ENABLE_EXTENSIONS)
 668   // If the profile has activity logging enabled also clean up any URLs from
 669   // the extension activity log. The extension activity log contains URLS
 670   // which websites an extension has activity on so it will indirectly
 671   // contain websites that a user has visited.
 672   extensions::ActivityLog* activity_log =
 673       extensions::ActivityLog::GetInstance(profile);
 674   for (std::vector<history::ExpireHistoryArgs>::const_iterator it =
 675        expire_list.begin(); it != expire_list.end(); ++it) {
 676     activity_log->RemoveURLs(it->urls);
 677   }
 678 #endif
 679
 680   for (const history::ExpireHistoryArgs& expire_entry : expire_list)
 681     AppBannerSettingsHelper::ClearHistoryForURLs(profile, expire_entry.urls);
 682 }
 683
 684 void BrowsingHistoryHandler::HandleClearBrowsingData(
 685     const base::ListValue* args) {
 686 #if defined(OS_ANDROID)
 687   chrome::android::ChromiumApplication::OpenClearBrowsingData(
 688       web_ui()->GetWebContents());
 689 #else
 690   // TODO(beng): This is an improper direct dependency on Browser. Route this
 691   // through some sort of delegate.
 692   Browser* browser = chrome::FindBrowserWithWebContents(
 693       web_ui()->GetWebContents());
 694   chrome::ShowClearBrowsingDataDialog(browser);
 695 #endif
 696 }
 697
 698 void BrowsingHistoryHandler::HandleRemoveBookmark(const base::ListValue* args) {
 699   base::string16 url = ExtractStringValue(args);
 700   Profile* profile = Profile::FromWebUI(web_ui());
 701   BookmarkModel* model = BookmarkModelFactory::GetForProfile(profile);
 702   bookmarks::RemoveAllBookmarks(model, GURL(url));
 703 }
 704
 705 // static
 706 void BrowsingHistoryHandler::MergeDuplicateResults(
 707     std::vector<BrowsingHistoryHandler::HistoryEntry>* results) {
 708   std::vector<BrowsingHistoryHandler::HistoryEntry> new_results;
 709   // Pre-reserve the size of the new vector. Since we're working with pointers
 710   // later on not doing this could lead to the vector being resized and to
 711   // pointers to invalid locations.
 712   new_results.reserve(results->size());
 713   // Maps a URL to the most recent entry on a particular day.
 714   std::map<GURL, BrowsingHistoryHandler::HistoryEntry*> current_day_entries;
 715
 716   // Keeps track of the day that |current_day_urls| is holding the URLs for,
 717   // in order to handle removing per-day duplicates.
 718   base::Time current_day_midnight;
 719
 720   std::sort(
 721       results->begin(), results->end(), HistoryEntry::SortByTimeDescending);
 722
 723   for (std::vector<BrowsingHistoryHandler::HistoryEntry>::const_iterator it =
 724            results->begin(); it != results->end(); ++it) {
 725     // Reset the list of found URLs when a visit from a new day is encountered.
 726     if (current_day_midnight != it->time.LocalMidnight()) {
 727       current_day_entries.clear();
 728       current_day_midnight = it->time.LocalMidnight();
 729     }
 730
 731     // Keep this visit if it's the first visit to this URL on the current day.
 732     if (current_day_entries.count(it->url) == 0) {
 733       new_results.push_back(*it);
 734       current_day_entries[it->url] = &new_results.back();
 735     } else {
 736       // Keep track of the timestamps of all visits to the URL on the same day.
 737       BrowsingHistoryHandler::HistoryEntry* entry =
 738           current_day_entries[it->url];
 739       entry->all_timestamps.insert(
 740           it->all_timestamps.begin(), it->all_timestamps.end());
 741
 742       if (entry->entry_type != it->entry_type) {
 743         entry->entry_type =
 744             BrowsingHistoryHandler::HistoryEntry::COMBINED_ENTRY;
 745       }
 746     }
 747   }
 748   results->swap(new_results);
 749 }
 750
 751 void BrowsingHistoryHandler::ReturnResultsToFrontEnd() {
 752   Profile* profile = Profile::FromWebUI(web_ui());
 753   BookmarkModel* bookmark_model = BookmarkModelFactory::GetForProfile(profile);
 754   SupervisedUserService* supervised_user_service = NULL;
 755 #if defined(ENABLE_SUPERVISED_USERS)
 756   if (profile->IsSupervised())
 757     supervised_user_service =
 758         SupervisedUserServiceFactory::GetForProfile(profile);
 759 #endif
 760   ProfileSyncService* sync_service =
 761       ProfileSyncServiceFactory::GetInstance()->GetForProfile(profile);
 762
 763   // Combine the local and remote results into |query_results_|, and remove
 764   // any duplicates.
 765   if (!web_history_query_results_.empty()) {
 766     int local_result_count = query_results_.size();
 767     query_results_.insert(query_results_.end(),
 768                           web_history_query_results_.begin(),
 769                           web_history_query_results_.end());
 770     MergeDuplicateResults(&query_results_);
 771
 772     if (local_result_count) {
 773       // In the best case, we expect that all local results are duplicated on
 774       // the server. Keep track of how many are missing.
 775       int missing_count = std::count_if(
 776           query_results_.begin(), query_results_.end(), IsLocalOnlyResult);
 777       UMA_HISTOGRAM_PERCENTAGE("WebHistory.LocalResultMissingOnServer",
 778                                missing_count * 100.0 / local_result_count);
 779     }
 780   }
 781
 782   // Convert the result vector into a ListValue.
 783   base::ListValue results_value;
 784   for (std::vector<BrowsingHistoryHandler::HistoryEntry>::iterator it =
 785            query_results_.begin(); it != query_results_.end(); ++it) {
 786     scoped_ptr<base::Value> value(
 787         it->ToValue(bookmark_model, supervised_user_service, sync_service));
 788     results_value.Append(value.release());
 789   }
 790
 791   web_ui()->CallJavascriptFunction(
 792       "historyResult", results_info_value_, results_value);
 793   results_info_value_.Clear();
 794   query_results_.clear();
 795   web_history_query_results_.clear();
 796 }
 797
 798 void BrowsingHistoryHandler::QueryComplete(
 799     const base::string16& search_text,
 800     const history::QueryOptions& options,
 801     history::QueryResults* results) {
 802   DCHECK_EQ(0U, query_results_.size());
 803   query_results_.reserve(results->size());
 804   const std::string accept_languages = GetAcceptLanguages();
 805
 806   for (size_t i = 0; i < results->size(); ++i) {
 807     history::URLResult const &page = (*results)[i];
 808     // TODO(dubroy): Use sane time (crbug.com/146090) here when it's ready.
 809     query_results_.push_back(
 810         HistoryEntry(
 811             HistoryEntry::LOCAL_ENTRY,
 812             page.url(),
 813             page.title(),
 814             page.visit_time(),
 815             std::string(),
 816             !search_text.empty(),
 817             page.snippet().text(),
 818             page.blocked_visit(),
 819             accept_languages));
 820   }
 821
 822   // The items which are to be written into results_info_value_ are also
 823   // described in chrome/browser/resources/history/history.js in @typedef for
 824   // HistoryQuery. Please update it whenever you add or remove any keys in
 825   // results_info_value_.
 826   results_info_value_.SetString("term", search_text);
 827   results_info_value_.SetBoolean("finished", results->reached_beginning());
 828
 829   // Add the specific dates that were searched to display them.
 830   // TODO(sergiu): Put today if the start is in the future.
 831   results_info_value_.SetString("queryStartTime",
 832                                 getRelativeDateLocalized(options.begin_time));
 833   if (!options.end_time.is_null()) {
 834     results_info_value_.SetString("queryEndTime",
 835         getRelativeDateLocalized(options.end_time -
 836                                  base::TimeDelta::FromDays(1)));
 837   } else {
 838     results_info_value_.SetString("queryEndTime",
 839         getRelativeDateLocalized(base::Time::Now()));
 840   }
 841   if (!web_history_timer_.IsRunning())
 842     ReturnResultsToFrontEnd();
 843 }
 844
 845 void BrowsingHistoryHandler::WebHistoryQueryComplete(
 846     const base::string16& search_text,
 847     const history::QueryOptions& options,
 848     base::TimeTicks start_time,
 849     history::WebHistoryService::Request* request,
 850     const base::DictionaryValue* results_value) {
 851   base::TimeDelta delta = base::TimeTicks::Now() - start_time;
 852   UMA_HISTOGRAM_TIMES("WebHistory.ResponseTime", delta);
 853   const std::string accept_languages = GetAcceptLanguages();
 854
 855   // If the response came in too late, do nothing.
 856   // TODO(dubroy): Maybe show a banner, and prompt the user to reload?
 857   if (!web_history_timer_.IsRunning())
 858     return;
 859   web_history_timer_.Stop();
 860
 861   UMA_HISTOGRAM_ENUMERATION(
 862       "WebHistory.QueryCompletion",
 863       results_value ? WEB_HISTORY_QUERY_SUCCEEDED : WEB_HISTORY_QUERY_FAILED,
 864       NUM_WEB_HISTORY_QUERY_BUCKETS);
 865
 866   DCHECK_EQ(0U, web_history_query_results_.size());
 867   const base::ListValue* events = NULL;
 868   if (results_value && results_value->GetList("event", &events)) {
 869     web_history_query_results_.reserve(events->GetSize());
 870     for (unsigned int i = 0; i < events->GetSize(); ++i) {
 871       const base::DictionaryValue* event = NULL;
 872       const base::DictionaryValue* result = NULL;
 873       const base::ListValue* results = NULL;
 874       const base::ListValue* ids = NULL;
 875       base::string16 url;
 876       base::string16 title;
 877       base::Time visit_time;
 878
 879       if (!(events->GetDictionary(i, &event) &&
 880           event->GetList("result", &results) &&
 881           results->GetDictionary(0, &result) &&
 882           result->GetString("url", &url) &&
 883           result->GetList("id", &ids) &&
 884           ids->GetSize() > 0)) {
 885         LOG(WARNING) << "Improperly formed JSON response from history server.";
 886         continue;
 887       }
 888       // Title is optional, so the return value is ignored here.
 889       result->GetString("title", &title);
 890
 891       // Extract the timestamps of all the visits to this URL.
 892       // They are referred to as "IDs" by the server.
 893       for (int j = 0; j < static_cast<int>(ids->GetSize()); ++j) {
 894         const base::DictionaryValue* id = NULL;
 895         std::string timestamp_string;
 896         int64 timestamp_usec = 0;
 897
 898         if (!ids->GetDictionary(j, &id) ||
 899             !id->GetString("timestamp_usec", &timestamp_string) ||
 900             !base::StringToInt64(timestamp_string, &timestamp_usec)) {
 901           NOTREACHED() << "Unable to extract timestamp.";
 902           continue;
 903         }
 904         // The timestamp on the server is a Unix time.
 905         base::Time time = base::Time::UnixEpoch() +
 906             base::TimeDelta::FromMicroseconds(timestamp_usec);
 907
 908         // Get the ID of the client that this visit came from.
 909         std::string client_id;
 910         id->GetString("client_id", &client_id);
 911
 912         web_history_query_results_.push_back(
 913             HistoryEntry(
 914                 HistoryEntry::REMOTE_ENTRY,
 915                 GURL(url),
 916                 title,
 917                 time,
 918                 client_id,
 919                 !search_text.empty(),
 920                 base::string16(),
 921                 /* blocked_visit */ false,
 922                 accept_languages));
 923       }
 924     }
 925   } else if (results_value) {
 926     NOTREACHED() << "Failed to parse JSON response.";
 927   }
 928   results_info_value_.SetBoolean("hasSyncedResults", results_value != NULL);
 929   if (!query_task_tracker_.HasTrackedTasks())
 930     ReturnResultsToFrontEnd();
 931 }
 932
 933 void BrowsingHistoryHandler::RemoveComplete() {
 934   urls_to_be_deleted_.clear();
 935
 936   // Notify the page that the deletion request is complete, but only if a web
 937   // history delete request is not still pending.
 938   if (!has_pending_delete_request_)
 939     web_ui()->CallJavascriptFunction("deleteComplete");
 940 }
 941
 942 void BrowsingHistoryHandler::RemoveWebHistoryComplete(bool success) {
 943   has_pending_delete_request_ = false;
 944   // TODO(dubroy): Should we handle failure somehow? Delete directives will
 945   // ensure that the visits are eventually deleted, so maybe it's not necessary.
 946   if (!delete_task_tracker_.HasTrackedTasks())
 947     RemoveComplete();
 948 }
 949
 950 void BrowsingHistoryHandler::SetQueryTimeInWeeks(
 951     int offset, history::QueryOptions* options) {
 952   // LocalMidnight returns the beginning of the current day so get the
 953   // beginning of the next one.
 954   base::Time midnight = base::Time::Now().LocalMidnight() +
 955                               base::TimeDelta::FromDays(1);
 956   options->end_time = midnight -
 957       base::TimeDelta::FromDays(7 * offset);
 958   options->begin_time = midnight -
 959       base::TimeDelta::FromDays(7 * (offset + 1));
 960 }
 961
 962 void BrowsingHistoryHandler::SetQueryTimeInMonths(
 963     int offset, history::QueryOptions* options) {
 964   // Configure the begin point of the search to the start of the
 965   // current month.
 966   base::Time::Exploded exploded;
 967   base::Time::Now().LocalMidnight().LocalExplode(&exploded);
 968   exploded.day_of_month = 1;
 969
 970   if (offset == 0) {
 971     options->begin_time = base::Time::FromLocalExploded(exploded);
 972
 973     // Set the end time of this first search to null (which will
 974     // show results from the future, should the user's clock have
 975     // been set incorrectly).
 976     options->end_time = base::Time();
 977   } else {
 978     // Go back |offset| months in the past. The end time is not inclusive, so
 979     // use the first day of the |offset| - 1 and |offset| months (e.g. for
 980     // the last month, |offset| = 1, use the first days of the last month and
 981     // the current month.
 982     exploded.month -= offset - 1;
 983     // Set the correct year.
 984     normalizeMonths(&exploded);
 985     options->end_time = base::Time::FromLocalExploded(exploded);
 986
 987     exploded.month -= 1;
 988     // Set the correct year
 989     normalizeMonths(&exploded);
 990     options->begin_time = base::Time::FromLocalExploded(exploded);
 991   }
 992 }
 993
 994 // Helper function for Observe that determines if there are any differences
 995 // between the URLs noticed for deletion and the ones we are expecting.
 996 static bool DeletionsDiffer(const history::URLRows& deleted_rows,
 997                             const std::set<GURL>& urls_to_be_deleted) {
 998   if (deleted_rows.size() != urls_to_be_deleted.size())
 999     return true;
1000   for (const auto& i : deleted_rows) {
1001     if (urls_to_be_deleted.find(i.url()) == urls_to_be_deleted.end())
1002       return true;
1003   }
1004   return false;
1005 }
1006
1007 std::string BrowsingHistoryHandler::GetAcceptLanguages() const {
1008   Profile* profile = Profile::FromWebUI(web_ui());
1009   return profile->GetPrefs()->GetString(prefs::kAcceptLanguages);
1010 }
1011
1012 void BrowsingHistoryHandler::OnURLsDeleted(
1013     history::HistoryService* history_service,
1014     bool all_history,
1015     bool expired,
1016     const history::URLRows& deleted_rows,
1017     const std::set<GURL>& favicon_urls) {
1018   if (all_history || DeletionsDiffer(deleted_rows, urls_to_be_deleted_))
1019     web_ui()->CallJavascriptFunction("historyDeleted");
1020 }
1021
1022 ////////////////////////////////////////////////////////////////////////////////
1023 //
1024 // HistoryUI
1025 //
1026 ////////////////////////////////////////////////////////////////////////////////
1027
1028 HistoryUI::HistoryUI(content::WebUI* web_ui) : WebUIController(web_ui) {
1029   web_ui->AddMessageHandler(new BrowsingHistoryHandler());
1030   web_ui->AddMessageHandler(new MetricsHandler());
1031
1032   // On mobile we deal with foreign sessions differently.
1033 #if !defined(OS_ANDROID) && !defined(OS_IOS)
1034   if (chrome::IsInstantExtendedAPIEnabled()) {
1035     web_ui->AddMessageHandler(new browser_sync::ForeignSessionHandler());
1036     web_ui->AddMessageHandler(new HistoryLoginHandler());
1037   }
1038 #endif
1039
1040   // Set up the chrome://history-frame/ source.
1041   Profile* profile = Profile::FromWebUI(web_ui);
1042   content::WebUIDataSource::Add(profile, CreateHistoryUIHTMLSource(profile));
1043 }
1044
1045 HistoryUI::~HistoryUI() {}
1046
1047 // static
1048 base::RefCountedMemory* HistoryUI::GetFaviconResourceBytes(
1049       ui::ScaleFactor scale_factor) {
1050   return ResourceBundle::GetSharedInstance().
1051       LoadDataResourceBytesForScale(IDR_HISTORY_FAVICON, scale_factor);
1052 }