chrome/common/localized_error.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/common/localized_error.h"
   6
   7 #include "base/command_line.h"
   8 #include "base/i18n/rtl.h"
   9 #include "base/logging.h"
  10 #include "base/metrics/field_trial.h"
  11 #include "base/strings/string16.h"
  12 #include "base/strings/string_number_conversions.h"
  13 #include "base/strings/string_util.h"
  14 #include "base/strings/utf_string_conversions.h"
  15 #include "base/values.h"
  16 #include "chrome/common/chrome_switches.h"
  17 #include "chrome/grit/chromium_strings.h"
  18 #include "chrome/grit/generated_resources.h"
  19 #include "components/error_page/common/error_page_params.h"
  20 #include "components/error_page/common/net_error_info.h"
  21 #include "components/url_formatter/url_formatter.h"
  22 #include "net/base/escape.h"
  23 #include "net/base/net_errors.h"
  24 #include "third_party/WebKit/public/platform/WebURLError.h"
  25 #include "ui/base/l10n/l10n_util.h"
  26 #include "ui/base/webui/web_ui_util.h"
  27
  28 #if defined(OS_WIN)
  29 #include "base/win/windows_version.h"
  30 #endif
  31
  32 #if defined(OS_CHROMEOS)
  33 #include "base/command_line.h"
  34 #include "chrome/common/chrome_switches.h"
  35 #endif
  36
  37 using blink::WebURLError;
  38
  39 // Some error pages have no details.
  40 const unsigned int kErrorPagesNoDetails = 0;
  41
  42 namespace {
  43
  44 static const char kRedirectLoopLearnMoreUrl[] =
  45     "https://support.google.com/chrome/answer/95626";
  46 static const char kWeakDHKeyLearnMoreUrl[] =
  47     "https://www.chromium.org/administrators/"
  48     "err_ssl_weak_server_ephemeral_dh_key";
  49 static const char kCachedCopyButtonFieldTrial[] =
  50     "EnableGoogleCachedCopyTextExperiment";
  51 static const char kCachedCopyButtonExpTypeControl[] = "control";
  52 static const char kCachedCopyButtonExpTypeCopy[] = "copy";
  53 static const int kGoogleCachedCopySuggestionType = 0;
  54
  55 enum NAV_SUGGESTIONS {
  56   SUGGEST_NONE                  = 0,
  57   SUGGEST_RELOAD                = 1 << 0,
  58   SUGGEST_CHECK_CONNECTION      = 1 << 1,
  59   SUGGEST_DNS_CONFIG            = 1 << 2,
  60   SUGGEST_FIREWALL_CONFIG       = 1 << 3,
  61   SUGGEST_PROXY_CONFIG          = 1 << 4,
  62   SUGGEST_DISABLE_EXTENSION     = 1 << 5,
  63   SUGGEST_LEARNMORE             = 1 << 6,
  64   SUGGEST_VIEW_POLICIES         = 1 << 7,
  65   SUGGEST_CONTACT_ADMINISTRATOR = 1 << 8,
  66 };
  67
  68 struct LocalizedErrorMap {
  69   int error_code;
  70   unsigned int title_resource_id;
  71   unsigned int heading_resource_id;
  72   // Detailed summary used when the error is in the main frame.
  73   unsigned int summary_resource_id;
  74   // Short one sentence description shown on mouse over when the error is in
  75   // a frame.
  76   unsigned int details_resource_id;
  77   int suggestions;  // Bitmap of SUGGEST_* values.
  78 };
  79
  80 const LocalizedErrorMap net_error_options[] = {
  81   {net::ERR_TIMED_OUT,
  82    IDS_ERRORPAGES_TITLE_NOT_AVAILABLE,
  83    IDS_ERRORPAGES_HEADING_NOT_AVAILABLE,
  84    IDS_ERRORPAGES_SUMMARY_TIMED_OUT,
  85    IDS_ERRORPAGES_DETAILS_TIMED_OUT,
  86    SUGGEST_RELOAD | SUGGEST_CHECK_CONNECTION | SUGGEST_FIREWALL_CONFIG |
  87        SUGGEST_PROXY_CONFIG,
  88   },
  89   {net::ERR_CONNECTION_TIMED_OUT,
  90    IDS_ERRORPAGES_TITLE_NOT_AVAILABLE,
  91    IDS_ERRORPAGES_HEADING_NOT_AVAILABLE,
  92    IDS_ERRORPAGES_SUMMARY_TIMED_OUT,
  93    IDS_ERRORPAGES_DETAILS_TIMED_OUT,
  94    SUGGEST_RELOAD | SUGGEST_CHECK_CONNECTION | SUGGEST_FIREWALL_CONFIG |
  95        SUGGEST_PROXY_CONFIG,
  96   },
  97   {net::ERR_CONNECTION_CLOSED,
  98    IDS_ERRORPAGES_TITLE_NOT_AVAILABLE,
  99    IDS_ERRORPAGES_HEADING_NOT_AVAILABLE,
 100    IDS_ERRORPAGES_SUMMARY_NOT_AVAILABLE,
 101    IDS_ERRORPAGES_DETAILS_CONNECTION_CLOSED,
 102    SUGGEST_RELOAD,
 103   },
 104   {net::ERR_CONNECTION_RESET,
 105    IDS_ERRORPAGES_TITLE_NOT_AVAILABLE,
 106    IDS_ERRORPAGES_HEADING_NOT_AVAILABLE,
 107    IDS_ERRORPAGES_SUMMARY_CONNECTION_RESET,
 108    IDS_ERRORPAGES_DETAILS_CONNECTION_RESET,
 109    SUGGEST_RELOAD | SUGGEST_CHECK_CONNECTION | SUGGEST_FIREWALL_CONFIG |
 110        SUGGEST_PROXY_CONFIG,
 111   },
 112   {net::ERR_CONNECTION_REFUSED,
 113    IDS_ERRORPAGES_TITLE_NOT_AVAILABLE,
 114    IDS_ERRORPAGES_HEADING_NOT_AVAILABLE,
 115    IDS_ERRORPAGES_SUMMARY_CONNECTION_REFUSED,
 116    IDS_ERRORPAGES_DETAILS_CONNECTION_REFUSED,
 117    SUGGEST_RELOAD | SUGGEST_CHECK_CONNECTION | SUGGEST_FIREWALL_CONFIG |
 118        SUGGEST_PROXY_CONFIG,
 119   },
 120   {net::ERR_CONNECTION_FAILED,
 121    IDS_ERRORPAGES_TITLE_NOT_AVAILABLE,
 122    IDS_ERRORPAGES_HEADING_NOT_AVAILABLE,
 123    IDS_ERRORPAGES_SUMMARY_NOT_AVAILABLE,
 124    IDS_ERRORPAGES_DETAILS_CONNECTION_FAILED,
 125    SUGGEST_RELOAD,
 126   },
 127   {net::ERR_NAME_NOT_RESOLVED,
 128    IDS_ERRORPAGES_TITLE_NOT_AVAILABLE,
 129    IDS_ERRORPAGES_HEADING_NOT_AVAILABLE,
 130    IDS_ERRORPAGES_SUMMARY_NAME_NOT_RESOLVED,
 131    IDS_ERRORPAGES_DETAILS_NAME_NOT_RESOLVED,
 132    SUGGEST_RELOAD | SUGGEST_CHECK_CONNECTION | SUGGEST_DNS_CONFIG |
 133        SUGGEST_FIREWALL_CONFIG | SUGGEST_PROXY_CONFIG,
 134   },
 135   {net::ERR_ICANN_NAME_COLLISION,
 136    IDS_ERRORPAGES_TITLE_NOT_AVAILABLE,
 137    IDS_ERRORPAGES_HEADING_NOT_AVAILABLE,
 138    IDS_ERRORPAGES_SUMMARY_ICANN_NAME_COLLISION,
 139    IDS_ERRORPAGES_DETAILS_ICANN_NAME_COLLISION,
 140    SUGGEST_NONE,
 141   },
 142   {net::ERR_ADDRESS_UNREACHABLE,
 143    IDS_ERRORPAGES_TITLE_NOT_AVAILABLE,
 144    IDS_ERRORPAGES_HEADING_NOT_AVAILABLE,
 145    IDS_ERRORPAGES_SUMMARY_ADDRESS_UNREACHABLE,
 146    IDS_ERRORPAGES_DETAILS_ADDRESS_UNREACHABLE,
 147    SUGGEST_RELOAD | SUGGEST_FIREWALL_CONFIG | SUGGEST_PROXY_CONFIG,
 148   },
 149   {net::ERR_NETWORK_ACCESS_DENIED,
 150    IDS_ERRORPAGES_TITLE_NOT_AVAILABLE,
 151    IDS_ERRORPAGES_HEADING_NETWORK_ACCESS_DENIED,
 152    IDS_ERRORPAGES_SUMMARY_NETWORK_ACCESS_DENIED,
 153    IDS_ERRORPAGES_DETAILS_NETWORK_ACCESS_DENIED,
 154    SUGGEST_FIREWALL_CONFIG,
 155   },
 156   {net::ERR_PROXY_CONNECTION_FAILED,
 157    IDS_ERRORPAGES_TITLE_NOT_AVAILABLE,
 158    IDS_ERRORPAGES_HEADING_PROXY_CONNECTION_FAILED,
 159    IDS_ERRORPAGES_SUMMARY_PROXY_CONNECTION_FAILED,
 160    IDS_ERRORPAGES_DETAILS_PROXY_CONNECTION_FAILED,
 161    SUGGEST_PROXY_CONFIG,
 162   },
 163   {net::ERR_INTERNET_DISCONNECTED,
 164    IDS_ERRORPAGES_TITLE_NOT_AVAILABLE,
 165    IDS_ERRORPAGES_HEADING_INTERNET_DISCONNECTED,
 166    IDS_ERRORPAGES_SUMMARY_INTERNET_DISCONNECTED,
 167    IDS_ERRORPAGES_DETAILS_INTERNET_DISCONNECTED,
 168    SUGGEST_NONE,
 169   },
 170   {net::ERR_FILE_NOT_FOUND,
 171    IDS_ERRORPAGES_TITLE_NOT_FOUND,
 172    IDS_ERRORPAGES_HEADING_NOT_FOUND,
 173    IDS_ERRORPAGES_SUMMARY_NOT_FOUND,
 174    IDS_ERRORPAGES_DETAILS_FILE_NOT_FOUND,
 175    SUGGEST_NONE,
 176   },
 177   {net::ERR_CACHE_MISS,
 178    IDS_ERRORPAGES_TITLE_LOAD_FAILED,
 179    IDS_ERRORPAGES_HEADING_CACHE_MISS,
 180    IDS_ERRORPAGES_SUMMARY_CACHE_MISS,
 181    IDS_ERRORPAGES_DETAILS_CACHE_MISS,
 182    SUGGEST_RELOAD,
 183   },
 184   {net::ERR_CACHE_READ_FAILURE,
 185    IDS_ERRORPAGES_TITLE_LOAD_FAILED,
 186    IDS_ERRORPAGES_HEADING_CACHE_READ_FAILURE,
 187    IDS_ERRORPAGES_SUMMARY_CACHE_READ_FAILURE,
 188    IDS_ERRORPAGES_DETAILS_CACHE_READ_FAILURE,
 189    SUGGEST_RELOAD,
 190   },
 191   {net::ERR_NETWORK_IO_SUSPENDED,
 192    IDS_ERRORPAGES_TITLE_LOAD_FAILED,
 193    IDS_ERRORPAGES_HEADING_NETWORK_IO_SUSPENDED,
 194    IDS_ERRORPAGES_SUMMARY_NETWORK_IO_SUSPENDED,
 195    IDS_ERRORPAGES_DETAILS_NETWORK_IO_SUSPENDED,
 196    SUGGEST_RELOAD,
 197   },
 198   {net::ERR_TOO_MANY_REDIRECTS,
 199    IDS_ERRORPAGES_TITLE_LOAD_FAILED,
 200    IDS_ERRORPAGES_HEADING_TOO_MANY_REDIRECTS,
 201    IDS_ERRORPAGES_SUMMARY_TOO_MANY_REDIRECTS,
 202    IDS_ERRORPAGES_DETAILS_TOO_MANY_REDIRECTS,
 203    SUGGEST_RELOAD | SUGGEST_LEARNMORE,
 204   },
 205   {net::ERR_EMPTY_RESPONSE,
 206    IDS_ERRORPAGES_TITLE_LOAD_FAILED,
 207    IDS_ERRORPAGES_HEADING_EMPTY_RESPONSE,
 208    IDS_ERRORPAGES_SUMMARY_EMPTY_RESPONSE,
 209    IDS_ERRORPAGES_DETAILS_EMPTY_RESPONSE,
 210    SUGGEST_RELOAD,
 211   },
 212   {net::ERR_RESPONSE_HEADERS_MULTIPLE_CONTENT_LENGTH,
 213    IDS_ERRORPAGES_TITLE_LOAD_FAILED,
 214    IDS_ERRORPAGES_HEADING_DUPLICATE_HEADERS,
 215    IDS_ERRORPAGES_SUMMARY_DUPLICATE_HEADERS,
 216    IDS_ERRORPAGES_DETAILS_RESPONSE_HEADERS_MULTIPLE_CONTENT_LENGTH,
 217    SUGGEST_NONE,
 218   },
 219   {net::ERR_RESPONSE_HEADERS_MULTIPLE_CONTENT_DISPOSITION,
 220    IDS_ERRORPAGES_TITLE_LOAD_FAILED,
 221    IDS_ERRORPAGES_HEADING_DUPLICATE_HEADERS,
 222    IDS_ERRORPAGES_SUMMARY_DUPLICATE_HEADERS,
 223    IDS_ERRORPAGES_DETAILS_RESPONSE_HEADERS_MULTIPLE_CONTENT_DISPOSITION,
 224    SUGGEST_NONE,
 225   },
 226   {net::ERR_RESPONSE_HEADERS_MULTIPLE_LOCATION,
 227    IDS_ERRORPAGES_TITLE_LOAD_FAILED,
 228    IDS_ERRORPAGES_HEADING_DUPLICATE_HEADERS,
 229    IDS_ERRORPAGES_SUMMARY_DUPLICATE_HEADERS,
 230    IDS_ERRORPAGES_DETAILS_RESPONSE_HEADERS_MULTIPLE_LOCATION,
 231    SUGGEST_NONE,
 232   },
 233   {net::ERR_CONTENT_LENGTH_MISMATCH,
 234    IDS_ERRORPAGES_TITLE_NOT_AVAILABLE,
 235    IDS_ERRORPAGES_HEADING_NOT_AVAILABLE,
 236    IDS_ERRORPAGES_SUMMARY_NOT_AVAILABLE,
 237    IDS_ERRORPAGES_DETAILS_CONNECTION_CLOSED,
 238    SUGGEST_RELOAD,
 239   },
 240   {net::ERR_INCOMPLETE_CHUNKED_ENCODING,
 241    IDS_ERRORPAGES_TITLE_NOT_AVAILABLE,
 242    IDS_ERRORPAGES_HEADING_NOT_AVAILABLE,
 243    IDS_ERRORPAGES_SUMMARY_NOT_AVAILABLE,
 244    IDS_ERRORPAGES_DETAILS_CONNECTION_CLOSED,
 245    SUGGEST_RELOAD,
 246   },
 247   {net::ERR_SSL_PROTOCOL_ERROR,
 248    IDS_ERRORPAGES_TITLE_LOAD_FAILED,
 249    IDS_ERRORPAGES_HEADING_SSL_PROTOCOL_ERROR,
 250    IDS_ERRORPAGES_SUMMARY_SSL_PROTOCOL_ERROR,
 251    IDS_ERRORPAGES_DETAILS_SSL_PROTOCOL_ERROR,
 252    SUGGEST_NONE,
 253   },
 254   {net::ERR_BAD_SSL_CLIENT_AUTH_CERT,
 255    IDS_ERRORPAGES_TITLE_LOAD_FAILED,
 256    IDS_ERRORPAGES_HEADING_BAD_SSL_CLIENT_AUTH_CERT,
 257    IDS_ERRORPAGES_SUMMARY_BAD_SSL_CLIENT_AUTH_CERT,
 258    IDS_ERRORPAGES_DETAILS_BAD_SSL_CLIENT_AUTH_CERT,
 259    SUGGEST_NONE,
 260   },
 261   {net::ERR_SSL_WEAK_SERVER_EPHEMERAL_DH_KEY,
 262    IDS_ERRORPAGES_TITLE_LOAD_FAILED,
 263    IDS_ERRORPAGES_HEADING_WEAK_SERVER_EPHEMERAL_DH_KEY,
 264    IDS_ERRORPAGES_SUMMARY_WEAK_SERVER_EPHEMERAL_DH_KEY,
 265    IDS_ERRORPAGES_DETAILS_SSL_PROTOCOL_ERROR,
 266    SUGGEST_LEARNMORE,
 267   },
 268   {net::ERR_SSL_PINNED_KEY_NOT_IN_CERT_CHAIN,
 269    IDS_ERRORPAGES_TITLE_LOAD_FAILED,
 270    IDS_ERRORPAGES_HEADING_PINNING_FAILURE,
 271    IDS_ERRORPAGES_SUMMARY_PINNING_FAILURE,
 272    IDS_ERRORPAGES_DETAILS_PINNING_FAILURE,
 273    SUGGEST_NONE,
 274   },
 275   {net::ERR_TEMPORARILY_THROTTLED,
 276    IDS_ERRORPAGES_TITLE_ACCESS_DENIED,
 277    IDS_ERRORPAGES_HEADING_ACCESS_DENIED,
 278    IDS_ERRORPAGES_SUMMARY_TEMPORARILY_THROTTLED,
 279    IDS_ERRORPAGES_DETAILS_TEMPORARILY_THROTTLED,
 280    SUGGEST_NONE,
 281   },
 282   {net::ERR_BLOCKED_BY_CLIENT,
 283    IDS_ERRORPAGES_TITLE_BLOCKED,
 284    IDS_ERRORPAGES_HEADING_BLOCKED,
 285    IDS_ERRORPAGES_SUMMARY_BLOCKED,
 286    IDS_ERRORPAGES_DETAILS_BLOCKED,
 287    SUGGEST_RELOAD | SUGGEST_DISABLE_EXTENSION,
 288   },
 289   {net::ERR_NETWORK_CHANGED,
 290    IDS_ERRORPAGES_TITLE_LOAD_FAILED,
 291    IDS_ERRORPAGES_HEADING_NETWORK_ACCESS_DENIED,
 292    IDS_ERRORPAGES_SUMMARY_NETWORK_CHANGED,
 293    IDS_ERRORPAGES_DETAILS_NETWORK_CHANGED,
 294    SUGGEST_RELOAD | SUGGEST_CHECK_CONNECTION,
 295   },
 296   {net::ERR_BLOCKED_BY_ADMINISTRATOR,
 297    IDS_ERRORPAGES_TITLE_BLOCKED,
 298    IDS_ERRORPAGES_HEADING_BLOCKED_BY_ADMINISTRATOR,
 299    IDS_ERRORPAGES_SUMMARY_BLOCKED_BY_ADMINISTRATOR,
 300    IDS_ERRORPAGES_DETAILS_BLOCKED_BY_ADMINISTRATOR,
 301    SUGGEST_VIEW_POLICIES | SUGGEST_CONTACT_ADMINISTRATOR,
 302   },
 303   {net::ERR_BLOCKED_ENROLLMENT_CHECK_PENDING,
 304    IDS_ERRORPAGES_TITLE_BLOCKED,
 305    IDS_ERRORPAGES_HEADING_BLOCKED_BY_ADMINISTRATOR,
 306    IDS_ERRORPAGES_SUMMARY_BLOCKED_ENROLLMENT_CHECK_PENDING,
 307    IDS_ERRORPAGES_DETAILS_BLOCKED_ENROLLMENT_CHECK_PENDING,
 308    SUGGEST_CHECK_CONNECTION,
 309   },
 310   {net::ERR_SSL_FALLBACK_BEYOND_MINIMUM_VERSION,
 311    IDS_ERRORPAGES_TITLE_LOAD_FAILED,
 312    IDS_ERRORPAGES_HEADING_SSL_FALLBACK_BEYOND_MINIMUM_VERSION,
 313    IDS_ERRORPAGES_SUMMARY_SSL_FALLBACK_BEYOND_MINIMUM_VERSION,
 314    IDS_ERRORPAGES_DETAILS_SSL_FALLBACK_BEYOND_MINIMUM_VERSION,
 315    SUGGEST_NONE,
 316   },
 317   {net::ERR_SSL_VERSION_OR_CIPHER_MISMATCH,
 318    IDS_ERRORPAGES_TITLE_LOAD_FAILED,
 319    IDS_ERRORPAGES_HEADING_SSL_VERSION_OR_CIPHER_MISMATCH,
 320    IDS_ERRORPAGES_SUMMARY_SSL_VERSION_OR_CIPHER_MISMATCH,
 321    IDS_ERRORPAGES_DETAILS_SSL_VERSION_OR_CIPHER_MISMATCH,
 322    SUGGEST_NONE,
 323   },
 324   {net::ERR_TEMPORARY_BACKOFF,
 325    IDS_ERRORPAGES_TITLE_ACCESS_DENIED,
 326    IDS_ERRORPAGES_HEADING_ACCESS_DENIED,
 327    IDS_ERRORPAGES_SUMMARY_TEMPORARY_BACKOFF,
 328    IDS_ERRORPAGES_DETAILS_TEMPORARY_BACKOFF,
 329    SUGGEST_NONE,
 330   },
 331   {net::ERR_SSL_SERVER_CERT_BAD_FORMAT,
 332    IDS_ERRORPAGES_TITLE_LOAD_FAILED,
 333    IDS_ERRORPAGES_HEADING_SSL_PROTOCOL_ERROR,
 334    IDS_ERRORPAGES_SUMMARY_SSL_PROTOCOL_ERROR,
 335    IDS_ERRORPAGES_DETAILS_SSL_PROTOCOL_ERROR,
 336    SUGGEST_NONE,
 337   },
 338 };
 339
 340 // Special error page to be used in the case of navigating back to a page
 341 // generated by a POST.  LocalizedError::HasStrings expects this net error code
 342 // to also appear in the array above.
 343 const LocalizedErrorMap repost_error = {
 344   net::ERR_CACHE_MISS,
 345   IDS_ERRORPAGES_TITLE_NOT_AVAILABLE,
 346   IDS_HTTP_POST_WARNING_TITLE,
 347   IDS_ERRORPAGES_HTTP_POST_WARNING,
 348   IDS_ERRORPAGES_DETAILS_CACHE_MISS,
 349   SUGGEST_RELOAD,
 350 };
 351
 352 const LocalizedErrorMap http_error_options[] = {
 353   {403,
 354    IDS_ERRORPAGES_TITLE_ACCESS_DENIED,
 355    IDS_ERRORPAGES_HEADING_ACCESS_DENIED,
 356    IDS_ERRORPAGES_SUMMARY_FORBIDDEN,
 357    IDS_ERRORPAGES_DETAILS_FORBIDDEN,
 358    SUGGEST_NONE,
 359   },
 360   {410,
 361    IDS_ERRORPAGES_TITLE_NOT_FOUND,
 362    IDS_ERRORPAGES_HEADING_NOT_FOUND,
 363    IDS_ERRORPAGES_SUMMARY_GONE,
 364    IDS_ERRORPAGES_DETAILS_GONE,
 365    SUGGEST_NONE,
 366   },
 367
 368   {500,
 369    IDS_ERRORPAGES_TITLE_LOAD_FAILED,
 370    IDS_ERRORPAGES_HEADING_HTTP_SERVER_ERROR,
 371    IDS_ERRORPAGES_SUMMARY_INTERNAL_SERVER_ERROR,
 372    IDS_ERRORPAGES_DETAILS_INTERNAL_SERVER_ERROR,
 373    SUGGEST_RELOAD,
 374   },
 375   {501,
 376    IDS_ERRORPAGES_TITLE_LOAD_FAILED,
 377    IDS_ERRORPAGES_HEADING_HTTP_SERVER_ERROR,
 378    IDS_ERRORPAGES_SUMMARY_WEBSITE_CANNOT_HANDLE,
 379    IDS_ERRORPAGES_DETAILS_NOT_IMPLEMENTED,
 380    SUGGEST_NONE,
 381   },
 382   {502,
 383    IDS_ERRORPAGES_TITLE_LOAD_FAILED,
 384    IDS_ERRORPAGES_HEADING_HTTP_SERVER_ERROR,
 385    IDS_ERRORPAGES_SUMMARY_BAD_GATEWAY,
 386    IDS_ERRORPAGES_DETAILS_BAD_GATEWAY,
 387    SUGGEST_RELOAD,
 388   },
 389   {503,
 390    IDS_ERRORPAGES_TITLE_LOAD_FAILED,
 391    IDS_ERRORPAGES_HEADING_HTTP_SERVER_ERROR,
 392    IDS_ERRORPAGES_SUMMARY_SERVICE_UNAVAILABLE,
 393    IDS_ERRORPAGES_DETAILS_SERVICE_UNAVAILABLE,
 394    SUGGEST_RELOAD,
 395   },
 396   {504,
 397    IDS_ERRORPAGES_TITLE_LOAD_FAILED,
 398    IDS_ERRORPAGES_HEADING_HTTP_SERVER_ERROR,
 399    IDS_ERRORPAGES_SUMMARY_GATEWAY_TIMEOUT,
 400    IDS_ERRORPAGES_DETAILS_GATEWAY_TIMEOUT,
 401    SUGGEST_RELOAD,
 402   },
 403   {505,
 404    IDS_ERRORPAGES_TITLE_LOAD_FAILED,
 405    IDS_ERRORPAGES_HEADING_HTTP_SERVER_ERROR,
 406    IDS_ERRORPAGES_SUMMARY_WEBSITE_CANNOT_HANDLE,
 407    IDS_ERRORPAGES_DETAILS_HTTP_VERSION_NOT_SUPPORTED,
 408    SUGGEST_NONE,
 409   },
 410 };
 411
 412 const LocalizedErrorMap dns_probe_error_options[] = {
 413   {error_page::DNS_PROBE_POSSIBLE,
 414    IDS_ERRORPAGES_TITLE_NOT_AVAILABLE,
 415    IDS_ERRORPAGES_HEADING_NOT_AVAILABLE,
 416    IDS_ERRORPAGES_SUMMARY_DNS_PROBE_RUNNING,
 417    IDS_ERRORPAGES_DETAILS_DNS_PROBE_RUNNING,
 418    SUGGEST_RELOAD,
 419   },
 420
 421   // DNS_PROBE_NOT_RUN is not here; NetErrorHelper will restore the original
 422   // error, which might be one of several DNS-related errors.
 423
 424   {error_page::DNS_PROBE_STARTED,
 425    IDS_ERRORPAGES_TITLE_NOT_AVAILABLE,
 426    IDS_ERRORPAGES_HEADING_NOT_AVAILABLE,
 427    IDS_ERRORPAGES_SUMMARY_DNS_PROBE_RUNNING,
 428    IDS_ERRORPAGES_DETAILS_DNS_PROBE_RUNNING,
 429    // Include SUGGEST_RELOAD so the More button doesn't jump when we update.
 430    SUGGEST_RELOAD,
 431   },
 432
 433   // DNS_PROBE_FINISHED_UNKNOWN is not here; NetErrorHelper will restore the
 434   // original error, which might be one of several DNS-related errors.
 435
 436   {error_page::DNS_PROBE_FINISHED_NO_INTERNET,
 437    IDS_ERRORPAGES_TITLE_NOT_AVAILABLE,
 438    IDS_ERRORPAGES_HEADING_INTERNET_DISCONNECTED,
 439    IDS_ERRORPAGES_SUMMARY_INTERNET_DISCONNECTED,
 440    IDS_ERRORPAGES_DETAILS_INTERNET_DISCONNECTED,
 441    SUGGEST_RELOAD | SUGGEST_CHECK_CONNECTION | SUGGEST_FIREWALL_CONFIG,
 442   },
 443   {error_page::DNS_PROBE_FINISHED_BAD_CONFIG,
 444    IDS_ERRORPAGES_TITLE_NOT_AVAILABLE,
 445    IDS_ERRORPAGES_HEADING_NOT_AVAILABLE,
 446    IDS_ERRORPAGES_SUMMARY_NAME_NOT_RESOLVED,
 447    IDS_ERRORPAGES_DETAILS_NAME_NOT_RESOLVED,
 448    SUGGEST_RELOAD | SUGGEST_DNS_CONFIG | SUGGEST_FIREWALL_CONFIG,
 449   },
 450   {error_page::DNS_PROBE_FINISHED_NXDOMAIN,
 451    IDS_ERRORPAGES_TITLE_NOT_AVAILABLE,
 452    IDS_ERRORPAGES_HEADING_NOT_AVAILABLE,
 453    IDS_ERRORPAGES_SUMMARY_NAME_NOT_RESOLVED,
 454    IDS_ERRORPAGES_DETAILS_NAME_NOT_RESOLVED,
 455    SUGGEST_RELOAD,
 456   },
 457 };
 458
 459 const LocalizedErrorMap* FindErrorMapInArray(const LocalizedErrorMap* maps,
 460                                                    size_t num_maps,
 461                                                    int error_code) {
 462   for (size_t i = 0; i < num_maps; ++i) {
 463     if (maps[i].error_code == error_code)
 464       return &maps[i];
 465   }
 466   return NULL;
 467 }
 468
 469 const LocalizedErrorMap* LookupErrorMap(const std::string& error_domain,
 470                                         int error_code, bool is_post) {
 471   if (error_domain == net::kErrorDomain) {
 472     // Display a different page in the special case of navigating through the
 473     // history to an uncached page created by a POST.
 474     if (is_post && error_code == net::ERR_CACHE_MISS)
 475       return &repost_error;
 476     return FindErrorMapInArray(net_error_options,
 477                                arraysize(net_error_options),
 478                                error_code);
 479   } else if (error_domain == LocalizedError::kHttpErrorDomain) {
 480     return FindErrorMapInArray(http_error_options,
 481                                arraysize(http_error_options),
 482                                error_code);
 483   } else if (error_domain == error_page::kDnsProbeErrorDomain) {
 484     const LocalizedErrorMap* map =
 485         FindErrorMapInArray(dns_probe_error_options,
 486                             arraysize(dns_probe_error_options),
 487                             error_code);
 488     DCHECK(map);
 489     return map;
 490   } else {
 491     NOTREACHED();
 492     return NULL;
 493   }
 494 }
 495
 496 // Returns a dictionary containing the strings for the settings menu under the
 497 // wrench, and the advanced settings button.
 498 base::DictionaryValue* GetStandardMenuItemsText() {
 499   base::DictionaryValue* standard_menu_items_text = new base::DictionaryValue();
 500   standard_menu_items_text->SetString("settingsTitle",
 501       l10n_util::GetStringUTF16(IDS_SETTINGS_TITLE));
 502   standard_menu_items_text->SetString("advancedTitle",
 503       l10n_util::GetStringUTF16(IDS_SETTINGS_SHOW_ADVANCED_SETTINGS));
 504   return standard_menu_items_text;
 505 }
 506
 507 // Gets the icon class for a given |error_domain| and |error_code|.
 508 const char* GetIconClassForError(const std::string& error_domain,
 509                                  int error_code) {
 510   if ((error_code == net::ERR_INTERNET_DISCONNECTED &&
 511        error_domain == net::kErrorDomain) ||
 512       (error_code == error_page::DNS_PROBE_FINISHED_NO_INTERNET &&
 513        error_domain == error_page::kDnsProbeErrorDomain))
 514     return "icon-offline";
 515
 516   return "icon-generic";
 517 }
 518
 519 }  // namespace
 520
 521 const char LocalizedError::kHttpErrorDomain[] = "http";
 522
 523 void LocalizedError::GetStrings(int error_code,
 524                                 const std::string& error_domain,
 525                                 const GURL& failed_url,
 526                                 bool is_post,
 527                                 bool stale_copy_in_cache,
 528                                 bool can_show_network_diagnostics_dialog,
 529                                 const std::string& locale,
 530                                 const std::string& accept_languages,
 531                                 scoped_ptr<error_page::ErrorPageParams> params,
 532                                 base::DictionaryValue* error_strings) {
 533   webui::SetLoadTimeDataDefaults(locale, error_strings);
 534
 535   // Grab the strings and settings that depend on the error type.  Init
 536   // options with default values.
 537   LocalizedErrorMap options = {
 538     0,
 539     IDS_ERRORPAGES_TITLE_NOT_AVAILABLE,
 540     IDS_ERRORPAGES_HEADING_NOT_AVAILABLE,
 541     IDS_ERRORPAGES_SUMMARY_NOT_AVAILABLE,
 542     kErrorPagesNoDetails,
 543     SUGGEST_NONE,
 544   };
 545
 546   const LocalizedErrorMap* error_map = LookupErrorMap(error_domain, error_code,
 547                                                       is_post);
 548   if (error_map)
 549     options = *error_map;
 550
 551   // If we got "access denied" but the url was a file URL, then we say it was a
 552   // file instead of just using the "not available" default message. Just adding
 553   // ERR_ACCESS_DENIED to the map isn't sufficient, since that message may be
 554   // generated by some OSs when the operation doesn't involve a file URL.
 555   if (error_domain == net::kErrorDomain &&
 556       error_code == net::ERR_ACCESS_DENIED &&
 557       failed_url.scheme() == "file") {
 558     options.title_resource_id = IDS_ERRORPAGES_TITLE_ACCESS_DENIED;
 559     options.heading_resource_id = IDS_ERRORPAGES_HEADING_FILE_ACCESS_DENIED;
 560     options.summary_resource_id = IDS_ERRORPAGES_SUMMARY_FILE_ACCESS_DENIED;
 561     options.details_resource_id = IDS_ERRORPAGES_DETAILS_FILE_ACCESS_DENIED;
 562     options.suggestions = SUGGEST_NONE;
 563   }
 564
 565   base::string16 failed_url_string(url_formatter::FormatUrl(
 566       failed_url, accept_languages, url_formatter::kFormatUrlOmitNothing,
 567       net::UnescapeRule::NORMAL, nullptr, nullptr, nullptr));
 568   // URLs are always LTR.
 569   if (base::i18n::IsRTL())
 570     base::i18n::WrapStringWithLTRFormatting(&failed_url_string);
 571   error_strings->SetString("title",
 572       l10n_util::GetStringFUTF16(options.title_resource_id, failed_url_string));
 573   error_strings->SetString("heading",
 574       l10n_util::GetStringUTF16(options.heading_resource_id));
 575
 576   std::string icon_class = GetIconClassForError(error_domain, error_code);
 577   error_strings->SetString("iconClass", icon_class);
 578
 579   base::DictionaryValue* summary = new base::DictionaryValue;
 580
 581   // For offline show a summary message underneath the heading.
 582   if (error_code == net::ERR_INTERNET_DISCONNECTED ||
 583       error_code == error_page::DNS_PROBE_FINISHED_NO_INTERNET) {
 584     error_strings->SetString("primaryParagraph",
 585         l10n_util::GetStringUTF16(options.summary_resource_id));
 586
 587 #if defined(OS_CHROMEOS)
 588     base::CommandLine* command_line = base::CommandLine::ForCurrentProcess();
 589
 590     // Check if easter egg should be disabled.
 591     if (command_line->HasSwitch(switches::kDisableDinosaurEasterEgg)) {
 592       // The prescence of this string disables the easter egg. Acts as a flag.
 593       error_strings->SetString("disabledEasterEgg",
 594           l10n_util::GetStringUTF16(IDS_ERRORPAGE_FUN_DISABLED));
 595     }
 596 #endif
 597
 598   } else {
 599     // Set summary message in the details.
 600     summary->SetString("msg",
 601         l10n_util::GetStringUTF16(options.summary_resource_id));
 602   }
 603   summary->SetString("failedUrl", failed_url_string);
 604   summary->SetString("hostName", url_formatter::IDNToUnicode(failed_url.host(),
 605                                                              accept_languages));
 606   summary->SetString("productName",
 607                      l10n_util::GetStringUTF16(IDS_PRODUCT_NAME));
 608
 609   error_strings->SetString(
 610       "details", l10n_util::GetStringUTF16(IDS_ERRORPAGE_NET_BUTTON_DETAILS));
 611   error_strings->SetString(
 612       "hideDetails", l10n_util::GetStringUTF16(
 613           IDS_ERRORPAGE_NET_BUTTON_HIDE_DETAILS));
 614   error_strings->Set("summary", summary);
 615
 616   if (options.details_resource_id != kErrorPagesNoDetails) {
 617     error_strings->SetString(
 618         "errorDetails", l10n_util::GetStringUTF16(options.details_resource_id));
 619   }
 620
 621   base::string16 error_string;
 622   if (error_domain == net::kErrorDomain) {
 623     // Non-internationalized error string, for debugging Chrome itself.
 624     error_string = base::ASCIIToUTF16(net::ErrorToShortString(error_code));
 625   } else if (error_domain == error_page::kDnsProbeErrorDomain) {
 626     std::string ascii_error_string =
 627         error_page::DnsProbeStatusToString(error_code);
 628     error_string = base::ASCIIToUTF16(ascii_error_string);
 629   } else {
 630     DCHECK_EQ(LocalizedError::kHttpErrorDomain, error_domain);
 631     error_string = base::IntToString16(error_code);
 632   }
 633   error_strings->SetString("errorCode",
 634       l10n_util::GetStringFUTF16(IDS_ERRORPAGES_ERROR_CODE, error_string));
 635
 636   // Platform specific information for diagnosing network issues on OSX and
 637   // Windows.
 638 #if defined(OS_MACOSX) || defined(OS_WIN)
 639   if (error_domain == net::kErrorDomain &&
 640       error_code == net::ERR_INTERNET_DISCONNECTED) {
 641     int platform_string_id =
 642         IDS_ERRORPAGES_SUMMARY_INTERNET_DISCONNECTED_PLATFORM;
 643 #if defined(OS_WIN)
 644     // Different versions of Windows have different instructions.
 645     base::win::Version windows_version = base::win::GetVersion();
 646     if (windows_version < base::win::VERSION_VISTA) {
 647       // XP, XP64, and Server 2003.
 648       platform_string_id =
 649           IDS_ERRORPAGES_SUMMARY_INTERNET_DISCONNECTED_PLATFORM_XP;
 650     } else if (windows_version == base::win::VERSION_VISTA) {
 651       // Vista
 652       platform_string_id =
 653           IDS_ERRORPAGES_SUMMARY_INTERNET_DISCONNECTED_PLATFORM_VISTA;
 654     }
 655 #endif  // defined(OS_WIN)
 656     // Platform dependent portion of the summary section.
 657     summary->SetString("msg",
 658         l10n_util::GetStringFUTF16(
 659             IDS_ERRORPAGES_SUMMARY_INTERNET_DISCONNECTED_INSTRUCTIONS_TEMPLATE,
 660             l10n_util::GetStringUTF16(platform_string_id)));
 661   }
 662 #endif  // defined(OS_MACOSX) || defined(OS_WIN)
 663
 664   // If no parameters were provided, use the defaults.
 665   if (!params) {
 666     params.reset(new error_page::ErrorPageParams());
 667     params->suggest_reload = !!(options.suggestions & SUGGEST_RELOAD);
 668   }
 669
 670   base::ListValue* suggestions = NULL;
 671   bool use_default_suggestions = true;
 672   if (!params->override_suggestions) {
 673     suggestions = new base::ListValue();
 674   } else {
 675     suggestions = params->override_suggestions.release();
 676     use_default_suggestions = false;
 677     EnableGoogleCachedCopyButtonExperiment(suggestions, error_strings);
 678   }
 679
 680   error_strings->Set("suggestions", suggestions);
 681
 682   if (params->search_url.is_valid()) {
 683     error_strings->SetString("searchHeader",
 684         l10n_util::GetStringUTF16(IDS_ERRORPAGES_SUGGESTION_GOOGLE_SEARCH));
 685     error_strings->SetString("searchUrl", params->search_url.spec());
 686     error_strings->SetString("searchTerms", params->search_terms);
 687     error_strings->SetInteger("searchTrackingId", params->search_tracking_id);
 688   }
 689
 690   // Add the reload suggestion, if needed.
 691   if (params->suggest_reload) {
 692     if (!is_post) {
 693       base::DictionaryValue* reload_button = new base::DictionaryValue;
 694       reload_button->SetString(
 695           "msg", l10n_util::GetStringUTF16(IDS_ERRORPAGES_BUTTON_RELOAD));
 696       reload_button->SetString("reloadUrl", failed_url.spec());
 697       error_strings->Set("reloadButton", reload_button);
 698       reload_button->SetInteger("reloadTrackingId", params->reload_tracking_id);
 699     } else {
 700       // If the page was created by a post, it can't be reloaded in the same
 701       // way, so just add a suggestion instead.
 702       // TODO(mmenke):  Make the reload button bring up the repost confirmation
 703       //                dialog for pages resulting from posts.
 704       base::DictionaryValue* suggest_reload_repost = new base::DictionaryValue;
 705       suggest_reload_repost->SetString("header",
 706           l10n_util::GetStringUTF16(
 707               IDS_ERRORPAGES_SUGGESTION_RELOAD_REPOST_HEADER));
 708       suggest_reload_repost->SetString("body",
 709           l10n_util::GetStringUTF16(
 710               IDS_ERRORPAGES_SUGGESTION_RELOAD_REPOST_BODY));
 711       // Add at the front, so it appears before other suggestions, in the case
 712       // suggestions are being overridden by |params|.
 713       suggestions->Insert(0, suggest_reload_repost);
 714     }
 715   }
 716
 717   // If not using the default suggestions, nothing else to do.
 718   if (!use_default_suggestions)
 719     return;
 720
 721   base::CommandLine* command_line = base::CommandLine::ForCurrentProcess();
 722   const std::string& show_saved_copy_value =
 723       command_line->GetSwitchValueASCII(switches::kShowSavedCopy);
 724   bool show_saved_copy_primary = (show_saved_copy_value ==
 725       switches::kEnableShowSavedCopyPrimary);
 726   bool show_saved_copy_secondary = (show_saved_copy_value ==
 727       switches::kEnableShowSavedCopySecondary);
 728   bool show_saved_copy_visible =
 729       (stale_copy_in_cache && !is_post &&
 730       (show_saved_copy_primary || show_saved_copy_secondary));
 731
 732   if (show_saved_copy_visible) {
 733     base::DictionaryValue* show_saved_copy_button = new base::DictionaryValue;
 734     show_saved_copy_button->SetString(
 735         "msg", l10n_util::GetStringUTF16(
 736             IDS_ERRORPAGES_BUTTON_SHOW_SAVED_COPY));
 737     show_saved_copy_button->SetString(
 738         "title",
 739         l10n_util::GetStringUTF16(IDS_ERRORPAGES_BUTTON_SHOW_SAVED_COPY_HELP));
 740     if (show_saved_copy_primary)
 741       show_saved_copy_button->SetString("primary", "true");
 742     error_strings->Set("showSavedCopyButton", show_saved_copy_button);
 743   }
 744
 745 #if defined(OS_CHROMEOS)
 746   // ChromeOS has its own diagnostics extension, which doesn't rely on a
 747   // browser-initiated dialog.
 748   can_show_network_diagnostics_dialog = true;
 749 #endif
 750   if (can_show_network_diagnostics_dialog && failed_url.is_valid() &&
 751       failed_url.SchemeIsHTTPOrHTTPS()) {
 752     error_strings->SetString(
 753         "diagnose", l10n_util::GetStringUTF16(IDS_ERRORPAGES_BUTTON_DIAGNOSE));
 754   }
 755
 756   if (options.suggestions & SUGGEST_CHECK_CONNECTION) {
 757     base::DictionaryValue* suggest_check_connection = new base::DictionaryValue;
 758     suggest_check_connection->SetString("header",
 759         l10n_util::GetStringUTF16(
 760             IDS_ERRORPAGES_SUGGESTION_CHECK_CONNECTION_HEADER));
 761     suggest_check_connection->SetString("body",
 762         l10n_util::GetStringUTF16(
 763             IDS_ERRORPAGES_SUGGESTION_CHECK_CONNECTION_BODY));
 764     suggestions->Append(suggest_check_connection);
 765   }
 766
 767   if (options.suggestions & SUGGEST_DNS_CONFIG) {
 768     base::DictionaryValue* suggest_dns_config = new base::DictionaryValue;
 769     suggest_dns_config->SetString("header",
 770         l10n_util::GetStringUTF16(
 771             IDS_ERRORPAGES_SUGGESTION_DNS_CONFIG_HEADER));
 772     suggest_dns_config->SetString("body",
 773         l10n_util::GetStringUTF16(
 774             IDS_ERRORPAGES_SUGGESTION_DNS_CONFIG_BODY));
 775     suggestions->Append(suggest_dns_config);
 776
 777     base::DictionaryValue* suggest_network_prediction =
 778         GetStandardMenuItemsText();
 779     suggest_network_prediction->SetString("header",
 780         l10n_util::GetStringUTF16(
 781             IDS_ERRORPAGES_SUGGESTION_NETWORK_PREDICTION_HEADER));
 782     suggest_network_prediction->SetString("body",
 783         l10n_util::GetStringUTF16(
 784             IDS_ERRORPAGES_SUGGESTION_NETWORK_PREDICTION_BODY));
 785     suggest_network_prediction->SetString(
 786         "noNetworkPredictionTitle",
 787         l10n_util::GetStringUTF16(
 788             IDS_NETWORK_PREDICTION_ENABLED_DESCRIPTION));
 789     suggestions->Append(suggest_network_prediction);
 790   }
 791
 792   if (options.suggestions & SUGGEST_FIREWALL_CONFIG) {
 793     base::DictionaryValue* suggest_firewall_config = new base::DictionaryValue;
 794     suggest_firewall_config->SetString("header",
 795         l10n_util::GetStringUTF16(
 796             IDS_ERRORPAGES_SUGGESTION_FIREWALL_CONFIG_HEADER));
 797     suggest_firewall_config->SetString("body",
 798         l10n_util::GetStringUTF16(
 799             IDS_ERRORPAGES_SUGGESTION_FIREWALL_CONFIG_BODY));
 800     suggestions->Append(suggest_firewall_config);
 801   }
 802
 803   if (options.suggestions & SUGGEST_PROXY_CONFIG) {
 804     base::DictionaryValue* suggest_proxy_config = GetStandardMenuItemsText();
 805     suggest_proxy_config->SetString("header",
 806         l10n_util::GetStringUTF16(
 807             IDS_ERRORPAGES_SUGGESTION_PROXY_CONFIG_HEADER));
 808     suggest_proxy_config->SetString("body",
 809         l10n_util::GetStringFUTF16(IDS_ERRORPAGES_SUGGESTION_PROXY_CONFIG_BODY,
 810             l10n_util::GetStringUTF16(
 811                 IDS_ERRORPAGES_SUGGESTION_PROXY_DISABLE_PLATFORM)));
 812     suggest_proxy_config->SetString("proxyTitle",
 813         l10n_util::GetStringUTF16(IDS_OPTIONS_PROXIES_CONFIGURE_BUTTON));
 814
 815     suggestions->Append(suggest_proxy_config);
 816   }
 817
 818   if (options.suggestions & SUGGEST_DISABLE_EXTENSION) {
 819     base::DictionaryValue* suggest_disable_extension =
 820         new base::DictionaryValue;
 821     // There's only a header for this suggestion.
 822     suggest_disable_extension->SetString("header",
 823         l10n_util::GetStringUTF16(
 824             IDS_ERRORPAGES_SUGGESTION_DISABLE_EXTENSION_HEADER));
 825     suggestions->Append(suggest_disable_extension);
 826   }
 827
 828   if (options.suggestions & SUGGEST_VIEW_POLICIES) {
 829     base::DictionaryValue* suggest_view_policies = new base::DictionaryValue;
 830     suggest_view_policies->SetString(
 831         "header",
 832         l10n_util::GetStringUTF16(
 833             IDS_ERRORPAGES_SUGGESTION_VIEW_POLICIES_HEADER));
 834     suggest_view_policies->SetString(
 835         "body",
 836         l10n_util::GetStringUTF16(
 837             IDS_ERRORPAGES_SUGGESTION_VIEW_POLICIES_BODY));
 838     suggestions->Append(suggest_view_policies);
 839   }
 840
 841   if (options.suggestions & SUGGEST_CONTACT_ADMINISTRATOR) {
 842     base::DictionaryValue* suggest_contant_administrator =
 843         new base::DictionaryValue;
 844     suggest_contant_administrator->SetString(
 845         "body",
 846         l10n_util::GetStringUTF16(
 847             IDS_ERRORPAGES_SUGGESTION_CONTACT_ADMINISTRATOR_BODY));
 848     suggestions->Append(suggest_contant_administrator);
 849   }
 850
 851   if (options.suggestions & SUGGEST_LEARNMORE) {
 852     GURL learn_more_url;
 853     switch (options.error_code) {
 854       case net::ERR_TOO_MANY_REDIRECTS:
 855         learn_more_url = GURL(kRedirectLoopLearnMoreUrl);
 856         break;
 857       case net::ERR_SSL_WEAK_SERVER_EPHEMERAL_DH_KEY:
 858         learn_more_url = GURL(kWeakDHKeyLearnMoreUrl);
 859         break;
 860       default:
 861         break;
 862     }
 863
 864     if (learn_more_url.is_valid()) {
 865       // Add the language parameter to the URL.
 866       std::string query = learn_more_url.query() + "&hl=" + locale;
 867       GURL::Replacements repl;
 868       repl.SetQueryStr(query);
 869       learn_more_url = learn_more_url.ReplaceComponents(repl);
 870
 871       base::DictionaryValue* suggest_learn_more = new base::DictionaryValue;
 872       // There's only a body for this suggestion.
 873       suggest_learn_more->SetString("body",
 874           l10n_util::GetStringUTF16(IDS_ERRORPAGES_SUGGESTION_LEARNMORE_BODY));
 875       suggest_learn_more->SetString("learnMoreUrl", learn_more_url.spec());
 876       suggestions->Append(suggest_learn_more);
 877     }
 878   }
 879 }
 880
 881 base::string16 LocalizedError::GetErrorDetails(const blink::WebURLError& error,
 882                                                bool is_post) {
 883   const LocalizedErrorMap* error_map =
 884       LookupErrorMap(error.domain.utf8(), error.reason, is_post);
 885   if (error_map)
 886     return l10n_util::GetStringUTF16(error_map->details_resource_id);
 887   else
 888     return l10n_util::GetStringUTF16(IDS_ERRORPAGES_DETAILS_UNKNOWN);
 889 }
 890
 891 bool LocalizedError::HasStrings(const std::string& error_domain,
 892                                 int error_code) {
 893   // Whether or not the there are strings for an error does not depend on
 894   // whether or not the page was be generated by a POST, so just claim it was
 895   // not.
 896   return LookupErrorMap(error_domain, error_code, /*is_post=*/false) != NULL;
 897 }
 898
 899 void LocalizedError::EnableGoogleCachedCopyButtonExperiment(
 900     base::ListValue* suggestions,
 901     base::DictionaryValue* error_strings) {
 902   std::string field_trial_exp_type_ =
 903       base::FieldTrialList::FindFullName(kCachedCopyButtonFieldTrial);
 904
 905   // If the first suggestion is for a Google cache copy. Promote the
 906   // suggestion to a separate set of strings for displaying as a button.
 907   if (!suggestions->empty() && !field_trial_exp_type_.empty() &&
 908       field_trial_exp_type_ != kCachedCopyButtonExpTypeControl) {
 909     base::DictionaryValue* suggestion;
 910     suggestions->GetDictionary(0, &suggestion);
 911     int type = -1;
 912     suggestion->GetInteger("type", &type);
 913
 914     if (type == kGoogleCachedCopySuggestionType) {
 915       base::string16 cache_url;
 916       suggestion->GetString("urlCorrection", &cache_url);
 917       int cache_tracking_id = -1;
 918       suggestion->GetInteger("trackingId", &cache_tracking_id);
 919
 920       scoped_ptr<base::DictionaryValue> cache_button(new base::DictionaryValue);
 921
 922       // Google cache copy button label experiment.
 923       if (field_trial_exp_type_ == kCachedCopyButtonExpTypeCopy) {
 924         cache_button->SetString(
 925             "msg",
 926             l10n_util::GetStringUTF16(IDS_ERRORPAGES_BUTTON_SHOW_CACHED_COPY));
 927         cache_button->SetBoolean("defaultLabel", false);
 928       } else {
 929         // Default to "Show cached page" button label.
 930         cache_button->SetString(
 931             "msg",
 932             l10n_util::GetStringUTF16(IDS_ERRORPAGES_BUTTON_SHOW_CACHED_PAGE));
 933         cache_button->SetBoolean("defaultLabel", true);
 934       }
 935       cache_button->SetString("cacheUrl", cache_url);
 936       cache_button->SetInteger("trackingId", cache_tracking_id);
 937       error_strings->Set("cacheButton", cache_button.release());
 938
 939       // Remove the item from suggestions dictionary so that it does not get
 940       // displayed by the template in the details section.
 941       suggestions->Remove(0, nullptr);
 942     }
 943   }
 944 }