Add an error page for resources blocked via XSS Auditor.

components/error_page/common/localized_error.cc

Index: components/error_page/common/localized_error.cc
diff --git a/components/error_page/common/localized_error.cc b/components/error_page/common/localized_error.cc
index 1d05b90b92b2869b9fc765af7d9d7027bcf82b45..ef5bf3c5b006634d5e0cf099ad5bda4a05ba25ec 100644
--- a/components/error_page/common/localized_error.cc
+++ b/components/error_page/common/localized_error.cc
@@ -30,6 +30,7 @@
 #include "net/base/net_errors.h"
 #include "ui/base/l10n/l10n_util.h"
 #include "ui/base/webui/web_ui_util.h"
+#include "url/origin.h"
 
 #if defined(OS_WIN)
 #include "base/win/windows_version.h"
@@ -65,6 +66,7 @@ enum NAV_SUGGESTIONS {
   SUGGEST_COMPLETE_SETUP                    = 1 << 11,
   // Reload page suggestion for pages created by a post.
   SUGGEST_REPOST_RELOAD                     = 1 << 12,
+  SUGGEST_NAVIGATE_TO_ORIGIN                = 1 << 13,
 };
 
 enum SHOW_BUTTONS {
@@ -269,6 +271,12 @@ const LocalizedErrorMap net_error_options[] = {
    SUGGEST_DISABLE_EXTENSION,
    SHOW_BUTTON_RELOAD,
   },
+  {net::ERR_BLOCKED_BY_XSS_AUDITOR,
+   IDS_ERRORPAGES_HEADING_PAGE_NOT_WORKING,
+   IDS_ERRORPAGES_SUMMARY_BLOCKED_BY_XSS_AUDITOR,
+   SUGGEST_NAVIGATE_TO_ORIGIN,
+   SHOW_NO_BUTTONS,
+  },
   {net::ERR_NETWORK_CHANGED,
    IDS_ERRORPAGES_HEADING_CONNECTION_INTERRUPTED,
    IDS_ERRORPAGES_SUMMARY_NETWORK_CHANGED,
@@ -614,6 +622,23 @@ void GetSuggestionsSummaryList(int error_code,
   }
   DCHECK(!IsSuggested(suggestions, SUGGEST_REPOST_RELOAD));
 
+  if (IsOnlySuggestion(suggestions, SUGGEST_NAVIGATE_TO_ORIGIN)) {
+    DCHECK(suggestions_summary_list->empty());
+    DCHECK(!(suggestions & ~SUGGEST_NAVIGATE_TO_ORIGIN));
+    url::Origin failed_origin(failed_url);
+    if (failed_origin.unique())
+      return;
+
+    auto suggestion = base::MakeUnique<base::DictionaryValue>();
+    suggestion->SetString("summary",
+                          l10n_util::GetStringUTF16(
+                              IDS_ERRORPAGES_SUGGESTION_NAVIGATE_TO_ORIGIN));
+    suggestion->SetString("originURL", failed_origin.Serialize());
+    suggestions_summary_list->Append(std::move(suggestion));
+    return;
+  }
+  DCHECK(!IsSuggested(suggestions, SUGGEST_NAVIGATE_TO_ORIGIN));
+
   if (IsOnlySuggestion(suggestions, SUGGEST_LEARNMORE)) {
     DCHECK(suggestions_summary_list->empty());
     AddLinkedSuggestionToList(error_code, locale, suggestions_summary_list,