Settings: Cookies: Avoid duplicate 'incognito' exceptions in CrOS Guest mode

chrome/browser/ui/webui/settings/site_settings_handler.cc

 // Copyright 2016 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "chrome/browser/ui/webui/settings/site_settings_handler.h"
 
 #include <algorithm>
 #include <memory>
 #include <string>
 #include <utility>
@@ skipping 422 matching lines @@
 
   HostContentSettingsMap* map =
       HostContentSettingsMapFactory::GetForProfile(profile_);
   const auto* extension_registry = extensions::ExtensionRegistry::Get(profile_);
   AddExceptionsGrantedByHostedApps(profile_, APIPermissionFromGroupName(type),
       exceptions.get());
   site_settings::GetExceptionsFromHostContentSettingsMap(
       map, content_type, extension_registry, web_ui(), /*incognito=*/false,
       /*filter=*/nullptr, exceptions.get());
 
-  if (profile_->HasOffTheRecordProfile()) {
-    Profile* incognito = profile_->GetOffTheRecordProfile();
+  Profile* incognito = profile_->HasOffTheRecordProfile()
+                           ? profile_->GetOffTheRecordProfile()
+                           : nullptr;
+  // On Chrome OS in Guest mode the incognito profile is the primary profile,
+  // so do not fetch an extra copy of the same exceptions.
+  if (incognito && incognito != profile_) {
     map = HostContentSettingsMapFactory::GetForProfile(incognito);
     extension_registry = extensions::ExtensionRegistry::Get(incognito);
     site_settings::GetExceptionsFromHostContentSettingsMap(
         map, content_type, extension_registry, web_ui(), /*incognito=*/true,
         /*filter=*/nullptr, exceptions.get());
   }
 
   ResolveJavascriptCallback(*callback_id, *exceptions.get());
 }
 
@@ skipping 290 matching lines @@
     origin = content::kUnreachableWebDataURL;
   }
 
   content::HostZoomMap* host_zoom_map;
   host_zoom_map = content::HostZoomMap::GetDefaultForBrowserContext(profile_);
   double default_level = host_zoom_map->GetDefaultZoomLevel();
   host_zoom_map->SetZoomLevelForHost(origin, default_level);
 }
 
 }  // namespace settings