Site Settings Desktop: Fix NOTREACHED when group name is unregistered.

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 "base/bind.h"
 #include "chrome/browser/browsing_data/browsing_data_local_storage_helper.h"
 #include "chrome/browser/content_settings/host_content_settings_map_factory.h"
 #include "chrome/browser/profiles/profile.h"
@@ skipping 85 matching lines @@
     CallJavascriptFunction("settings.WebsiteUsagePrivateApi.onUsageCleared",
                            base::StringValue(clearing_origin_));
   }
 }
 
 void SiteSettingsHandler::OnContentSettingChanged(
     const ContentSettingsPattern& primary_pattern,
     const ContentSettingsPattern& secondary_pattern,
     ContentSettingsType content_type,
     std::string resource_identifier) {
+  if (!site_settings::HasRegisteredGroupName(content_type))
+    return;
+
   if (primary_pattern.ToString().empty()) {
     CallJavascriptFunction(
         "cr.webUIListenerCallback",
         base::StringValue("contentSettingCategoryChanged"),
         base::StringValue(site_settings::ContentSettingsTypeToGroupName(
             content_type)));
   } else {
     CallJavascriptFunction(
         "cr.webUIListenerCallback",
         base::StringValue("contentSettingSitePermissionChanged"),
@@ skipping 172 matching lines @@
   std::string pattern_string;
   CHECK(args->GetString(1, &pattern_string));
 
   ContentSettingsPattern pattern =
       ContentSettingsPattern::FromString(pattern_string);
   ResolveJavascriptCallback(
       *callback_id, base::FundamentalValue(pattern.IsValid()));
 }
 
 }  // namespace settings