[HBD] Update MD SiteSettingsHandler to support 3 modes.

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 <memory>
 #include <string>
 #include <utility>
 
@@ skipping 314 matching lines @@
   const base::Value* callback_id;
   CHECK(args->Get(0, &callback_id));
   std::string type;
   CHECK(args->GetString(1, &type));
 
   ContentSettingsType content_type =
       static_cast<ContentSettingsType>(static_cast<int>(
           site_settings::ContentSettingsTypeFromGroupName(type)));
   HostContentSettingsMap* map =
       HostContentSettingsMapFactory::GetForProfile(profile_);
-  ContentSetting setting = map->GetDefaultContentSetting(content_type, nullptr);
 
-  // FullScreen is Allow vs. Ask.
-  bool enabled;
-  if (content_type == CONTENT_SETTINGS_TYPE_FULLSCREEN)
-      enabled = setting != CONTENT_SETTING_ASK;
-  else
-      enabled = setting != CONTENT_SETTING_BLOCK;
-
-  ResolveJavascriptCallback(*callback_id, base::FundamentalValue(enabled));
+  std::string setting = content_settings::ContentSettingToString(
+      map->GetDefaultContentSetting(content_type, nullptr));
+  ResolveJavascriptCallback(*callback_id, base::StringValue(setting));
 }
 
 void SiteSettingsHandler::HandleGetExceptionList(const base::ListValue* args) {
   AllowJavascript();
 
   CHECK_EQ(2U, args->GetSize());
   const base::Value* callback_id;
   CHECK(args->Get(0, &callback_id));
   std::string type;
   CHECK(args->GetString(1, &type));
@@ skipping 73 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