Show a different banner in chrome://settings for extension-controlled settings.

chrome/browser/ui/webui/options/options_managed_banner_handler.cc

-// Copyright (c) 2011 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/options/options_managed_banner_handler.h"
-
-#include "base/string_util.h"
-#include "base/values.h"
-#include "chrome/browser/profiles/profile.h"
-#include "content/browser/webui/web_ui.h"
-
-// static
-OptionsManagedBannerHandler* OptionsManagedBannerHandler::Create(
-    WebUI* web_ui, const string16& page_name, OptionsPage page) {
-  return new OptionsManagedBannerHandler(web_ui, page_name, page);
-}
-
-OptionsManagedBannerHandler::OptionsManagedBannerHandler(
-    WebUI* web_ui, const string16& page_name, OptionsPage page)
-    : policy::ManagedPrefsBannerBase(web_ui->GetProfile()->GetPrefs(), page),
-      web_ui_(web_ui), page_name_(page_name), page_(page) {
-  // Initialize the visibility state of the banner.
-  SetupBannerVisibility();
-}
-
-OptionsManagedBannerHandler::~OptionsManagedBannerHandler() {}
-
-void OptionsManagedBannerHandler::OnUpdateVisibility() {
-  // A preference that may be managed has changed.  Update our visibility
-  // state.
-  SetupBannerVisibility();
-}
-
-void OptionsManagedBannerHandler::SetupBannerVisibility() {
-  // Construct the banner visibility script name.
-  std::string script = "options." + UTF16ToASCII(page_name_) +
-      ".getInstance().setManagedBannerVisibility";
-
-  // Get the visiblity value from the base class.
-  FundamentalValue visibility(DetermineVisibility());
-
-  // Set the managed state in the javascript handler.
-  web_ui_->CallJavascriptFunction(script, visibility);
-}