Display a banner above each panel that contains managed options....

chrome/browser/dom_ui/options_managed_banner_handler.cc

+// Copyright (c) 2010 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/dom_ui/options_managed_banner_handler.h"
+
+#include "base/utf_string_conversions.h"
+#include "base/values.h"
+#include "chrome/browser/dom_ui/dom_ui.h"
+#include "chrome/browser/profile.h"
+
+OptionsManagedBannerHandler::OptionsManagedBannerHandler(
+    DOMUI* dom_ui, const string16& page_name, OptionsPage page)
+    : ManagedPrefsBannerBase(dom_ui->GetProfile()->GetPrefs(), page),
+      dom_ui_(dom_ui), page_name_(page_name), page_(page) {
+  // Initialize the visibility state of the banner.
+  SetupBannerVisibilty();
+}
+
+void OptionsManagedBannerHandler::OnUpdateVisibility() {
+  // A preference that may be managed has changed.  Update our visibility
+  // state.
+  SetupBannerVisibilty();
+}
+
+void OptionsManagedBannerHandler::SetupBannerVisibilty() {
+  // Construct the banner visibility script name.
+  string16 script = ASCIIToUTF16("options.") + page_name_ +
+      ASCIIToUTF16(".getInstance().setManagedBannerVisibility");
+
+  // Get the visiblity value from the base class.
+  FundamentalValue visibility(DetermineVisibility());
+
+  // Set the managed state in the javascript handler.
+  dom_ui_->CallJavascriptFunction(UTF16ToWideHack(script), visibility);
+}
+