Change document.title used for keyboard overlay

The window title should be "Settings - Keyboard settings", but that
prefix is missing.

This doesn't change the title display within the overlay itself
("Keyboard settings").

R=stevenjb@chromium.org

Review URL: https://codereview.chromium.org/442583002

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@287702 0039d316-1c4b-4281-b951-d872f2087c98

chrome/browser/resources/options/chromeos/keyboard_overlay.html

 <div id="keyboard-overlay" class="page" hidden>
   <div class="close-button"></div>
-  <h1 i18n-content="keyboardOverlayTitle"></h1>
+  <h1 i18n-content="keyboardOverlay"></h1>
   <div class="content-area">
     <table class="option-control-table">
        <tr>

chrome/browser/resources/options/chromeos/keyboard_overlay.js

@@ -30,7 +30,7 @@ cr.define('options', function() {
    */
   function KeyboardOverlay() {
     options.SettingsDialog.call(this, 'keyboard-overlay',
-        loadTimeData.getString('keyboardOverlayTitle'),
+        loadTimeData.getString('keyboardOverlayTabTitle'),
         'keyboard-overlay',
         $('keyboard-confirm'), $('keyboard-cancel'));
   }

chrome/browser/ui/webui/options/chromeos/keyboard_handler.cc

@@ -56,9 +56,9 @@ KeyboardHandler::~KeyboardHandler() {
 void KeyboardHandler::GetLocalizedValues(
     base::DictionaryValue* localized_strings) {
   DCHECK(localized_strings);
+  RegisterTitle(localized_strings, "keyboardOverlay",
+                IDS_OPTIONS_KEYBOARD_OVERLAY_TITLE);
 
-  localized_strings->SetString("keyboardOverlayTitle",
-      l10n_util::GetStringUTF16(IDS_OPTIONS_KEYBOARD_OVERLAY_TITLE));
   localized_strings->SetString("remapSearchKeyToContent",
       l10n_util::GetStringUTF16(
           IDS_OPTIONS_SETTINGS_LANGUAGES_KEY_SEARCH_LABEL));