SplitSettings: Use Languages (plural) as section header in OS settings

UX wants to use the plural. This better matches the section header.

http://screen/BxGwHyw9fdr

Bug: 982299
Change-Id: I9818562067614b4a4afe760babd276bb90e79a70
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1750150
Commit-Queue: James Cook <jamescook@chromium.org>
Commit-Queue: Xiyuan Xia <xiyuan@chromium.org>
Auto-Submit: James Cook <jamescook@chromium.org>
Reviewed-by: Xiyuan Xia <xiyuan@chromium.org>
Cr-Commit-Position: refs/heads/master@{#686258}

chrome/app/os_settings_strings.grdp

@@ -14,6 +14,9 @@
   <message name="IDS_OS_SETTINGS_LANGUAGES_AND_INPUT_PAGE_TITLE" desc="Name of the OS settings page which displays language method preferences.">
     Languages and input
   </message>
+  <message name="IDS_OS_SETTINGS_LANGUAGES_LIST_TITLE" desc="Title for the list of the user's preferred written languages.">
+    Languages
+  </message>
 
   <!-- Personalization Page (OS settings) -->
   <message name="IDS_OS_SETTINGS_PERSONALIZATION" desc="Name of the OS settings page which displays personalization preferences.">

chrome/browser/resources/settings/chromeos/os_languages_page/os_languages_page.html

@@ -144,7 +144,7 @@
 
     <div route-path="default">
 
-      <h2>$i18n{languagesListTitle}</h2>
+      <h2>$i18n{osLanguagesListTitle}</h2>
 
       <span class="settings-box first"
           hidden="[[isHelpTextHidden_(languages.enabled.*)]]">

chrome/browser/ui/webui/settings/settings_localized_strings_provider.cc

@@ -689,7 +689,6 @@ void AddAppearanceStrings(content::WebUIDataSource* html_source,
     {"personalizationPageTitle", IDS_OS_SETTINGS_PERSONALIZATION},
     {"openWallpaperApp", IDS_OS_SETTINGS_OPEN_WALLPAPER_APP},
     {"setWallpaper", IDS_OS_SETTINGS_SET_WALLPAPER},
-    {"osLanguagesPageTitle", IDS_OS_SETTINGS_LANGUAGES_AND_INPUT_PAGE_TITLE},
 #endif
 #if defined(OS_LINUX) && !defined(OS_CHROMEOS)
     {"showWindowDecorations", IDS_SHOW_WINDOW_DECORATIONS},
@@ -1530,6 +1529,8 @@ void AddLanguagesStrings(content::WebUIDataSource* html_source) {
     {"removeLanguage", IDS_SETTINGS_LANGUAGES_LANGUAGES_LIST_REMOVE},
     {"addLanguages", IDS_SETTINGS_LANGUAGES_LANGUAGES_ADD},
 #if defined(OS_CHROMEOS)
+    {"osLanguagesPageTitle", IDS_OS_SETTINGS_LANGUAGES_AND_INPUT_PAGE_TITLE},
+    {"osLanguagesListTitle", IDS_OS_SETTINGS_LANGUAGES_LIST_TITLE},
     {"inputMethodsListTitle", IDS_SETTINGS_LANGUAGES_INPUT_METHODS_LIST_TITLE},
     {"inputMethodEnabled", IDS_SETTINGS_LANGUAGES_INPUT_METHOD_ENABLED},
     {"inputMethodsExpandA11yLabel",