Use SkinMustache value for user messages

This is now provided in the core SkinMustache interface and
is not needed here.

Change-Id: Iaee8fad2b1fd5e72beee544b0c2e8f62ff371073

includes/SkinVector.php

@@ -116,8 +116,6 @@ class SkinVector extends SkinMustache {
 		//
 		// Conditionally used values must use null to indicate absence (not false or '').
 		$mainPageHref = Skin::makeMainPageUrl();
-		// From Skin::getNewtalks(). Always returns string, cast to null if empty.
-		$newTalksHtml = $skin->getNewtalks() ?: null;
 
 		$isSearchInHeader = $featureManager->isFeatureEnabled( Constants::FEATURE_SEARCH_IN_HEADER );
 
@@ -130,7 +128,6 @@ class SkinVector extends SkinMustache {
 			// Remember that the string '0' is a valid title.
 			// From OutputPage::getPageTitle, via ::setPageTitle().
 			'html-title' => $out->getPageTitle(),
-			'html-newtalk' => $newTalksHtml ? '<div class="usermessage">' . $newTalksHtml . '</div>' : '',
 
 			'html-categories' => $skin->getCategories(),
 

includes/templates/skin-legacy.mustache

@@ -37,7 +37,7 @@
 		{{#page-isarticle}}<div id="siteSub" class="noprint">{{msg-tagline}}</div>{{/page-isarticle}}
 		<div id="contentSub"{{{html-user-language-attributes}}}>{{{html-subtitle}}}</div>
 		<div id="contentSub2">{{{html-undelete-link}}}</div>
-		{{{html-newtalk}}}
+		{{{html-user-message}}}
 		{{!
 			Keep this empty `div` for compatibility with gadgets and user scripts
 			using this place to insert extra elements before.

includes/templates/skin.mustache

@@ -67,7 +67,7 @@
 		{{#page-isarticle}}<div id="siteSub" class="noprint">{{msg-tagline}}</div>{{/page-isarticle}}
 		<div id="contentSub"{{{html-user-language-attributes}}}>{{{html-subtitle}}}</div>
 		<div id="contentSub2">{{{html-undelete-link}}}</div>
-		{{{html-newtalk}}}
+		{{{html-user-message}}}
 		{{^is-search-in-header}}
 		<a class="mw-jump-link" href="#mw-sidebar-button">{{msg-vector-jumptonavigation}}</a>
 		<a class="mw-jump-link" href="#searchInput">{{msg-vector-jumptosearch}}</a>