LanguageNameIndexer: Generate PHP file instead of serialized file.

Serialized format is no longer in style for data. PHP files can
take advantage of AutoLoader and caching so they can even be faster
than serialized files. As side bonus we can have readable diffs
for updates.

Only downside is that the file generation takes about ten lines of
ugly string manipulation.

Change-Id: If09704d1172daa13c72a308814534cac1fe9899f

data/LanguageNameSearch.php

@@ -18,17 +18,7 @@
  * @licence MIT License
  */
 class LanguageNameSearch {
-	protected static $languagenames;
-
-	public static function init() {
-		self::$languagenames = unserialize( file_get_contents( __DIR__ . '/langnames.ser' ) );
-	}
-
 	public static function search( $searchKey, $typos = 0 ) {
-		if ( self::$languagenames === null ) {
-			self::init();
-		}
-
 		// Use code's mb_strtolower compatibily code for MW < 1.27
 		$language = Language::factory( 'en' );
 
@@ -36,11 +26,11 @@ class LanguageNameSearch {
 		$searchKey = $language->lc( $searchKey );
 		$index = self::getIndex( $searchKey );
 
-		if ( !isset( self::$languagenames[$index] ) ) {
+		if ( !isset( LanguageNameSearchData::$buckets[$index] ) ) {
 			return [];
 		}
 
-		$bucket = self::$languagenames[$index];
+		$bucket = LanguageNameSearchData::$buckets[$index];
 
 		$results = [];
 		foreach ( $bucket as $name => $code ) {