search: Rename search_providers to open-search-providers

We will allow applications to hook into shell's search by registering
a service which implements a well-known DBus interface.
"search-providers" is a reasonable directory name for applications to
drop their registration files, but it conflicts with "search_providers"
used by open search providers - rename the latter to avoid confusion.

https://bugzilla.gnome.org/show_bug.cgi?id=663125

data/Makefile.am

@@ -12,10 +12,10 @@ desktop_DATA = gnome-shell.desktop gnome-shell-extension-prefs.desktop
 %.desktop:%.desktop.in
 	$(AM_V_GEN) sed s/^_// < $< > $@ || rm $@
 
-searchprovidersdir = $(pkgdatadir)/search_providers
+searchprovidersdir = $(pkgdatadir)/open-search-providers
 dist_searchproviders_DATA =				\
-	search_providers/google.xml				\
-	search_providers/wikipedia.xml
+	open-search-providers/google.xml		\
+	open-search-providers/wikipedia.xml
 
 themedir = $(pkgdatadir)/theme
 dist_theme_DATA =				\

js/ui/search.js

@@ -310,7 +310,7 @@ const OpenSearchSystem = new Lang.Class({
     },
 
     _addProvider: function(fileName) {
-        let path = global.datadir + '/search_providers/' + fileName;
+        let path = global.datadir + '/open-search-providers/' + fileName;
         let source = Shell.get_file_contents_utf8_sync(path);
         let [success, name, url, langs, icon_uri] = Shell.parse_search_provider(source);
         let provider ={ name: name,
@@ -327,7 +327,7 @@ const OpenSearchSystem = new Lang.Class({
     _refresh: function() {
         this._providers = [];
         let names = global.settings.get_strv(DISABLED_OPEN_SEARCH_PROVIDERS_KEY);
-        let file = Gio.file_new_for_path(global.datadir + '/search_providers');
+        let file = Gio.file_new_for_path(global.datadir + '/open-search-providers');
         FileUtils.listDirAsync(file, Lang.bind(this, function(files) {
             for (let i = 0; i < files.length; i++) {
                 let enabled = true;