Move the protocol handler into a proper helper module

Previous file history in 80dfdcd6, couldn't keep it.

app/assets/javascripts/helpers/protocol_handler.js

+// @license magnet:?xt=urn:btih:0b31508aeb0634b347b8270c7bee4d411b5d4109&dn=agpl-3.0.txt AGPL-v3-or-Later
+
+Diaspora.ProtocolHandler = {
+  register: function() {
+    if (typeof (window.navigator.registerProtocolHandler) !== "function") {
+      return false;
+    }
+
+    var protocol = location.protocol;
+    var slashes = protocol.concat("//");
+    var host = slashes.concat(window.location.hostname);
+
+    if (location.port) {
+      host = host.concat(":" + location.port);
+    }
+
+    window.navigator.registerProtocolHandler("web+diaspora", host.concat("/link?q=%s"), document.title);
+    return true;
+  }
+};
+
+Diaspora.ProtocolHandler.register();

app/assets/javascripts/main.js

@@ -45,5 +45,5 @@
 //= require api/authorization_page
 //= require bootstrap-markdown/bootstrap-markdown
 //= require helpers/markdown_editor
+//= require helpers/protocol_handler
 //= require jquery.are-you-sure
-//= require protocol-handler

app/assets/javascripts/protocol-handler.js

-// @license magnet:?xt=urn:btih:0b31508aeb0634b347b8270c7bee4d411b5d4109&dn=agpl-3.0.txt AGPL-v3-or-Later
-
-function registerDiasporaLinksProtocol() {
-  var protocol = location.protocol;
-  var slashes = protocol.concat("//");
-  var host = slashes.concat(window.location.hostname);
-
-  if (location.port) {
-    host = host.concat(":" + location.port);
-  }
-
-  window.navigator.registerProtocolHandler("web+diaspora", host.concat("/link?q=%s"), document.title);
-}
-
-if (typeof (window.navigator.registerProtocolHandler) === "function") {
-  registerDiasporaLinksProtocol();
-}