Add button to add new FSP services to Files app.

ui/file_manager/file_manager/foreground/js/cws_container_client.js

 // Copyright 2013 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 /**
  * @param {WebView} webView Web View tag.
- * @param {?string} ext File extension.
- * @param {?string} mime File mime type.
- * @param {?string} searchQuery Search query.
  * @param {number} width Width of the CWS widget.
  * @param {number} height Height of the CWS widget.
  * @param {string} url Share Url for an entry.
  * @param {string} target Target (scheme + host + port) of the widget.
+ * @param {Object<string, *>} options Options to be sent to the dialog host.
  * @constructor
  * @extends {cr.EventTarget}
  */
-function CWSContainerClient(
-    webView, ext, mime, searchQuery, width, height, url, target) {
+function CWSContainerClient(webView, width, height, url, target, options) {
   this.webView_ = webView;
-  this.ext_ = (ext && ext[0] == '.') ? ext.substr(1) : ext;
-  this.mime_ = mime;
-  this.searchQuery_ = searchQuery;
   this.width_ = width;
   this.height_ = height;
   this.url_ = url;
   this.target_ = target;
+  this.options_ = options;
 
   this.loaded_ = false;
   this.loading_ = false;
 
   this.onMessageBound_ = this.onMessage_.bind(this);
   this.onLoadStopBound_ = this.onLoadStop_.bind(this);
   this.onLoadAbortBound_ = this.onLoadAbort_.bind(this);
 }
 
 CWSContainerClient.prototype = {
@@ skipping 146 matching lines @@
  */
 CWSContainerClient.prototype.postInitializeMessage_ = function() {
   var message = {
     message: 'initialize',
     hl: util.getCurrentLocaleOrDefault(),
     width: this.width_,
     height: this.height_,
     v: 1
   };
 
-  if (this.searchQuery_) {
-    message['search_query'] = this.searchQuery_;
-  } else {
-    message['file_extension'] = this.ext_;
-    message['mime_type'] = this.mime_;
+  if (this.options_) {
+    Object.keys(this.options_).forEach(function(key) {
+      message[key] = this.options_[key];
+    }.bind(this));
   }
 
   this.postMessage_(message);
 };
 
 /**
  * Send a message to the widget. This method shouldn't be called directly,
  * should from more specified posting function (eg. postXyzMessage_()).
  *
  * @param {Object} message Message object to be posted.
@@ skipping 31 matching lines @@
       'loadabort', this.onLoadAbortBound_);
   this.webView_.stop();
 };
 
 /**
  * Cleans the dialog by removing all handlers.
  */
 CWSContainerClient.prototype.dispose = function() {
   this.abort();
 };