Allow MessageWindow callers to specify a minimum width.

remoting/webapp/base/js/message_window_helper.js

 // Copyright 2014 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.
 
 'use strict';
 
 /** @suppress {duplicate} */
 var remoting = remoting || {};
 
 /** @constructor */
@@ skipping 20 matching lines @@
   this.infobox = '';
 
   /** @type {?function():void} */
   this.onTimeout = function() {};
 
   /** @type {string} */
   this.htmlFile = '';
 
   /** @type {string} */
   this.frame = '';
+
+  /** @type {number} */
+  this.minimumWidth = 0;
 };
 
 /**
  * Create a new message window.
  *
  * @param {remoting.MessageWindowOptions} options Message window create options
  * @constructor
  */
 remoting.MessageWindow = function(options) {
   var title = options.title;
@@ skipping 38 matching lines @@
     title: title,
     message: message,
     infobox: infobox,
     buttonLabel: okButtonLabel,
     cancelButtonLabel: cancelButtonLabel,
     showSpinner: (duration != 0)
   };
 
   var windowAttributes = {
     bounds: {
-      width: 400,
+      width: options.minimumWidth || 400,
       height: 100
     },
     resizable: false,
     frame: options.frame || 'chrome'
   };
 
   /** @type {remoting.MessageWindow} */
   var that = this;
 
   /** @param {AppWindow} appWindow */
@@ skipping 157 matching lines @@
 
 /**
  * Cancel the current connection and close all app windows.
  *
  * @param {number} result The dialog result.
  */
 remoting.MessageWindow.quitApp = function(result) {
   remoting.MessageWindowManager.closeAllMessageWindows();
   window.close();
 };