Revert of [Chromoting] Show any startup errors in the LoadingWindow.

remoting/webapp/base/js/message_window_helper.js

Index: remoting/webapp/base/js/message_window_helper.js
diff --git a/remoting/webapp/base/js/message_window_helper.js b/remoting/webapp/base/js/message_window_helper.js
index ffcdc23a16ef9989e8e597cc46537bac32f53946..f6657577c4982894d44f22afa5bd43c2f5e1ea22 100644
--- a/remoting/webapp/base/js/message_window_helper.js
+++ b/remoting/webapp/base/js/message_window_helper.js
@@ -41,9 +41,6 @@
 
   /** @type {number} */
   this.minimumWidth = 0;
-
-  /** @type {boolean} */
-  this.showSpinner = false;
 };
 
 /**
@@ -154,32 +151,8 @@
   }
 
   var message_struct = {
-    command: 'update',
+    command: 'update_message',
     message: message
-  };
-  this.window_.postMessage(message_struct, '*');
-};
-
-/**
- * Update the message being shown in the window to the given error message.
- * In addition to updating the message, any spinner is disabled and the
- * button text is changed to 'OK'.
- * This should only be called after the window has been shown.
- *
- * @param {string} message The message.
- */
-remoting.MessageWindow.prototype.updateErrorMessage = function(message) {
-  if (!this.window_) {
-    this.pendingWindowOperations_.push(this.updateMessage.bind(this, message));
-    return;
-  }
-
-  var message_struct = {
-    command: 'update',
-    message: message,
-    buttonLabel: chrome.i18n.getMessage(/*i18n-content*/'OK'),
-    cancelButtonLabel: '',
-    showSpinner: false
   };
   this.window_.postMessage(message_struct, '*');
 };