Fix Starting the feedback app.

chrome/browser/resources/feedback/js/event_handler.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.
 
 /**
  * @type {number}
  * @const
  */
 var FEEDBACK_WIDTH = 500;
 /**
@@ skipping 182 matching lines @@
   }
 
   chrome.feedbackPrivate.sendFeedback(finalFeedbackInfo, function(result) {});
 }
 
 /**
  * Callback which starts up the feedback UI.
  * @param {Object} feedbackInfo Object containing any initial feedback info.
  */
 function startFeedbackUI(feedbackInfo) {
-  initialFeedbackInfo = feedbackInfo;
-  finalFeedbackInfo = null;
-  systemInfo = null;
-  isSystemInfoReady = false;
-  onSystemInfoReadyCallback = null;
-
-  chrome.feedbackPrivate.getSystemInformation(getSystemInformationCallback);
-
   var win = chrome.app.window.get(FEEDBACK_DEFAULT_WINDOW_ID);
   if (win) {
     win.show();
     return;
   }
   chrome.app.window.create('html/default.html', {
       frame: 'none',
       id: FEEDBACK_DEFAULT_WINDOW_ID,
       width: FEEDBACK_WIDTH,
       height: FEEDBACK_HEIGHT,
       hidden: true,
       resizable: false },
       function(appWindow) {
+        // Initialize the state of the app only once upon the creation of the
+        // feedback UI window.
+        initialFeedbackInfo = feedbackInfo;
+        finalFeedbackInfo = null;
+        systemInfo = null;
+        isSystemInfoReady = false;
+        onSystemInfoReadyCallback = null;
+
         // Define some functions for the new window so that it can call back
         // into here.
 
         // Define a function for the new window to get the system information.
-        // Returns null if the system information is not ready yet.
-        appWindow.contentWindow.getSystemInformation = function() {
-          return systemInfo;
+        appWindow.contentWindow.getSystemInformation = function(callback) {
+          if (!isSystemInfoReady) {
+            onSystemInfoReadyCallback = callback;
+            chrome.feedbackPrivate.getSystemInformation(
+                getSystemInformationCallback);
+            return;
+          }
+
+          callback(systemInfo);
         };
 
         // Define a function to be called by the new window when the report is
         // not ready yet, and has to be sent later when the system information
         // is received.
         appWindow.contentWindow.sendReportLater = function(feedbackInfo) {
           finalFeedbackInfo = feedbackInfo;
           if (!isSystemInfoReady) {
             onSystemInfoReadyCallback = onSysInfoReadyForSend;
             return;
           }
 
           onSysInfoReadyForSend(systemInfo);
         };
 
         // Returns whether the system information has been received or not.
         appWindow.contentWindow.isSystemInfoReady = function() {
           return isSystemInfoReady;
         };
-
-        // Registers a callback that will be invoked when the system information
-        // is received.
-        appWindow.contentWindow.setOnSystemInfoReadyCallback =
-            function(callback) {
-              onSystemInfoReadyCallback = callback;
-            };
       });
 }
 
 chrome.runtime.onMessage.addListener(feedbackReadyHandler);
 chrome.runtime.onMessageExternal.addListener(requestFeedbackHandler);
 chrome.feedbackPrivate.onFeedbackRequested.addListener(startFeedbackUI);