Hotword Audio Verification App: Fix window handling.

chrome/browser/resources/hotword_audio_verification/flow.js

Index: chrome/browser/resources/hotword_audio_verification/flow.js
diff --git a/chrome/browser/resources/hotword_audio_verification/flow.js b/chrome/browser/resources/hotword_audio_verification/flow.js
index 635456a06650e4a47640fa85cbcd4ad929572492..55cdfc6e8ccbcb8a3cf46066cb43260e3d915fb6 100644
--- a/chrome/browser/resources/hotword_audio_verification/flow.js
+++ b/chrome/browser/resources/hotword_audio_verification/flow.js
@@ -73,6 +73,8 @@
    */
   Flow.prototype.showStep_ = function() {
     var currentStep = this.currentFlow_[this.currentStepIndex_];
+    document.getElementById(currentStep).hidden = false;
+
     var previousStep = null;
     if (this.currentStepIndex_ > 0)
       previousStep = this.currentFlow_[this.currentStepIndex_ - 1];
@@ -80,7 +82,9 @@
     if (previousStep)
       document.getElementById(previousStep).hidden = true;
 
-    document.getElementById(currentStep).hidden = false;
+    var appWindow = chrome.app.window.current();
+    if (appWindow)

[Dan Beam, 2014/10/27 23:13:20]

this doesn't answer my question as I don't know whether it's OK to drop this if
there's no window.

[kcarattini, 2014/10/27 23:24:12]

There should always be an app window in this context.

[Dan Beam, 2014/10/27 23:29:20]

then please leave the code as it was so we can catch unexpected situations

[kcarattini, 2014/10/27 23:57:20]

Done. Sorry, I misunderstood your earlier question.

+      appWindow.show();
   };
 
   window.Flow = Flow;