[Extensions] Make chrome://extensions use developerPrivate for error calls

chrome/browser/resources/extensions/extensions.js

Index: chrome/browser/resources/extensions/extensions.js
diff --git a/chrome/browser/resources/extensions/extensions.js b/chrome/browser/resources/extensions/extensions.js
index 6500f07cbf32e1035b53ec1bb74840eeeb161c3a..d092dfdb822a5a00d16223a41a3f96baf8941231 100644
--- a/chrome/browser/resources/extensions/extensions.js
+++ b/chrome/browser/resources/extensions/extensions.js
@@ -364,6 +364,8 @@ cr.define('extensions', function() {
 
     var currentlyShowingOverlay = ExtensionSettings.getCurrentOverlay();
     if (currentlyShowingOverlay) {
+      if (currentlyShowingOverlay == node)
+        return;
       currentlyShowingOverlay.classList.remove('showing');
       cr.dispatchSimpleEvent($('overlay'), 'cancelOverlay');
     }