Bug 626358: No loading indicator anymore on Get Addons pane. r=dtownsend, a=blocks-final

toolkit/mozapps/extensions/content/extensions.xul

@@ -253,10 +253,10 @@
     <box id="view-port-container" flex="1">
 
       <!-- view port -->
-      <deck id="view-port" flex="1">
+      <deck id="view-port" flex="1" selectedIndex="0">
 
         <!-- discover view -->
-        <deck id="discover-view" flex="1" class="view-pane">
+        <deck id="discover-view" flex="1" class="view-pane" selectedIndex="0">
           <vbox id="discover-loading" align="center" pack="stretch" flex="1" class="alert-container">
             <spacer class="alert-spacer-before"/>
             <hbox class="alert loading" align="center">

toolkit/mozapps/extensions/test/browser/browser_discovery.js

@@ -141,8 +141,13 @@ function testHash(aBrowser, aCallback) {
 }
 
 function isLoading() {
-  return gManagerWindow.document.getElementById("discover-view").selectedPanel ==
-         gManagerWindow.document.getElementById("discover-loading");
+  var loading = gManagerWindow.document.getElementById("discover-view").selectedPanel ==
+                gManagerWindow.document.getElementById("discover-loading");
+  if (loading) {
+    is_element_visible(gManagerWindow.document.querySelector("#discover-loading .loading"),
+                       "Loading message should be visible when its panel is the selected panel");
+  }
+  return loading;
 }
 
 function isError() {