Make the navigation tree footer hidden

First step in removal of the deprecated progress center.

Bug: 1027012
Change-Id: I34ea74d0f56b8a6327dbdf2f6b37c6d5786ac084
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1952060
Commit-Queue: Alex Danilo <adanilo@chromium.org>
Reviewed-by: Noel Gordon <noel@chromium.org>
Cr-Commit-Position: refs/heads/master@{#721909}

chrome/browser/chromeos/file_manager/file_manager_uitest.cc

@@ -93,8 +93,4 @@ IN_PROC_BROWSER_TEST_F(FileManagerUITest, PluginVmShare) {
   RunTest("pluginVmShare");
 }
 
-IN_PROC_BROWSER_TEST_F(FileManagerUITest, ProgressCenter) {
-  RunTest("progressCenter");
-}
-
 }  // namespace file_manager

ui/file_manager/file_manager/main.html

@@ -489,7 +489,7 @@
         <div class="dialog-navigation-list-contents" role="navigation">
           <tree id="directory-tree" role="tree" tabindex="21"></tree>
         </div>
-        <div class="dialog-navigation-list-footer">
+        <div class="dialog-navigation-list-footer" hidden>
           <div id="progress-center" hidden>
             <li id="progress-center-close-view">
               <div class="progress-frame">