Reland "Files app: Change opening a folder navigates to the folder"

This is a reland of fc33ef5c

Change getBreadcrumbPath() to check if '#location-breadcrumbs' wasn't
found to fix the issue when running on linux-chromeos-dbg.

Original change's description:
> Files app: Change opening a folder navigates to the folder
>
> Change Files app to navigate to the directory when a "selectionURL"
> provided in the launch params. Before this CL Files app would only show
> the directory selected.
>
> This change is to support the workflow from Issue:1090211. From ARC++
> the intent to "ACTION_VIEW_DOWNLOADS" will open the Files app in the
> Downloads folder.
>
> Bug: 1090211
> Change-Id: Ic6b9d290936f4a25576f3bfd5a799c37f6fa2195
> Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2379345
> Reviewed-by: Alex Danilo <adanilo@chromium.org>
> Commit-Queue: Luciano Pacheco <lucmult@chromium.org>
> Cr-Commit-Position: refs/heads/master@{#804071}

Bug: 1090211, 1125408
Change-Id: Ib1efce5415589842f671420e5adfb1bfd3ea5d9a
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2393412
Auto-Submit: Luciano Pacheco <lucmult@chromium.org>
Commit-Queue: Luciano Pacheco <lucmult@chromium.org>
Reviewed-by: Alex Danilo <adanilo@chromium.org>
Cr-Commit-Position: refs/heads/master@{#804657}

ui/file_manager/file_manager/background/js/test_util.js

@@ -485,6 +485,10 @@ test.util.sync.unload = contentWindow => {
 test.util.sync.getBreadcrumbPath = contentWindow => {
   const breadcrumb =
       contentWindow.document.querySelector('#location-breadcrumbs');
+  if (!breadcrumb) {
+    return '';
+  }
+
   let path = '';
 
   if (util.isFilesNg()) {

ui/file_manager/file_manager/foreground/js/file_manager.js

@@ -1252,10 +1252,8 @@ class FileManager extends cr.EventTarget {
             nextCurrentDirEntry = inEntry;
           }
 
-          // If this dialog attempts to open file(s) and the selection is a
-          // directory, the selection should be the current directory.
-          if (DialogType.isOpenFileDialog(this.dialogType) &&
-              inEntry.isDirectory) {
+          // If the |selectionURL| is a directory make it the current directory.
+          if (inEntry.isDirectory) {
             nextCurrentDirEntry = inEntry;
           }
 

ui/file_manager/integration_tests/file_manager/file_display.js

@@ -51,9 +51,9 @@ testcase.fileDisplayLaunchOnLocalFolder = async () => {
   // Wait for app window to open.
   const appId = await remoteCall.waitForWindow('files#');
 
-  // Check: the Downloads/photos folder should be selected.
-  await remoteCall.waitForElement(
-      appId, '#file-list [file-name="photos"][selected]');
+  // Check: The current directory is MyFiles/Downloads/photos.
+  await remoteCall.waitUntilCurrentDirectoryIsChanged(
+      appId, '/My files/Downloads/photos');
 
   // The API used to launch the Files app does not set the IN_TEST flag to true:
   // error when attempting to retrieve Web Store access token.