Fix legacy UI in Files.app.

chrome/browser/resources/file_manager/js/file_manager.js

Index: chrome/browser/resources/file_manager/js/file_manager.js
diff --git a/chrome/browser/resources/file_manager/js/file_manager.js b/chrome/browser/resources/file_manager/js/file_manager.js
index 05df67323553426f66414ce04e1f68b7a461359c..e753bdd2efa75a67c35a1614d4fa47a5ff15fe39 100644
--- a/chrome/browser/resources/file_manager/js/file_manager.js
+++ b/chrome/browser/resources/file_manager/js/file_manager.js
@@ -769,7 +769,10 @@ DialogType.isModal = function(type) {
          dom.querySelector('#search-breadcrumbs'), this.metadataCache_);
     this.searchBreadcrumbs_.addEventListener(
          'pathclick', this.onBreadcrumbClick_.bind(this));
-    this.searchBreadcrumbs_.setHideLast(true);
+    if (!util.platform.newUI())
+      this.searchBreadcrumbs_.setHideLast(true);
+    else
+      this.searchBreadcrumbs_.setHideLast(false);
 
     var fullPage = this.dialogType == DialogType.FULL_PAGE;
     FileTable.decorate(this.table_, this.metadataCache_, fullPage);
@@ -1062,10 +1065,11 @@ DialogType.isModal = function(type) {
   FileManager.prototype.initSidebar_ = function() {
     this.directoryTree_ = this.dialogDom_.querySelector('#directory-tree');
     DirectoryTree.decorate(this.directoryTree_, this.directoryModel_);
-    this.directoryTree_.addEventListener('content-updated', function() {
-      this.updateMiddleBarVisibility_(true);
-    }.bind(this));
     if (util.platform.newUI()) {
+      this.directoryTree_.addEventListener('content-updated', function() {
+        this.updateMiddleBarVisibility_(true);
+      }.bind(this));
+
       this.volumeList_ = this.dialogDom_.querySelector('#volume-list');
       VolumeList.decorate(this.volumeList_, this.directoryModel_);
     }
@@ -1428,11 +1432,12 @@ DialogType.isModal = function(type) {
           this.table_.normalizeColumns();
       }
       this.table_.redraw();
-      this.volumeList_.redraw();
     }
 
     if (!util.platform.newUI())
       this.breadcrumbs_.truncate();
+    else
+      this.volumeList_.redraw();
 
     // Hide the search box if there is not enough space.
     if (util.platform.newUI())
@@ -2045,6 +2050,17 @@ DialogType.isModal = function(type) {
         this.directoryModel_.getCurrentDirectoryURL();
   };
 
+  /**
+   * Return DirectoryEntry of the current directory or null.
+   * @return {DirectoryEntry} DirectoryEntry of the current directory. Returns
+   *     null if the directory model is not ready or the current directory is
+   *     not set.
+   */
+  FileManager.prototype.getCurrentDirectoryEntry = function() {
+    return this.directoryModel_ &&
+        this.directoryModel_.getCurrentDirEntry();
+  };
+
   FileManager.prototype.deleteSelection = function() {
     // TODO(mtomasz): Remove this temporary dialog. crbug.com/167364
     var entries = this.getSelection().entries;
@@ -2547,7 +2563,8 @@ DialogType.isModal = function(type) {
       }
       this.table_.list.endBatchUpdates();
       this.grid_.endBatchUpdates();
-      this.updateMiddleBarVisibility_();
+      if (util.platform.newUI())
+        this.updateMiddleBarVisibility_();
       this.scanCompletedTimer_ = null;
     }.bind(this), 50);
   };
@@ -2580,7 +2597,8 @@ DialogType.isModal = function(type) {
       this.hideSpinnerLater_();
       this.table_.list.endBatchUpdates();
       this.grid_.endBatchUpdates();
-      this.updateMiddleBarVisibility_();
+      if (util.platform.newUI())
+        this.updateMiddleBarVisibility_();
       this.scanUpdatedTimer_ = null;
     }.bind(this), 200);
   };
@@ -2609,7 +2627,8 @@ DialogType.isModal = function(type) {
       this.scanInProgress_ = false;
       this.table_.list.endBatchUpdates();
       this.grid_.endBatchUpdates();
-      this.updateMiddleBarVisibility_();
+      if (util.platform.newUI())
+        this.updateMiddleBarVisibility_();
     }
   };