filemanager: Files App change necessary to use "drive/root". It still works with "drive".

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

 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 // This variable is checked in SelectFileDialogExtensionBrowserTest.
 var JSErrorCount = 0;
 
 /**
  * Count uncaught exceptions.
  */
@@ skipping 1297 matching lines @@
       tracker.exceptInitialChange = true;
       tracker.start();
       if (!this.isDriveEnabled()) {
         if (pageLoading)
           this.show_();
         var leafName = path.substr(path.indexOf('/') + 1);
         path = this.directoryModel_.getDefaultDirectory() + '/' + leafName;
         this.finishSetupCurrentDirectory_(path, invokeHandlers);
         return;
       }
-      var drivePath = RootDirectory.DRIVE;
-      if (this.volumeManager_.isMounted(drivePath)) {
+      if (this.volumeManager_.isMounted(RootDirectory.DRIVE)) {
         this.finishSetupCurrentDirectory_(path, invokeHandlers);
         return;
       }
       if (pageLoading)
         this.delayShow_(500);
       // Reflect immediatelly in the UI we are on Drive and display
       // mounting UI.
-      this.directoryModel_.setupPath(drivePath);
+      this.directoryModel_.setupPath(RootDirectory.DRIVE);
 
       if (!this.isOnDrive()) {
         // Since DRIVE is not mounted it should be resolved synchronously
         // (no need in asynchronous calls to filesystem API). It is important
         // to prevent race condition.
         console.error('Expected path set up synchronously');
       }
 
       var self = this;
       this.volumeManager_.mountDrive(function() {
@@ skipping 754 matching lines @@
    */
   FileManager.prototype.onDirectoryChanged_ = function(event) {
     this.selectionHandler_.onFileSelectionChanged();
     this.updateSearchBoxOnDirChange_();
     if (this.dialogType == DialogType.FULL_PAGE)
       this.table_.showOfflineColumn(this.shouldShowOfflineColumn());
 
     util.updateAppState(event.initial, this.getCurrentDirectory());
 
     if (this.closeOnUnmount_ && !event.initial &&
-          PathUtil.getRootPath(event.previousDirEntry.fullPath) !=
-          PathUtil.getRootPath(event.newDirEntry.fullPath)) {
+        PathUtil.getRootPath(event.previousDirEntry.fullPath) !=
+            PathUtil.getRootPath(event.newDirEntry.fullPath)) {
       this.closeOnUnmount_ = false;
     }
 
     this.updateUnformattedDriveStatus_();
     this.updateTitle_();
     this.updateGearMenu_();
   };
 
+  // TODO(haruki): Rename this method. "Drive" here does not refer
+  // "Google Drive".
   FileManager.prototype.updateUnformattedDriveStatus_ = function() {
     var volumeInfo = this.volumeManager_.getVolumeInfo_(
-        this.directoryModel_.getCurrentRootPath());
+        PathUtil.getRootPath(this.directoryModel_.getCurrentRootPath()));
 
     if (volumeInfo.error) {
       this.dialogDom_.setAttribute('unformatted', '');
 
       var errorNode = this.dialogDom_.querySelector('#format-panel > .error');
       if (volumeInfo.error == VolumeManager.Error.UNSUPPORTED_FILESYSTEM) {
         errorNode.textContent = str('UNSUPPORTED_FILESYSTEM_WARNING');
       } else {
         errorNode.textContent = str('UNKNOWN_FILESYSTEM_WARNING');
       }
@@ skipping 1038 matching lines @@
       callback(this.preferences_);
       return;
     }
 
     chrome.fileBrowserPrivate.getPreferences(function(prefs) {
       this.preferences_ = prefs;
       callback(prefs);
     }.bind(this));
   };
 })();