Revert 221579 "Files.app: Let the PreviewPanel class control the..."

trunk/src/chrome/browser/resources/file_manager/js/ui/preview_panel.js

Index: trunk/src/chrome/browser/resources/file_manager/js/ui/preview_panel.js
===================================================================
--- trunk/src/chrome/browser/resources/file_manager/js/ui/preview_panel.js	(revision 221612)
+++ trunk/src/chrome/browser/resources/file_manager/js/ui/preview_panel.js	(working copy)
@@ -92,11 +92,11 @@
  */
 PreviewPanel.VisibilityType = Object.freeze({
   // Preview panel always shows.
-  ALWAYS_VISIBLE: 'alwaysVisible',
+  ALWAYS: 'always',
   // Preview panel shows when the entries property are set.
   AUTO: 'auto',
   // Preview panel does not show.
-  ALWAYS_HIDDEN: 'alwaysHidden'
+  HIDDEN: 'hidden'
 });
 
 /**
@@ -168,14 +168,14 @@
   var visibility = this.element_.getAttribute('visibility');
   var newVisible = null;
   switch (this.visibilityType_) {
-    case PreviewPanel.VisibilityType.ALWAYS_VISIBLE:
+    case PreviewPanel.VisibilityType.ALWAYS:
       newVisible = true;
       break;
     case PreviewPanel.VisibilityType.AUTO:
       newVisible = this.entries_.length != 0 ||
                    !PathUtil.isRootPath(this.currentPath_);
       break;
-    case PreviewPanel.VisibilityType.ALWAYS_HIDDEN:
+    case PreviewPanel.VisibilityType.HIDDEN:
       newVisible = false;
       break;
     default: