Stack preview back at top after an active contents switch.

chrome/browser/ui/views/frame/contents_container.h

 // Copyright 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.
 
 #ifndef CHROME_BROWSER_UI_VIEWS_FRAME_CONTENTS_CONTAINER_H_
 #define CHROME_BROWSER_UI_VIEWS_FRAME_CONTENTS_CONTAINER_H_
 
 #include <string>
 
 #include "base/basictypes.h"
@@ skipping 27 matching lines @@
   // Makes the preview view the active view and nulls out the old active view.
   // The caller must delete or remove the old active view separately.
   void MakePreviewContentsActiveContents();
 
   // Sets the preview view. This does not delete the old.
   void SetPreview(views::WebView* preview,
                   content::WebContents* preview_web_contents,
                   int height,
                   InstantSizeUnits units);
 
+  // When the active content is reset and we have a visible preview,
+  // the preview must be stacked back at top.
+  void MaybeStackPreviewAtTop();
+
   content::WebContents* preview_web_contents() const {
     return preview_web_contents_;
   }
 
   // Sets the active top margin.
   void SetActiveTopMargin(int margin);
 
   // Returns the bounds the preview would be shown at.
   gfx::Rect GetPreviewBounds() const;
 
@@ skipping 25 matching lines @@
   int preview_height_;
   InstantSizeUnits preview_height_units_;
 
   // Used to extend the child WebView beyond the contents view bottom bound.
   int extra_content_height_;
 
   DISALLOW_COPY_AND_ASSIGN(ContentsContainer);
 };
 
 #endif  // CHROME_BROWSER_UI_VIEWS_FRAME_CONTENTS_CONTAINER_H_