Change visibility semantics for Instant.

chrome/browser/ui/gtk/tab_contents_container_gtk.h

Index: chrome/browser/ui/gtk/tab_contents_container_gtk.h
diff --git a/chrome/browser/ui/gtk/tab_contents_container_gtk.h b/chrome/browser/ui/gtk/tab_contents_container_gtk.h
index 76851bdc9de0b57f90e9d520000b26310f538313..7e2f910f26fdc13df28bc9cd48604f931492b8d3 100644
--- a/chrome/browser/ui/gtk/tab_contents_container_gtk.h
+++ b/chrome/browser/ui/gtk/tab_contents_container_gtk.h
@@ -36,13 +36,11 @@ class TabContentsContainerGtk : public content::NotificationObserver,
   void SetTab(TabContents* tab);
   TabContents* tab() const { return tab_; }
 
-  // Returns the TabContents currently displayed.
-  TabContents* GetVisibleTab();
-
+  void SetPreview(TabContents* preview);
   bool HasPreview() const { return preview_ != NULL; }
 
-  void SetPreview(TabContents* preview);
-  void PopPreview();
+  // Returns the TabContents currently displayed.
+  TabContents* GetVisibleTab() const { return preview_ ? preview_ : tab_; }
 
   // Remove the tab from the hierarchy.
   void DetachTab(TabContents* tab);
@@ -75,9 +73,6 @@ class TabContentsContainerGtk : public content::NotificationObserver,
   // Stops showing |tab|.
   void HideTab(TabContents* tab);
 
-  // Removes |preview_|.
-  void RemovePreview();
-
   // Handle focus traversal on the tab contents container. Focus should not
   // traverse to the preview contents.
   CHROMEGTK_CALLBACK_1(TabContentsContainerGtk, gboolean, OnFocus,