Remove TabContents from AddBlankTabAt, kill AddBlankTab.

chrome/browser/ui/tabs/tab_strip_model.h

 // 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.
 
 #ifndef CHROME_BROWSER_UI_TABS_TAB_STRIP_MODEL_H_
 #define CHROME_BROWSER_UI_TABS_TAB_STRIP_MODEL_H_
 
 #include <vector>
 
 #include "base/memory/scoped_ptr.h"
@@ skipping 396 matching lines @@
 
   const TabStripSelectionModel& selection_model() const {
     return selection_model_;
   }
 
   // Command level API /////////////////////////////////////////////////////////
 
   // Adds a TabContents at the best position in the TabStripModel given
   // the specified insertion index, transition, etc. |add_types| is a bitmask of
   // AddTabTypes; see it for details. This method ends up calling into
-  // InsertTabContentsAt to do the actual insertion.
+  // InsertTabContentsAt to do the actual insertion. Pass -1 for |index| to
+  // append the contents to the end of the tab strip.
   void AddTabContents(TabContents* contents,
                       int index,
                       content::PageTransition transition,
                       int add_types);
 
   // Closes the selected tabs.
   void CloseSelectedTabs();
 
   // Select adjacent tabs
   void SelectNextTab();
@@ skipping 248 matching lines @@
 
   // A scoped container for notification registries.
   content::NotificationRegistrar registrar_;
 
   TabStripSelectionModel selection_model_;
 
   DISALLOW_IMPLICIT_CONSTRUCTORS(TabStripModel);
 };
 
 #endif  // CHROME_BROWSER_UI_TABS_TAB_STRIP_MODEL_H_