Makes the tabstrip center the active tab when transitioning from

chrome/browser/ui/views/tabs/touch_tab_strip_layout.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_VIEWS_TABS_TOUCH_TAB_STRIP_LAYOUT_H_
 #define CHROME_BROWSER_UI_VIEWS_TABS_TOUCH_TAB_STRIP_LAYOUT_H_
 
 #include "base/basictypes.h"
 #include "ui/gfx/size.h"
 #include "ui/views/view_model.h"
@@ skipping 63 matching lines @@
   // TouchTabStripLayout forces the active index to be in the normal tabs.
   int active_index() const {
     return active_index_ < mini_tab_count_ ? mini_tab_count_ : active_index_;
   }
 
   int mini_tab_count() const { return mini_tab_count_; }
 
   // Returns true if the tab at index is stacked.
   bool IsStacked(int index) const;
 
+  // Sets the location of the active tab as close to |x| as possible.
+  void SetActiveTabLocation(int x);
+
 #if !defined(NDEBUG)
   std::string BoundsString() const;
 #endif
 
  private:
   friend class TouchTabStripLayoutTest;
 
   // Sets the x-coordinate normal tabs start at, width mini-tab count and
   // active index at once.
   void Reset(int x, int width, int mini_tab_count, int active_index);
@@ skipping 118 matching lines @@
   // Number of mini-tabs.
   int mini_tab_count_;
 
   // Index of the active tab.
   int active_index_;
 
   DISALLOW_COPY_AND_ASSIGN(TouchTabStripLayout);
 };
 
 #endif  // CHROME_BROWSER_UI_VIEWS_TABS_TOUCH_TAB_STRIP_LAYOUT_H_