Compute the correct height above the tabstrip when dragging tabs.

chrome/browser/ui/views/tabs/tab_strip.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_TAB_STRIP_H_
 #define CHROME_BROWSER_UI_VIEWS_TABS_TAB_STRIP_H_
 
 #include <vector>
 
 #include "base/compiler_specific.h"
@@ skipping 39 matching lines @@
 //      DraggedTab, focusing on tasks that require reshuffling other tabs
 //      in response to dragged tabs.
 //
 ///////////////////////////////////////////////////////////////////////////////
 class TabStrip : public views::View,
                  public views::ButtonListener,
                  public views::MouseWatcherListener,
                  public views::ViewTargeterDelegate,
                  public TabController {
  public:
-  // The vertical offset of the tab strip button. This offset applies only to
-  // restored windows.
-  static const int kNewTabButtonVerticalOffset;
-
   explicit TabStrip(TabStripController* controller);
   ~TabStrip() override;
 
   // Add and remove observers to changes within this TabStrip.
   void AddObserver(TabStripObserver* observer);
   void RemoveObserver(TabStripObserver* observer);
 
   // If |adjust_layout| is true the stacked layout changes based on whether the
   // user uses a mouse or a touch device with the tabstrip.
   void set_adjust_layout(bool adjust_layout) { adjust_layout_ = adjust_layout; }
@@ skipping 577 matching lines @@
   bool immersive_style_;
 
   // Our observers.
   typedef base::ObserverList<TabStripObserver> TabStripObservers;
   TabStripObservers observers_;
 
   DISALLOW_COPY_AND_ASSIGN(TabStrip);
 };
 
 #endif  // CHROME_BROWSER_UI_VIEWS_TABS_TAB_STRIP_H_