Gets tab dragging to work in touch mode.

ui/views/view_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 UI_VIEWS_VIEW_MODEL_H_
 #define UI_VIEWS_VIEW_MODEL_H_
 #pragma once
 
 #include <vector>
 
@@ skipping 21 matching lines @@
   void Add(View* view, int index);
 
   // Removes the view at the specified index. This does not actually remove the
   // view from the view hierarchy.
   void Remove(int index);
 
   // Moves the view at |index| to |target_index|. |target_index| is in terms
   // of the model *after* the view at |index| is removed.
   void Move(int index, int target_index);
 
+  // Variant of Move() that leaves the bounds as is. That is, after invoking
+  // this the bounds of the view at |target_index| (and all other indices) are
+  // exactly the same as the bounds of the view at |target_index| before
+  // invoking this.
+  void MoveViewOnly(int index, int target_index);
+
   // Returns the number of views.
   int view_size() const { return static_cast<int>(entries_.size()); }
 
   // Removes and deletes all the views.
   void Clear();
 
   // Returns the view at the specified index.
   View* view_at(int index) const {
     check_index(index);
     return entries_[index].view;
@@ skipping 32 matching lines @@
 #endif
 
   Entries entries_;
 
   DISALLOW_COPY_AND_ASSIGN(ViewModel);
 };
 
 }  // namespace views
 
 #endif  // UI_VIEWS_VIEW_MODEL_H_