Gets tab dragging to work in touch mode.

ui/views/view_model.cc

 // 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.
 
 #include "ui/views/view_model.h"
 
 #include "base/logging.h"
 #include "ui/views/view.h"
 
 namespace views {
@@ skipping 22 matching lines @@
 }
 
 void ViewModel::Move(int index, int target_index) {
   if (index == target_index)
     return;
   Entry entry(entries_[index]);
   entries_.erase(entries_.begin() + index);
   entries_.insert(entries_.begin() + target_index, entry);
 }
 
+void ViewModel::MoveViewOnly(int index, int target_index) {
+  if (index == target_index)
+    return;
+  if (target_index < index) {
+    View* view = entries_[index].view;
+    for (int i = index; i > target_index; --i)
+      entries_[i].view = entries_[i - 1].view;
+    entries_[target_index].view = view;
+  } else {
+    View* view = entries_[index].view;
+    for (int i = index; i < target_index; ++i)
+      entries_[i].view = entries_[i + 1].view;
+    entries_[target_index].view = view;
+  }
+}
+
 void ViewModel::Clear() {
   Entries entries;
   entries.swap(entries_);
   for (size_t i = 0; i < entries.size(); ++i)
     delete entries[i].view;
 }
 
 int ViewModel::GetIndexOfView(const View* view) const {
   for (size_t i = 0; i < entries_.size(); ++i) {
     if (entries_[i].view == view)
       return static_cast<int>(i);
   }
   return -1;
 }
 
 }  // namespace views