Handful of tweaks for tab dragging with touch:

chrome/browser/ui/views/tabs/tab_strip.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 "chrome/browser/ui/views/tabs/tab_strip.h"
 
 #if defined(OS_WIN)
 #include <windowsx.h>
 #endif
 
@@ skipping 984 matching lines @@
   if (!original_selection.IsSelected(model_index))
     selection_model.Copy(original_selection);
   // Delete the existing DragController before creating a new one. We do this as
   // creating the DragController remembers the WebContents delegates and we need
   // to make sure the existing DragController isn't still a delegate.
   drag_controller_.reset();
   TabDragController::DetachBehavior detach_behavior =
       TabDragController::DETACHABLE;
   TabDragController::MoveBehavior move_behavior =
       TabDragController::REORDER;
-  // Use MOVE_VISIBILE_TABS in the following two conditions:
+  // Use MOVE_VISIBILE_TABS in the following conditions:
   // . Mouse event generated from touch and the left button is down (the right
   //   button corresponds to a long press, which we want to reorder).
+  // . Gesture begin and control key isn't down.
   // . Real mouse event and control is down. This is mostly for testing.
   DCHECK(event.type() == ui::ET_MOUSE_PRESSED ||
          event.type() == ui::ET_GESTURE_BEGIN);
-  if (touch_layout_.get() &&
+  if (adjust_layout_ &&
       ((event.type() == ui::ET_MOUSE_PRESSED &&
         (((event.flags() & ui::EF_FROM_TOUCH) &&
           static_cast<const views::MouseEvent&>(event).IsLeftMouseButton()) ||
          (!(event.flags() & ui::EF_FROM_TOUCH) &&
           static_cast<const views::MouseEvent&>(event).IsControlDown()))) ||
-       (event.type() == ui::ET_GESTURE_BEGIN))) {
+       (event.type() == ui::ET_GESTURE_BEGIN && !event.IsControlDown()))) {
     move_behavior = TabDragController::MOVE_VISIBILE_TABS;
   }
 #if defined(OS_WIN)
   // It doesn't make sense to drag tabs out on metro.
   if (base::win::IsMetroProcess())
     detach_behavior = TabDragController::NOT_DETACHABLE;
 #endif
   // Gestures don't automatically do a capture. We don't allow multiple drags at
   // the same time, so we explicitly capture.
   if (event.type() == ui::ET_GESTURE_BEGIN)
@@ skipping 1320 matching lines @@
 
   int mini_tab_count = GetMiniTabCount();
   int normal_count = tab_count() - mini_tab_count;
   if (normal_count <= 1 || normal_count == mini_tab_count)
     return false;
   int x = GetStartXForNormalTabs();
   int available_width = width() - x - new_tab_button_width();
   return (Tab::GetTouchWidth() * normal_count +
           tab_h_offset() * (normal_count - 1)) > available_width;
 }