Fixes bug where we would allow dragging tabs in incognito windows too

chrome/browser/ui/views/tabs/dragged_tab_controller.cc

 // Copyright (c) 2010 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/views/tabs/dragged_tab_controller.h"
 
 #include <math.h>
 #include <set>
 
 #include "app/animation.h"
@@ skipping 1003 matching lines @@
 
   gfx::Point tab_loc(x, y);
   views::View::ConvertPointToView(NULL, attached_tabstrip_, &tab_loc);
 
   x = tab_loc.x();
   y = tab_loc.y();
 
   const gfx::Size& tab_size = attached_tab_->bounds().size();
 
   if (attached_tabstrip_->type() == BaseTabStrip::HORIZONTAL_TAB_STRIP) {
-    int max_x = attached_tabstrip_->bounds().right() - tab_size.width();
+    int max_x = attached_tabstrip_->width() - tab_size.width();
     x = std::min(std::max(x, 0), max_x);
     y = 0;
   } else {
     x = SideTabStrip::kTabStripInset;
-    int max_y = attached_tabstrip_->bounds().bottom() - tab_size.height();
+    int max_y = attached_tabstrip_->height() - tab_size.height();
     y = std::min(std::max(y, SideTabStrip::kTabStripInset), max_y);
   }
   return gfx::Point(x, y);
 }
 
 BaseTab* DraggedTabController::GetTabMatchingDraggedContents(
     BaseTabStrip* tabstrip) const {
   int model_index =
       GetModel(tabstrip)->GetIndexOfTabContents(dragged_contents_);
   return model_index == TabStripModel::kNoTab ?
@@ skipping 296 matching lines @@
 #else
     NOTIMPLEMENTED();
 #endif
   }
 }
 
 TabStripModel* DraggedTabController::GetModel(BaseTabStrip* tabstrip) const {
   return static_cast<BrowserTabStripController*>(tabstrip->controller())->
       model();
 }