Fixes possible flicker when tab finishes animating back to dragged...

chrome/browser/views/tabs/dragged_tab_controller.cc

 // Copyright (c) 2006-2008 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 <math.h>
 #include <set>
 
 #include "chrome/browser/views/tabs/dragged_tab_controller.h"
 
 #include "chrome/browser/browser_window.h"
@@ skipping 1116 matching lines @@
     source_tabstrip_->DestroyDraggedSourceTab(source_tab_);
     source_tab_ = NULL;
   }
 }
 
 void DraggedTabController::OnAnimateToBoundsComplete() {
   // Sometimes, for some reason, in automation we can be called back on a
   // detach even though we aren't attached to a TabStrip. Guard against that.
   if (attached_tabstrip_) {
     Tab* tab = GetTabMatchingDraggedContents(attached_tabstrip_);
-    if (tab)
+    if (tab) {
       tab->SetVisible(true);
+      // Paint the tab now, otherwise there may be slight flicker between the
+      // time the dragged tab window is destroyed and we paint.
+      tab->PaintNow();
+    }
   }
   CleanUpHiddenFrame();
 
   if (!in_destructor_)
     source_tabstrip_->DestroyDragController();
 }
 
 void DraggedTabController::DockDisplayerDestroyed(
     DockDisplayer* controller) {
   std::set<HWND>::iterator dock_i =
       dock_windows_.find(controller->popup_hwnd());
   if (dock_i != dock_windows_.end())
     dock_windows_.erase(dock_i);
   else
     NOTREACHED();
 
   std::vector<DockDisplayer*>::iterator i =
       std::find(dock_controllers_.begin(), dock_controllers_.end(),
                 controller);
   if (i != dock_controllers_.end())
     dock_controllers_.erase(i);
   else
     NOTREACHED();
 }