Making window.focus()/blur() work only when there is a user gesture.

chrome/browser/gtk/tabs/dragged_tab_controller_gtk.h

 // 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.
 
 #ifndef CHROME_BROWSER_GTK_TABS_DRAGGED_TAB_CONTROLLER_GTK_H_
 #define CHROME_BROWSER_GTK_TABS_DRAGGED_TAB_CONTROLLER_GTK_H_
 #pragma once
 
 #include <gtk/gtk.h>
 
@@ skipping 64 matching lines @@
                               WindowOpenDisposition disposition,
                               PageTransition::Type transition);
   virtual void NavigationStateChanged(const TabContents* source,
                                       unsigned changed_flags);
   virtual void AddNewContents(TabContents* source,
                               TabContents* new_contents,
                               WindowOpenDisposition disposition,
                               const gfx::Rect& initial_pos,
                               bool user_gesture);
   virtual void ActivateContents(TabContents* contents);
+  virtual void DeactivateContents(TabContents* contents);
   virtual void LoadingStateChanged(TabContents* source);
   virtual void CloseContents(TabContents* source);
   virtual void MoveContents(TabContents* source, const gfx::Rect& pos);
   virtual bool IsPopup(TabContents* source);
   virtual void ToolbarSizeChanged(TabContents* source, bool is_animating);
   virtual void URLStarredChanged(TabContents* source, bool starred);
   virtual void UpdateTargetURL(TabContents* source, const GURL& url);
 
   // Overridden from NotificationObserver:
   virtual void Observe(NotificationType type,
@@ skipping 166 matching lines @@
 
   // Timer used to bring the window under the cursor to front. If the user
   // stops moving the mouse for a brief time over a browser window, it is
   // brought to front.
   base::OneShotTimer<DraggedTabControllerGtk> bring_to_front_timer_;
 
   DISALLOW_COPY_AND_ASSIGN(DraggedTabControllerGtk);
 };
 
 #endif  // CHROME_BROWSER_GTK_TABS_DRAGGED_TAB_CONTROLLER_GTK_H_