Animate the fullscreen exit bubble's opacity instead of its bounds when in immersive fullscreen

chrome/browser/ui/gtk/fullscreen_exit_bubble_gtk.h

 // 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.
 
 #ifndef CHROME_BROWSER_UI_GTK_FULLSCREEN_EXIT_BUBBLE_GTK_H_
 #define CHROME_BROWSER_UI_GTK_FULLSCREEN_EXIT_BUBBLE_GTK_H_
 
 #include "chrome/browser/ui/fullscreen/fullscreen_exit_bubble.h"
 #include "chrome/browser/ui/fullscreen/fullscreen_exit_bubble_type.h"
 #include "chrome/browser/ui/gtk/slide_animator_gtk.h"
@@ skipping 24 matching lines @@
                      FullscreenExitBubbleType bubble_type);
  protected:
   // FullScreenExitBubble
   virtual gfx::Rect GetPopupRect(bool ignore_animation_state) const OVERRIDE;
   virtual gfx::Point GetCursorScreenPoint() OVERRIDE;
   virtual bool WindowContainsPoint(gfx::Point pos) OVERRIDE;
   virtual bool IsWindowActive() OVERRIDE;
   virtual void Hide() OVERRIDE;
   virtual void Show() OVERRIDE;
   virtual bool IsAnimating() OVERRIDE;
+  virtual bool CanMouseTriggerSlideIn() const OVERRIDE;
 
  private:
   void InitWidgets();
   std::string GetMessage(const GURL& url);
   void StartWatchingMouseIfNecessary();
 
   GtkWidget* widget() const {
     return slide_widget_->widget();
   }
 
@@ skipping 31 matching lines @@
   base::OneShotTimer<FullscreenExitBubbleGtk> initial_delay_;
 
   ui::GtkSignalRegistrar signals_;
 
   content::NotificationRegistrar registrar_;
 
   DISALLOW_COPY_AND_ASSIGN(FullscreenExitBubbleGtk);
 };
 
 #endif  // CHROME_BROWSER_UI_GTK_FULLSCREEN_EXIT_BUBBLE_GTK_H_