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

chrome/browser/ui/fullscreen/fullscreen_exit_bubble.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_FULLSCREEN_FULLSCREEN_EXIT_BUBBLE_H_
 #define CHROME_BROWSER_UI_FULLSCREEN_FULLSCREEN_EXIT_BUBBLE_H_
 
 #include "base/timer.h"
 #include "chrome/browser/ui/fullscreen/fullscreen_exit_bubble_type.h"
 #include "googleurl/src/gurl.h"
@@ skipping 38 matching lines @@
 
   // Hides the bubble.  This is a separate function so it can be called by a
   // timer.
   virtual void Hide() = 0;
 
   // Shows the bubble.
   virtual void Show() = 0;
 
   virtual bool IsAnimating() = 0;
 
+  // True if the mouse position can trigger sliding in the exit fullscreen
+  // bubble when the bubble is hidden.
+  virtual bool CanMouseTriggerSlideIn() const = 0;
+
+  void StartWatchingMouse();
+  void StopWatchingMouse();
+  bool IsWatchingMouse() const;
+
   // Called repeatedly to get the current mouse position and animate the bubble
   // on or off the screen as appropriate.
   void CheckMousePosition();
 
-  void StartWatchingMouse();
-  void StopWatchingMouse();
-
   void ToggleFullscreen();
   // Accepts the request. Can cause FullscreenExitBubble to be deleted.
   void Accept();
   // Denys the request. Can cause FullscreenExitBubble to be deleted.
   void Cancel();
 
   // The following strings may change according to the content type and URL.
   string16 GetCurrentMessageText() const;
   string16 GetCurrentDenyButtonText() const;
 
@@ skipping 25 matching lines @@
   base::RepeatingTimer<FullscreenExitBubble> mouse_position_checker_;
 
   // The most recently seen mouse position, in screen coordinates.  Used to see
   // if the mouse has moved since our last check.
   gfx::Point last_mouse_pos_;
 
   DISALLOW_COPY_AND_ASSIGN(FullscreenExitBubble);
 };
 
 #endif  // CHROME_BROWSER_UI_FULLSCREEN_FULLSCREEN_EXIT_BUBBLE_H_