Revert "Fix a ton of compiler warnings."

chrome/browser/gtk/slide_animator_gtk.h

 // Copyright (c) 2009 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.
 //
 // A helper class for animating the display of native widget content.
 // Currently only handle vertical sliding, but could be extended to handle
 // horizontal slides or other types of animations.
 //
 // NOTE: This does not handle clipping. If you are not careful, you will
 // wind up with visibly overlapping widgets. If you need clipping, you can
@@ skipping 10 matching lines @@
 #include "chrome/common/owned_widget_gtk.h"
 
 class SlideAnimation;
 
 class SlideAnimatorGtk : public AnimationDelegate {
  public:
   class Delegate {
    public:
     // Called when a call to Close() finishes animating.
     virtual void Closed() = 0;
-
-   protected:
-    ~Delegate() {}
   };
 
   enum Direction {
     DOWN,
     UP
   };
 
   // |child| is the widget we pack into |widget_|.
   // |direction| indicates which side the contents will appear to come from.
   // |duration| is the duration of the slide in milliseconds, or 0 for default.
@@ skipping 62 matching lines @@
   bool fixed_needs_resize_;
 
   // We need to move the child widget to (0, -height), but we don't know its
   // height until it has been allocated. This variable will be true until the
   // child widget has been allocated, at which point we will move it, and then
   // set this variable to false to indicate it should not be moved again.
   bool child_needs_move_;
 };
 
 #endif  // CHROME_BROWSER_GTK_SLIDE_ANIMATOR_GTK_H_