Auto-size the views version of the options dialog.

views/widget/widget_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 VIEWS_WIDGET_WIDGET_GTK_H_
 #define VIEWS_WIDGET_WIDGET_GTK_H_
 
 #include <gtk/gtk.h>
 
 #include "app/active_window_watcher_x.h"
@@ skipping 205 matching lines @@
       return true;
     }
     return false;
   }
 
   // Returns the view::Event::flags for a GdkEventButton.
   static int GetFlagsForEventButton(const GdkEventButton& event);
 
   // Event handlers:
   CHROMEGTK_CALLBACK_1(WidgetGtk, gboolean, OnButtonPress, GdkEventButton*);
+  CHROMEGTK_CALLBACK_1(WidgetGtk, void, OnSizeRequest, GtkRequisition*);
   CHROMEGTK_CALLBACK_1(WidgetGtk, void, OnSizeAllocate, GtkAllocation*);
   CHROMEGTK_CALLBACK_1(WidgetGtk, gboolean, OnPaint, GdkEventExpose*);
   CHROMEGTK_CALLBACK_4(WidgetGtk, void, OnDragDataGet,
                        GdkDragContext*, GtkSelectionData*, guint, guint);
   CHROMEGTK_CALLBACK_6(WidgetGtk, void, OnDragDataReceived,
                        GdkDragContext*, gint, gint, GtkSelectionData*,
                        guint, guint);
   CHROMEGTK_CALLBACK_4(WidgetGtk, gboolean, OnDragDrop,
                        GdkDragContext*, gint, gint, guint);
   CHROMEGTK_CALLBACK_1(WidgetGtk, void, OnDragEnd, GdkDragContext*);
@@ skipping 197 matching lines @@
   // If true, we enable the content widget's double buffering.
   // This is false by default.
   bool is_double_buffered_;
 
   DISALLOW_COPY_AND_ASSIGN(WidgetGtk);
 };
 
 }  // namespace views
 
 #endif  // VIEWS_WIDGET_WIDGET_GTK_H_