Make infobars ignore button clicks when closing.

chrome/browser/ui/gtk/infobars/infobar_gtk.h

 // Copyright (c) 2011 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_INFOBARS_INFOBAR_GTK_H_
 #define CHROME_BROWSER_UI_GTK_INFOBARS_INFOBAR_GTK_H_
 #pragma once
 
 #include <gtk/gtk.h>
 
@@ skipping 42 matching lines @@
  protected:
   // Spacing after message (and before buttons).
   static const int kEndOfLabelSpacing;
 
   // Creates a label with the appropriate font and color for the current
   // gtk-theme state. It is InfoBarGtk's responsibility to observe browser
   // theme changes and update the label's state.
   GtkWidget* CreateLabel(const std::string& text);
 
   // Creates a link button with the appropriate current gtk-theme state.
+  // NOTE: Subclasses must ignore link clicks if we're unowned.
   GtkWidget* CreateLinkButton(const std::string& text);
 
   // Adds |display_text| to the infobar. If |link_text| is not empty, it is
   // rendered as a hyperlink and inserted into |display_text| at |link_offset|,
   // or right aligned in the infobar if |link_offset| is |npos|. If a link is
   // supplied, |link_callback| must not be null. It will be invoked on click.
+  // NOTE: Subclasses must ignore link clicks if we're unowned.
   void AddLabelWithInlineLink(const string16& display_text,
                               const string16& link_text,
                               size_t link_offset,
                               GCallback callback);
 
   // InfoBar:
   virtual void PlatformSpecificShow(bool animate) OVERRIDE;
   virtual void PlatformSpecificOnHeightsRecalculated() OVERRIDE;
 
   // NotificationObserver:
@@ skipping 26 matching lines @@
   void UpdateBorderColor();
 
   // A GtkExpandedContainer that contains |bg_box_| so we can varry the height
   // of the infobar.
   ui::OwnedWidgetGtk widget_;
 
   DISALLOW_COPY_AND_ASSIGN(InfoBarGtk);
 };
 
 #endif  // CHROME_BROWSER_UI_GTK_INFOBARS_INFOBAR_GTK_H_