revert 22226 as it caused some ui test crashes

chrome/browser/gtk/gtk_chrome_link_button.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.
 
 // Creates a link button that shows |text| in blue and underlined. The cursor
 // changes to a hand when over the link.  This is like the GTK LinkButton, but
 // it doesn't call the global URI link handler, etc.  It is a button subclass,
 // so you can just handle the clicked signal.
 
 #ifndef CHROME_BROWSER_GTK_GTK_CHROME_LINK_BUTTON_H_
@@ skipping 22 matching lines @@
 
 typedef struct _GtkChromeLinkButton        GtkChromeLinkButton;
 typedef struct _GtkChromeLinkButtonClass   GtkChromeLinkButtonClass;
 
 struct _GtkChromeLinkButton {
   GtkButton button;
   GtkWidget* label;
   gchar* blue_markup;
   gchar* red_markup;
   gboolean is_blue;
-  gchar* native_markup;
-  gboolean using_native_theme;
   GdkCursor* hand_cursor;
   GdkEventButton* click_button_event;
-  gchar* text;
-  gboolean uses_markup;
 };
 
 struct _GtkChromeLinkButtonClass {
   GtkButtonClass parent_class;
 };
 
 // Make a link button with display text |text|.
 GtkWidget* gtk_chrome_link_button_new(const char* text);
 
 // As above, but don't escape markup in the text.
 GtkWidget* gtk_chrome_link_button_new_with_markup(const char* markup);
 
-// Set whether the link button draws natively (using "link-color"). The default
-// is TRUE.
-void gtk_chrome_link_button_set_use_gtk_theme(GtkChromeLinkButton* button,
-                                              gboolean use_gtk);
-
 // Call this from within a "clicked" handler to get the release event that
 // triggered the click. It will return NULL if the click was triggered by a
 // keyboard event.
 const GdkEventButton* gtk_chrome_link_button_get_event_for_click(
     GtkChromeLinkButton* button);
 
 GType gtk_chrome_link_button_get_type();
 
 G_END_DECLS
 
 #endif  // CHROME_BROWSER_GTK_GTK_CHROME_LINK_BUTTON_H_