Gtk/extensions: Convert a crash into a NOTREACHED().

chrome/browser/gtk/browser_actions_toolbar_gtk.cc

Index: chrome/browser/gtk/browser_actions_toolbar_gtk.cc
===================================================================
--- chrome/browser/gtk/browser_actions_toolbar_gtk.cc	(revision 29354)
+++ chrome/browser/gtk/browser_actions_toolbar_gtk.cc	(working copy)
@@ -197,7 +197,7 @@
 
   for (size_t i = 0; i < browser_actions.size(); ++i) {
     Extension* extension = extension_service->GetExtensionById(
-        browser_actions[i]->id());
+        browser_actions[i]->extension_id());
     CreateButtonForExtension(extension);
   }
 }
@@ -214,13 +214,13 @@
       new BrowserActionButton(browser_, extension));
   gtk_box_pack_end(GTK_BOX(hbox_.get()), button->widget(), FALSE, FALSE, 0);
   gtk_widget_show(button->widget());
-  extension_button_map_[extension->id()] = button;
+  extension_button_map_[extension->extension_id()] = button;
 
   UpdateVisibility();
 }
 
 void BrowserActionsToolbarGtk::RemoveButtonForExtension(Extension* extension) {
-  if (extension_button_map_.erase(extension->id()))
+  if (extension_button_map_.erase(extension->extension_id()))
     UpdateVisibility();
 }