Turn pageAction.show -> browserAction.sensibleThing.

chrome/browser/ui/gtk/browser_actions_toolbar_gtk.cc

Index: chrome/browser/ui/gtk/browser_actions_toolbar_gtk.cc
diff --git a/chrome/browser/ui/gtk/browser_actions_toolbar_gtk.cc b/chrome/browser/ui/gtk/browser_actions_toolbar_gtk.cc
index 332395c435abf69362b9b2e55a0f25722b390d71..77f15558049ba20e96b79ebfd90956e94def5b2e 100644
--- a/chrome/browser/ui/gtk/browser_actions_toolbar_gtk.cc
+++ b/chrome/browser/ui/gtk/browser_actions_toolbar_gtk.cc
@@ -237,6 +237,8 @@ class BrowserActionButton : public content::NotificationObserver,
     } else if (default_icon_) {
       SetImage(default_icon_);
     }
+    UpdateEnabledness(tab_id);
+
     gtk_widget_queue_draw(button());
   }
 
@@ -279,6 +281,11 @@ class BrowserActionButton : public content::NotificationObserver,
     }
   }
 
+  void UpdateEnabledness(int tab_id) {
+    bool visible = extension_->browser_action()->GetIsVisible(tab_id);
+    gtk_widget_set_sensitive(button(), visible ? TRUE : FALSE);
+  }
+
   // MenuGtk::Delegate implementation.
   virtual void StoppedShowing() {
     button_->UnsetPaintOverride();