Make bookmark bar folder buttons look active so long as the menu is open....

chrome/browser/gtk/gtk_chrome_button.cc

Index: chrome/browser/gtk/gtk_chrome_button.cc
===================================================================
--- chrome/browser/gtk/gtk_chrome_button.cc	(revision 20108)
+++ chrome/browser/gtk/gtk_chrome_button.cc	(working copy)
@@ -39,6 +39,13 @@
                                          GdkEventExpose* event);
 
 static void gtk_chrome_button_class_init(GtkChromeButtonClass* button_class) {
+  gtk_rc_parse_string(
+      "style \"chrome-button\" {"
+      "  GtkButton::child-displacement-x = 0"
+      "  GtkButton::child-displacement-y = 0"
+      "}"
+      "widget \"*chrome-button\" style \"chrome-button\"");
+
   GObjectClass* gobject_class = G_OBJECT_CLASS(button_class);
   GtkWidgetClass* widget_class = reinterpret_cast<GtkWidgetClass*>(button_class);
   widget_class->expose_event = gtk_chrome_button_expose;
@@ -73,6 +80,7 @@
   priv->paint_state = -1;
   priv->use_gtk_rendering = FALSE;
 
+  gtk_widget_set_name(GTK_WIDGET(button), "chrome-button");
   gtk_widget_set_app_paintable(GTK_WIDGET(button), TRUE);
 
   GTK_WIDGET_UNSET_FLAGS(button, GTK_CAN_FOCUS);