Add support for XF86Back and friends.

chrome/browser/gtk/browser_toolbar_gtk.cc

Index: chrome/browser/gtk/browser_toolbar_gtk.cc
===================================================================
--- chrome/browser/gtk/browser_toolbar_gtk.cc	(revision 18918)
+++ chrome/browser/gtk/browser_toolbar_gtk.cc	(working copy)
@@ -5,6 +5,7 @@
 #include "chrome/browser/gtk/browser_toolbar_gtk.h"
 
 #include <gdk/gdkkeysyms.h>
+#include <X11/XF86keysym.h>
 
 #include "app/l10n_util.h"
 #include "app/resource_bundle.h"
@@ -116,12 +117,14 @@
                      FALSE, 0);
   AddAcceleratorToButton(back_->widget(), GDK_Left, GDK_MOD1_MASK);
   AddAcceleratorToButton(back_->widget(), GDK_BackSpace, 0);
+  AddAcceleratorToButton(back_->widget(), XF86XK_Back, 0);
 
   forward_.reset(new BackForwardButtonGtk(browser_, true));
   gtk_box_pack_start(GTK_BOX(back_forward_hbox_), forward_->widget(), FALSE,
                      FALSE, 0);
   AddAcceleratorToButton(forward_->widget(), GDK_Right, GDK_MOD1_MASK);
   AddAcceleratorToButton(forward_->widget(), GDK_BackSpace, GDK_SHIFT_MASK);
+  AddAcceleratorToButton(forward_->widget(), XF86XK_Forward, 0);
   gtk_box_pack_start(GTK_BOX(toolbar_), back_forward_hbox_, FALSE, FALSE, 0);
 
   reload_.reset(BuildToolbarButton(IDR_RELOAD, IDR_RELOAD_P, IDR_RELOAD_H, 0,
@@ -129,6 +132,8 @@
   AddAcceleratorToButton(reload_->widget(), GDK_r, GDK_CONTROL_MASK);
   AddAcceleratorToButton(reload_->widget(), GDK_F5, GdkModifierType(0));
   AddAcceleratorToButton(reload_->widget(), GDK_F5, GDK_CONTROL_MASK);
+  AddAcceleratorToButton(reload_->widget(), XF86XK_Reload, GdkModifierType(0));
+  AddAcceleratorToButton(reload_->widget(), XF86XK_Refresh, GdkModifierType(0));
 
   home_.reset(BuildToolbarButton(IDR_HOME, IDR_HOME_P, IDR_HOME_H, 0,
                                  l10n_util::GetStringUTF8(IDS_TOOLTIP_HOME)));