GTK: First draft of the unified cut/copy/paste and +/-/Fullscreen menu items.

chrome/browser/back_forward_menu_model.cc

Index: chrome/browser/back_forward_menu_model.cc
diff --git a/chrome/browser/back_forward_menu_model.cc b/chrome/browser/back_forward_menu_model.cc
index e1bc742c2c6f6bdb1c82f80c084da66f4d7dbc19..5a164e7842e6a2ad411228bda5758f733c161f2e 100644
--- a/chrome/browser/back_forward_menu_model.cc
+++ b/chrome/browser/back_forward_menu_model.cc
@@ -115,6 +115,11 @@ bool BackForwardMenuModel::GetIconAt(int index, SkBitmap* icon) const {
   return true;
 }
 
+menus::ButtonMenuItemModel* BackForwardMenuModel::GetButtonMenuItemAt(
+    int index) const {
+  return NULL;
+}
+
 bool BackForwardMenuModel::IsEnabledAt(int index) const {
   return index < GetItemCount() && !IsSeparator(index);
 }