1 files changed, 11 insertions, 0 deletions
diff --git a/chrome/browser/tabs/tab_strip_model.cc b/chrome/browser/tabs/tab_strip_model.cc
index 58b15f5..e1a93f3 100644
--- a/chrome/browser/tabs/tab_strip_model.cc
+++ b/chrome/browser/tabs/tab_strip_model.cc
@@ -199,6 +199,17 @@ int TabStripModel::GetIndexOfTabContents(const TabContents* contents) const {
   return kNoTab;
 }
 
+int TabStripModel::GetIndexOfController(
+    const NavigationController* controller) const {
+  int index = 0;
+  TabContentsDataVector::const_iterator iter = contents_data_.begin();
+  for (; iter != contents_data_.end(); ++iter, ++index) {
+    if (&(*iter)->contents->controller() == controller)
+      return index;
+  }
+  return kNoTab;
+}
+
 void TabStripModel::UpdateTabContentsStateAt(int index, bool loading_only) {
   DCHECK(ContainsIndex(index));