Improve large tab strip by leveraging touch icons when present

chrome/browser/ui/touch/tabs/touch_tab_strip.cc

Index: chrome/browser/ui/touch/tabs/touch_tab_strip.cc
diff --git a/chrome/browser/ui/touch/tabs/touch_tab_strip.cc b/chrome/browser/ui/touch/tabs/touch_tab_strip.cc
index f051baca43fba29f92754ae46075ac7d1a202933..46bfd716a9874ac9eb5fd02d041e2d4895f1c406 100644
--- a/chrome/browser/ui/touch/tabs/touch_tab_strip.cc
+++ b/chrome/browser/ui/touch/tabs/touch_tab_strip.cc
@@ -271,6 +271,11 @@ TouchTab* TouchTabStrip::GetTabAtTabDataIndex(int tab_data_index) const {
   return static_cast<TouchTab*>(base_tab_at_tab_index(tab_data_index));
 }
 
+// Retrieves the Tab at the specified *model* index.
+TouchTab* TouchTabStrip::GetTouchTabAtModelIndex(int model_index) const {
+  return static_cast<TouchTab*>(GetBaseTabAtModelIndex(model_index));
+}
+
 ////////////////////////////////////////////////////////////////////////////////
 // TouchTabStrip, private: