Experiment to hide close buttons of inactive tabs when using touch

chrome/browser/ui/views/tabs/tab_strip.cc

 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "chrome/browser/ui/views/tabs/tab_strip.h"
 
 #if defined(OS_WIN)
 #include <windowsx.h>
 #endif
 
@@ skipping 949 matching lines @@
 
 const ui::ListSelectionModel& TabStrip::GetSelectionModel() {
   return controller_->GetSelectionModel();
 }
 
 bool TabStrip::SupportsMultipleSelection() {
   // TODO: currently only allow single selection in touch layout mode.
   return touch_layout_ == NULL;
 }
 
+bool TabStrip::TouchWasUsedAsLastInput() {
+  return stacked_layout_;
+}
+
 void TabStrip::SelectTab(Tab* tab) {
   int model_index = GetModelIndexOfTab(tab);
   if (IsValidModelIndex(model_index))
     controller_->SelectTab(model_index);
 }
 
 void TabStrip::ExtendSelectionTo(Tab* tab) {
   int model_index = GetModelIndexOfTab(tab);
   if (IsValidModelIndex(model_index))
     controller_->ExtendSelectionTo(model_index);
@@ skipping 1760 matching lines @@
           ConvertPointToViewAndGetEventHandler(this, newtab_button_, point);
       if (view)
         return view;
     }
     Tab* tab = FindTabForEvent(point);
     if (tab)
       return ConvertPointToViewAndGetEventHandler(this, tab, point);
   }
   return this;
 }