Hide close buttons of inactive stacked tabs by default

chrome/browser/ui/views/tabs/tab_controller.h

 // 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.
 
 #ifndef CHROME_BROWSER_UI_VIEWS_TABS_TAB_CONTROLLER_H_
 #define CHROME_BROWSER_UI_VIEWS_TABS_TAB_CONTROLLER_H_
 
 #include "chrome/browser/ui/views/tabs/tab_strip_types.h"
 
 class Tab;
@@ skipping 11 matching lines @@
 }
 
 // Controller for tabs.
 class TabController {
  public:
   virtual const ui::ListSelectionModel& GetSelectionModel() = 0;
 
   // Returns true if multiple selection is supported.
   virtual bool SupportsMultipleSelection() = 0;
 
-  // Returns true if we should force the close button of the inactive tab
-  // |tab| to be hidden.
-  virtual bool ShouldHideCloseButtonForInactiveTab(const Tab* tab) = 0;
+  // Returns true if we should force the close buttons of the inactive tabs
+  // to be hidden.
+  virtual bool ShouldHideCloseButtonForInactiveTabs() = 0;
 
   // Selects the tab.
   virtual void SelectTab(Tab* tab) = 0;
 
   // Extends the selection from the anchor to |tab|.
   virtual void ExtendSelectionTo(Tab* tab) = 0;
 
   // Toggles whether |tab| is selected.
   virtual void ToggleSelected(Tab* tab) = 0;
 
@@ skipping 53 matching lines @@
 
   // Adds private information to the tab's accessibility state.
   virtual void UpdateTabAccessibilityState(const Tab* tab,
                                         ui::AXViewState* state) = 0;
 
  protected:
   virtual ~TabController() {}
 };
 
 #endif  // CHROME_BROWSER_UI_VIEWS_TABS_TAB_CONTROLLER_H_