Remove the flag --disable-hide-inactive-stacked-tab-close-buttons

chrome/browser/flag_descriptions.cc

 // Copyright 2017 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/flag_descriptions.h"
 
 namespace flag_descriptions {
 
 const char kBrowserSideNavigationName[] = "Enable browser side navigation";
 
@@ skipping 1220 matching lines @@
 
 const char kDistanceFieldTextDescription[] =
     "Text is rendered with signed distance fields rather than bitmap alpha "
     "masks.";
 
 const char kZeroCopyName[] = "Zero-copy rasterizer";
 
 const char kZeroCopyDescription[] =
     "Raster threads write directly to GPU memory associated with tiles.";
 
-const char kHideInactiveStackedTabCloseButtonsName[] =
-    "Hiding close buttons on inactive tabs when stacked";
-
-const char kHideInactiveStackedTabCloseButtonsDescription[] =
-    "Hides the close buttons of inactive tabs when the tabstrip is in "
-    "stacked mode.";
-
 const char kDefaultTileWidthName[] = "Default tile width";
 
 const char kDefaultTileWidthDescription[] = "Specify the default tile width.";
 
 const char kDefaultTileWidthShort[] = "128";
 
 const char kDefaultTileWidthTall[] = "256";
 
 const char kDefaultTileWidthGrande[] = "512";
 
@@ skipping 1982 matching lines @@
     "in non-sticky mode (do not change work area in non-sticky mode).";
 
 const char kUiDevToolsName[] = "Enable native UI inspection";
 const char kUiDevToolsDescription[] =
     "Enables inspection of native UI elements. For local inspection use "
     "chrome://inspect#other";
 
 #endif  // defined(OS_CHROMEOS)
 
 }  // namespace flag_descriptions