Add flag for zip archiver on files app.

chrome/browser/flag_descriptions.h

 // 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.
 
 #ifndef CHROME_BROWSER_FLAG_DESCRIPTIONS_H_
 #define CHROME_BROWSER_FLAG_DESCRIPTIONS_H_
 
 // Includes needed for macros allowing conditional compilation of some strings.
 #include "build/build_config.h"
 #include "build/buildflag.h"
@@ skipping 2460 matching lines @@
 
 // Description of the Android Wallpapers App flag.
 extern const char kEnableAndroidWallpapersAppDescription[];
 
 // Name of the touch support for screen magnifier flag.
 extern const char kEnableTouchSupportForScreenMagnifierName[];
 
 // Description of the touch support for screen magnifier flag.
 extern const char kEnableTouchSupportForScreenMagnifierDescription[];
 
+// Name of zip archiver on files app flag.
+extern const char kEnableZipArchiverOnFileManagerName[];
+
+// Description of zip archiver on files app flag.
+extern const char kEnableZipArchiverOnFileManagerDescription[];
+
 #endif  // defined(OS_CHROMEOS)
 
 #if defined(OS_ANDROID)
 
 // Name for the flag to choose a default category order for content suggestions,
 // e.g. on the New Tab page.
 extern const char kContentSuggestionsCategoryOrderName[];
 
 // Description for the flag to choose a default category order for content
 // suggestions, e.g. on the New Tab page.
@@ skipping 692 matching lines @@
 
 // Description of the about: flag enabling emoji, handwriting and voice input on
 // opt-in IME menu.
 extern const char kEnableEhvInputDescription[];
 
 #endif  // #if defined(OS_CHROMEOS)
 
 }  // namespace flag_descriptions
 
 #endif  // CHROME_BROWSER_FLAG_DESCRIPTIONS_H_