Add about:flags entries for UseGoogleLocalNtp and OneGoogleBarOnLocalNtp

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 3404 matching lines @@
 extern const char kCaptureThumbnailOnLoadFinishedDescription[];
 
 #if defined(OS_WIN)
 
 // Name and description of the flag that enables D3D v-sync.
 extern const char kEnableD3DVsync[];
 extern const char kEnableD3DVsyncDescription[];
 
 #endif  // defined(OS_WIN)
 
+#if !defined(OS_ANDROID) && !defined(OS_IOS)
+
+// Name and description for the flag to use the local NTP if Google is the
+// default search engine.
+extern const char kUseGoogleLocalNtpName[];
+extern const char kUseGoogleLocalNtpDescription[];
+
+// Name and description for the flag to show a OneGoogleBar on the local NTP.
+extern const char kOneGoogleBarOnLocalNtpName[];
+extern const char kOneGoogleBarOnLocalNtpDescription[];
+
+#endif
+
 }  // namespace flag_descriptions
 
 #endif  // CHROME_BROWSER_FLAG_DESCRIPTIONS_H_