Add separate feature flag for VR CCT browsing.

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"
+#include "device/vr/features/features.h"
 #include "media/media_features.h"
 
 // This file declares strings used in chrome://flags. These messages are not
 // translated, because instead of end-users they target Chromium developers and
 // testers. See https://crbug.com/587272 and https://crbug.com/703134 for more
 // details.
 //
 // Comments are not necessary. The contents of the strings (which appear in the
 // UI) should be good enough documentation for what flags do and when they
 // apply. If they aren't, fix them.
@@ skipping 754 matching lines @@
 
 extern const char kWebrtcHwVP8EncodingName[];
 extern const char kWebrtcHwVP8EncodingDescription[];
 
 extern const char kWebrtcSrtpAesGcmName[];
 extern const char kWebrtcSrtpAesGcmDescription[];
 
 extern const char kWebrtcStunOriginName[];
 extern const char kWebrtcStunOriginDescription[];
 
+#if BUILDFLAG(ENABLE_VR)
 extern const char kWebvrExperimentalRenderingName[];
 extern const char kWebvrExperimentalRenderingDescription[];
+#endif  // ENABLE_VR
 
 extern const char kWebvrName[];
 extern const char kWebvrDescription[];
 
 extern const char kWifiCredentialSyncName[];
 extern const char kWifiCredentialSyncDescription[];
 
 extern const char kZeroCopyName[];
 extern const char kZeroCopyDescription[];
 
@@ skipping 129 matching lines @@
 
 extern const char kEnableOfflinePreviewsName[];
 extern const char kEnableOfflinePreviewsDescription[];
 
 extern const char kEnableOskOverscrollName[];
 extern const char kEnableOskOverscrollDescription[];
 
 extern const char kEnableSpecialLocaleName[];
 extern const char kEnableSpecialLocaleDescription[];
 
+#if BUILDFLAG(ENABLE_VR)
+
 extern const char kEnableVrShellName[];
 extern const char kEnableVrShellDescription[];
 
+extern const char kVrCustomTabBrowsingName[];
+extern const char kVrCustomTabBrowsingDescription[];
+
+#endif  // BUILDFLAG(ENABLE_VR)
+
 extern const char kEnableWebapk[];
 extern const char kEnableWebapkDescription[];
 
 extern const char kEnableWebNfcName[];
 extern const char kEnableWebNfcDescription[];
 
 extern const char kEnableWebPaymentsSingleAppUiSkipName[];
 extern const char kEnableWebPaymentsSingleAppUiSkipDescription[];
 
 extern const char kHerbPrototypeChoicesName[];
@@ skipping 504 matching lines @@
 #endif  // defined(TOOLKIT_VIEWS) || defined(OS_ANDROID)
 
 // ============================================================================
 // Don't just add flags to the end, put them in the right section in
 // alphabetical order. See top instructions for more.
 // ============================================================================
 
 }  // namespace flag_descriptions
 
 #endif  // CHROME_BROWSER_FLAG_DESCRIPTIONS_H_