Add about:flags entry for scroll anchoring.

chrome/browser/about_flags.cc

 // 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.
 
 #include "chrome/browser/about_flags.h"
 
 #include <iterator>
 #include <map>
 #include <set>
 #include <utility>
@@ skipping 1766 matching lines @@
     {"enable-webfonts-intervention-trigger",
       IDS_FLAGS_ENABLE_WEBFONTS_INTERVENTION_TRIGGER_NAME,
       IDS_FLAGS_ENABLE_WEBFONTS_INTERVENTION_TRIGGER_DESCRIPTION, kOsAll,
       SINGLE_VALUE_TYPE(switches::kEnableWebFontsInterventionTrigger)},
     {"enable-grouped-history", IDS_FLAGS_ENABLE_GROUPED_HISTORY_NAME,
      IDS_FLAGS_ENABLE_GROUPED_HISTORY_DESCRIPTION, kOsDesktop,
      SINGLE_VALUE_TYPE(switches::kHistoryEnableGroupByDomain)},
     {"enable-token-binding", IDS_FLAGS_ENABLE_TOKEN_BINDING_NAME,
      IDS_FLAGS_ENABLE_TOKEN_BINDING_DESCRIPTION, kOsAll,
      FEATURE_VALUE_TYPE(features::kTokenBinding)},
+    {"enable-scroll-anchoring", IDS_FLAGS_ENABLE_SCROLL_ANCHORING_NAME,
+     IDS_FLAGS_ENABLE_SCROLL_ANCHORING_DESCRIPTION, kOsAll,
+     FEATURE_VALUE_TYPE(features::kScrollAnchoring)},
     // NOTE: Adding new command-line switches requires adding corresponding
     // entries to enum "LoginCustomFlags" in histograms.xml. See note in
     // histograms.xml and don't forget to run AboutFlagsHistogramTest unit test.
 };
 
 class FlagsStateSingleton {
  public:
   FlagsStateSingleton()
       : flags_state_(kFeatureEntries, arraysize(kFeatureEntries)) {}
   ~FlagsStateSingleton() {}
@@ skipping 201 matching lines @@
 const base::HistogramBase::Sample kBadSwitchFormatHistogramId = 0;
 
 const FeatureEntry* GetFeatureEntries(size_t* count) {
   *count = arraysize(kFeatureEntries);
   return kFeatureEntries;
 }
 
 }  // namespace testing
 
 }  // namespace about_flags