[Android] Add AndroidSpellChecker feature to allow for gradual rollout using finch.

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 36 matching lines @@
 #include "components/ntp_snippets/features.h"
 #include "components/ntp_snippets/ntp_snippets_constants.h"
 #include "components/ntp_tiles/switches.h"
 #include "components/offline_pages/offline_page_feature.h"
 #include "components/omnibox/browser/omnibox_switches.h"
 #include "components/password_manager/core/common/password_manager_features.h"
 #include "components/proximity_auth/switches.h"
 #include "components/search/search_switches.h"
 #include "components/security_state/switches.h"
 #include "components/signin/core/common/signin_switches.h"
+#include "components/spellcheck/common/spellcheck_features.h"
 #include "components/spellcheck/common/spellcheck_switches.h"
 #include "components/ssl_config/ssl_config_switches.h"
 #include "components/sync/driver/sync_driver_switches.h"
 #include "components/tracing/common/tracing_switches.h"
 #include "components/translate/core/browser/translate_manager.h"
 #include "components/translate/core/browser/translate_prefs.h"
 #include "components/version_info/version_info.h"
 #include "content/public/browser/user_metrics.h"
 #include "content/public/common/content_features.h"
 #include "content/public/common/content_switches.h"
@@ skipping 782 matching lines @@
     {"enable-devtools-experiments", IDS_FLAGS_DEVTOOLS_EXPERIMENTS_NAME,
      IDS_FLAGS_DEVTOOLS_EXPERIMENTS_DESCRIPTION, kOsDesktop,
      SINGLE_VALUE_TYPE(switches::kEnableDevToolsExperiments)},
     {"silent-debugger-extension-api",
      IDS_FLAGS_SILENT_DEBUGGER_EXTENSION_API_NAME,
      IDS_FLAGS_SILENT_DEBUGGER_EXTENSION_API_DESCRIPTION, kOsDesktop,
      SINGLE_VALUE_TYPE(switches::kSilentDebuggerExtensionAPI)},
 #if defined(ENABLE_SPELLCHECK) && defined(OS_ANDROID)
     {"enable-android-spellchecker", IDS_OPTIONS_ENABLE_SPELLCHECK,
      IDS_OPTIONS_ENABLE_ANDROID_SPELLCHECKER_DESCRIPTION, kOsAndroid,
-     SINGLE_VALUE_TYPE(spellcheck::switches::kEnableAndroidSpellChecker)},
+     FEATURE_VALUE_TYPE(spellcheck::kAndroidSpellChecker)},
 #endif
     {"enable-scroll-prediction", IDS_FLAGS_SCROLL_PREDICTION_NAME,
      IDS_FLAGS_SCROLL_PREDICTION_DESCRIPTION, kOsDesktop,
      SINGLE_VALUE_TYPE(switches::kEnableScrollPrediction)},
     {"top-chrome-md", IDS_FLAGS_TOP_CHROME_MD,
      IDS_FLAGS_TOP_CHROME_MD_DESCRIPTION, kOsDesktop,
      MULTI_VALUE_TYPE(kTopChromeMaterialDesignChoices)},
     {"secondary-ui-md", IDS_FLAGS_SECONDARY_UI_MD,
      IDS_FLAGS_SECONDARY_UI_MD_DESCRIPTION, kOsDesktop,
      SINGLE_VALUE_TYPE(switches::kExtendMdToSecondaryUi)},
@@ skipping 1395 matching lines @@
 const base::HistogramBase::Sample kBadSwitchFormatHistogramId = 0;
 
 const FeatureEntry* GetFeatureEntries(size_t* count) {
   *count = arraysize(kFeatureEntries);
   return kFeatureEntries;
 }
 
 }  // namespace testing
 
 }  // namespace about_flags