🏠 Add expand button and flag to enable it

chrome/browser/android/chrome_feature_list.cc

 // Copyright 2015 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/android/chrome_feature_list.h"
 
 #include <stddef.h>
 
 #include <string>
 
@@ skipping 34 matching lines @@
     &features::kSimplifiedFullscreenUI,
     &features::kVrShell,
     &features::kWebPayments,
     &kAndroidPayIntegrationV1,
     &kAndroidPayIntegrationV2,
     &kAndroidPaymentApps,
     &kCCTBackgroundTab,
     &kCCTExternalLinkHandling,
     &kCCTPostMessageAPI,
     &kChromeHomeFeature,
+    &kChromeHomeExpandButton,
     &kContentSuggestionsSettings,
     &kContextualSearchSingleActions,
     &kContextualSearchUrlActions,
     &kCustomContextMenu,
     &kCustomFeedbackUi,
     &data_reduction_proxy::features::kDataReductionMainMenu,
     &data_reduction_proxy::features::kDataReductionSiteBreakdown,
     &kFullscreenActivity,
     &kImportantSitesInCBD,
     &kImprovedA2HS,
@@ skipping 52 matching lines @@
 
 const base::Feature kCCTExternalLinkHandling{"CCTExternalLinkHandling",
                                              base::FEATURE_ENABLED_BY_DEFAULT};
 
 const base::Feature kCCTPostMessageAPI{"CCTPostMessageAPI",
                                        base::FEATURE_ENABLED_BY_DEFAULT};
 
 const base::Feature kChromeHomeFeature{"ChromeHome",
                                        base::FEATURE_DISABLED_BY_DEFAULT};
 
+const base::Feature kChromeHomeExpandButton{"ChromeHomeExpandButton",
+                                            base::FEATURE_DISABLED_BY_DEFAULT};
+
 const base::Feature kContentSuggestionsSettings{
     "ContentSuggestionsSettings", base::FEATURE_DISABLED_BY_DEFAULT};
 
 const base::Feature kContextualSearchSingleActions{
     "ContextualSearchSingleActions", base::FEATURE_ENABLED_BY_DEFAULT};
 
 const base::Feature kContextualSearchUrlActions{
     "ContextualSearchUrlActions", base::FEATURE_DISABLED_BY_DEFAULT};
 
 const base::Feature kCustomContextMenu{"CustomContextMenu",
@@ skipping 141 matching lines @@
   return base::GetFieldTrialParamByFeatureAsBool(*feature, param_name,
                                                  jdefault_value);
 }
 
 bool RegisterChromeFeatureListJni(JNIEnv* env) {
   return RegisterNativesImpl(env);
 }
 
 }  // namespace android
 }  // namespace chrome