[Custom Tabs] Implement "Read It Later" Behind a Flag

chrome/browser/android/chrome_feature_list.cc

Index: chrome/browser/android/chrome_feature_list.cc
diff --git a/chrome/browser/android/chrome_feature_list.cc b/chrome/browser/android/chrome_feature_list.cc
index 1f19b85da1df694a6892a0d3e6ac613e592445ba..78f5fc280dec59a30a704783a44abc90c4e5b09f 100644
--- a/chrome/browser/android/chrome_feature_list.cc
+++ b/chrome/browser/android/chrome_feature_list.cc
@@ -37,6 +37,7 @@ const base::Feature* kFeaturesExposedToJava[] = {
     &kNTPSnippetsFeature,
     &kNTPToolbarFeature,
     &kPhysicalWebFeature,
+    &kReadItLaterInMenu,
     &kSystemDownloadManager,
     &offline_pages::kOfflinePagesBackgroundLoadingFeature,
 };
@@ -73,6 +74,10 @@ const base::Feature kPhysicalWebFeature {
   "PhysicalWeb", base::FEATURE_ENABLED_BY_DEFAULT
 };
 
+const base::Feature kReadItLaterInMenu {
+  "ReadItLaterInMenu", base::FEATURE_DISABLED_BY_DEFAULT
+};
+
 const base::Feature kSystemDownloadManager {
   "SystemDownloadManager", base::FEATURE_ENABLED_BY_DEFAULT
 };