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

chrome/android/java/src/org/chromium/chrome/browser/customtabs/CustomTabAppMenuPropertiesDelegate.java

Index: chrome/android/java/src/org/chromium/chrome/browser/customtabs/CustomTabAppMenuPropertiesDelegate.java
diff --git a/chrome/android/java/src/org/chromium/chrome/browser/customtabs/CustomTabAppMenuPropertiesDelegate.java b/chrome/android/java/src/org/chromium/chrome/browser/customtabs/CustomTabAppMenuPropertiesDelegate.java
index 0948e20af680badaed2e89eece1d073fa412ac78..b4751144b52902aa0915b7ec7b29684f6b53f72a 100644
--- a/chrome/android/java/src/org/chromium/chrome/browser/customtabs/CustomTabAppMenuPropertiesDelegate.java
+++ b/chrome/android/java/src/org/chromium/chrome/browser/customtabs/CustomTabAppMenuPropertiesDelegate.java
@@ -16,6 +16,7 @@ import org.chromium.base.BuildInfo;
 import org.chromium.base.VisibleForTesting;
 import org.chromium.chrome.R;
 import org.chromium.chrome.browser.ChromeActivity;
+import org.chromium.chrome.browser.ChromeFeatureList;
 import org.chromium.chrome.browser.appmenu.AppMenuPropertiesDelegate;
 import org.chromium.chrome.browser.share.ShareHelper;
 import org.chromium.chrome.browser.tab.Tab;
@@ -104,11 +105,18 @@ public class CustomTabAppMenuPropertiesDelegate extends AppMenuPropertiesDelegat
             }
 
             MenuItem openInChromeItem = menu.findItem(R.id.open_in_browser_id);
-            try {
-                openInChromeItem.setTitle(mDefaultBrowserFetcher.get());
-            } catch (InterruptedException | ExecutionException e) {
-                openInChromeItem.setTitle(
-                        mActivity.getString(R.string.menu_open_in_product_default));
+            MenuItem readItLaterItem = menu.findItem(R.id.read_it_later_id);
+            if (ChromeFeatureList.isEnabled("ReadItLaterInMenu")) {
+                // In the read-it-later experiment, Chrome will be the only browser to open the link
+                openInChromeItem.setTitle(R.string.menu_open_in_chrome);
+            } else {
+                readItLaterItem.setVisible(false);
+                try {
+                    openInChromeItem.setTitle(mDefaultBrowserFetcher.get());
+                } catch (InterruptedException | ExecutionException e) {
+                    openInChromeItem.setTitle(
+                            mActivity.getString(R.string.menu_open_in_product_default));
+                }
             }
 
             // Add custom menu items. Make sure they are only added once.