Revert of Removing "All Bookmarks"

ios/chrome/browser/about_flags.mm

Index: ios/chrome/browser/about_flags.mm
diff --git a/ios/chrome/browser/about_flags.mm b/ios/chrome/browser/about_flags.mm
index ca7030b6d711b17a06e9d5420d108d867e44daa0..42b945f1260bb30e98c79fc2031ce7583094cca7 100644
--- a/ios/chrome/browser/about_flags.mm
+++ b/ios/chrome/browser/about_flags.mm
@@ -122,6 +122,15 @@
     command_line->AppendSwitch(switches::kDisableLRUSnapshotCache);
   }
 
+  // Populate command line flag for the AllBookmarks from the
+  // configuration plist.
+  NSString* enableAllBookmarks = [defaults stringForKey:@"AllBookmarks"];
+  if ([enableAllBookmarks isEqualToString:@"Enabled"]) {
+    command_line->AppendSwitch(switches::kEnableAllBookmarksView);
+  } else if ([enableAllBookmarks isEqualToString:@"Disabled"]) {
+    command_line->AppendSwitch(switches::kDisableAllBookmarksView);
+  }
+
   // Populate command line flags from PasswordGenerationEnabled.
   NSString* enablePasswordGenerationValue =
       [defaults stringForKey:@"PasswordGenerationEnabled"];