Add an about:flag to support alternative data saver features

components/data_reduction_proxy/content/browser/content_lofi_decider.cc

Index: components/data_reduction_proxy/content/browser/content_lofi_decider.cc
diff --git a/components/data_reduction_proxy/content/browser/content_lofi_decider.cc b/components/data_reduction_proxy/content/browser/content_lofi_decider.cc
index dc203b99319c979c4bf6ea15c64da066277bc8e5..ac9452408650d0d10faad044a1f504a280c32253 100644
--- a/components/data_reduction_proxy/content/browser/content_lofi_decider.cc
+++ b/components/data_reduction_proxy/content/browser/content_lofi_decider.cc
@@ -180,22 +180,6 @@ void ContentLoFiDecider::RemoveAcceptTransformHeader(
   headers->RemoveHeader(chrome_proxy_accept_transform_header());
 }
 
-void ContentLoFiDecider::MaybeSetIgnorePreviewsBlacklistDirective(
-    net::HttpRequestHeaders* headers) const {
-  if (!headers || !params::AreLitePagesEnabledViaFlags() ||
-      !IsLitePagePreviewRequested(*headers)) {
-    return;
-  }
-  std::string chrome_proxy_header_value;
-  headers->GetHeader(chrome_proxy_header(), &chrome_proxy_header_value);
-  headers->RemoveHeader(chrome_proxy_header());
-  if (!chrome_proxy_header_value.empty())
-    chrome_proxy_header_value += ", ";
-  chrome_proxy_header_value +=
-      chrome_proxy_lite_page_ignore_blacklist_directive();
-  headers->SetHeader(chrome_proxy_header(), chrome_proxy_header_value);
-}
-
 bool ContentLoFiDecider::ShouldRecordLoFiUMA(
     const net::URLRequest& request) const {
   const content::ResourceRequestInfo* request_info =