Add an about:flag to support alternative data saver features

components/data_reduction_proxy/core/common/lofi_decider.h

 // 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.
 
 #ifndef COMPONENTS_DATA_REDUCTION_PROXY_CORE_BROWSER_LOFI_DECIDER_H_
 #define COMPONENTS_DATA_REDUCTION_PROXY_CORE_BROWSER_LOFI_DECIDER_H_
 
 #include "base/macros.h"
 
 namespace net {
@@ skipping 36 matching lines @@
   // Returns true if |headers| contains the Chrome-Proxy-Accept-Transform
   // header with the "lite-page" directive.
   virtual bool IsLitePagePreviewRequested(
       const net::HttpRequestHeaders& headers) const = 0;
 
   // Unconditionally removes the Chrome-Proxy-Accept-Transform header from
   // |headers.|
   virtual void RemoveAcceptTransformHeader(
       net::HttpRequestHeaders* headers) const = 0;
 
-  // Adds a directive to tell the server to ignore blacklists when a Lite Page
-  // preview is being requested due to command line flags being set.
-  virtual void MaybeSetIgnorePreviewsBlacklistDirective(
-      net::HttpRequestHeaders* headers) const = 0;
-
   // Returns true if the Lo-Fi specific UMA should be recorded. It is set to
   // true if Lo-Fi is enabled for |request|, Chrome session is in Lo-Fi
   // Enabled or Control field trial, and the network quality was slow.
   virtual bool ShouldRecordLoFiUMA(const net::URLRequest& request) const = 0;
 
   // Returns whether the request was a client-side Lo-Fi image request.
   virtual bool IsClientLoFiImageRequest(
       const net::URLRequest& request) const = 0;
 
   // Returns true if the request is for a client-side Lo-Fi image that is being
   // automatically reloaded because of a decoding error.
   virtual bool IsClientLoFiAutoReloadRequest(
       const net::URLRequest& request) const = 0;
 };
 
 }  // namespace data_reduction_proxy
 
 #endif  // COMPONENTS_DATA_REDUCTION_PROXY_CORE_BROWSER_LOFI_DECIDER_H_