Use IOSImageDataFetcherWrapper in BrowserViewController

components/image_fetcher/ios/ios_image_data_fetcher_wrapper.h

 // Copyright 2017 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_IMAGE_FETCHER_IOS_IOS_IMAGE_DATA_FETCHER_WRAPPER_H_
 #define COMPONENTS_IMAGE_FETCHER_IOS_IOS_IMAGE_DATA_FETCHER_WRAPPER_H_
 
 #import <Foundation/Foundation.h>
 
 #include "base/memory/ref_counted.h"
@@ skipping 18 matching lines @@
 class IOSImageDataFetcherWrapper {
  public:
   using DataUseServiceName = data_use_measurement::DataUseUserData::ServiceName;
 
   // The TaskRunner is used to decode the image if it is WebP-encoded.
   IOSImageDataFetcherWrapper(
       net::URLRequestContextGetter* url_request_context_getter,
       const scoped_refptr<base::TaskRunner>& task_runner);
   virtual ~IOSImageDataFetcherWrapper();
 
-  // Start downloading the image at the given |image_url|. The |callback| will
-  // be called with the downloaded image, or nil if any error happened or the
-  // http response header is not HTTP_OK (200). If the url is a data URL, the
-  // http response header is considered to be HTTP_OK.
-  // |callback| cannot be nil.
+  // Helper to start downloading and possibly decoding the image without a
+  // referrer.
   virtual void FetchImageDataWebpDecoded(const GURL& image_url,
                                          IOSImageDataFetcherCallback callback);
 
+  // Start downloading the image at the given |image_url|. The |callback| will
+  // be called with the downloaded image, or nil if any error happened. If the
+  // image is WebP it will be decoded.
+  // The |referrer| and |referrer_policy| will be passed on to the underlying
+  // URLFetcher.
+  // |callback| cannot be nil.
+  void FetchImageDataWebpDecoded(
+      const GURL& image_url,
+      IOSImageDataFetcherCallback callback,
+      const std::string& referrer,
+      net::URLRequest::ReferrerPolicy referrer_policy);
+
   // Sets a service name against which to track data usage.
   void SetDataUseServiceName(DataUseServiceName data_use_service_name);
 
  private:
+  ImageDataFetcher::ImageDataFetcherCallback CallbackForImageDataFetcher(
+      IOSImageDataFetcherCallback callback);
+
   // The task runner used to decode images if necessary.
   const scoped_refptr<base::TaskRunner> task_runner_;
   ImageDataFetcher image_data_fetcher_;
 
   DISALLOW_COPY_AND_ASSIGN(IOSImageDataFetcherWrapper);
 };
 
 }  // namespace image_fetcher
 
 #endif  // COMPONENTS_IMAGE_FETCHER_IOS_IOS_IMAGE_DATA_FETCHER_WRAPPER_H_