Add possibility to define data callback to BitmapFetcher

chrome/browser/ui/passwords/account_avatar_fetcher.cc

 // 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.
 
 #include "chrome/browser/ui/passwords/account_avatar_fetcher.h"
 
 #include "net/base/load_flags.h"
 #include "ui/gfx/image/image.h"
 #include "ui/gfx/image/image_skia.h"
 #include "ui/gfx/image/image_skia_operations.h"
 
 AccountAvatarFetcher::AccountAvatarFetcher(
     const GURL& url,
     const base::WeakPtr<AccountAvatarFetcherDelegate>& delegate)
     : fetcher_(url, this), delegate_(delegate) {
 }
 
 AccountAvatarFetcher::~AccountAvatarFetcher() = default;
 
 void AccountAvatarFetcher::Start(
     net::URLRequestContextGetter* request_context) {
-  fetcher_.Start(request_context, std::string(),
-                 net::URLRequest::NEVER_CLEAR_REFERRER,
-                 net::LOAD_DO_NOT_SEND_COOKIES | net::LOAD_DO_NOT_SAVE_COOKIES |
-                     net::LOAD_MAYBE_USER_GESTURE);
+  fetcher_.Init(request_context, std::string(),
+                net::URLRequest::NEVER_CLEAR_REFERRER,
+                net::LOAD_DO_NOT_SEND_COOKIES | net::LOAD_DO_NOT_SAVE_COOKIES |
+                    net::LOAD_MAYBE_USER_GESTURE);
+  fetcher_.Start();
 }
 
 void AccountAvatarFetcher::OnFetchComplete(const GURL& /*url*/,
                                            const SkBitmap* bitmap) {
   if (bitmap && delegate_)
     delegate_->UpdateAvatar(gfx::ImageSkia::CreateFrom1xBitmap(*bitmap));
 
   delete this;
 }