Add possibility to define data callback to BitmapFetcher

chrome/browser/profiles/profile_avatar_downloader.cc

 // Copyright 2014 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/profiles/profile_avatar_downloader.h"
 
 #include "base/files/file_path.h"
 #include "chrome/browser/browser_process.h"
 #include "chrome/browser/profiles/profile.h"
 #include "chrome/browser/profiles/profile_avatar_icon_util.h"
@@ skipping 17 matching lines @@
   fetcher_.reset(new chrome::BitmapFetcher(url, this));
 }
 
 ProfileAvatarDownloader::~ProfileAvatarDownloader() {
 }
 
 void ProfileAvatarDownloader::Start() {
   // In unit tests, the browser process can return a NULL request context.
   net::URLRequestContextGetter* request_context =
       g_browser_process->system_request_context();
-  if (request_context)
-    fetcher_->Start(
+  if (request_context) {
+    fetcher_->Init(
         request_context,
         std::string(),
         net::URLRequest::CLEAR_REFERRER_ON_TRANSITION_FROM_SECURE_TO_INSECURE,
         net::LOAD_NORMAL);
+    fetcher_->Start();
+  }
 }
 
 // BitmapFetcherDelegate overrides.
 void ProfileAvatarDownloader::OnFetchComplete(const GURL& url,
                                               const SkBitmap* bitmap) {
   if (!bitmap || !cache_)
     return;
 
   // Decode the downloaded bitmap. Ownership of the image is taken by |cache_|.
   gfx::Image image = gfx::Image::CreateFrom1xBitmap(*bitmap);
   cache_->SaveAvatarImageAtPath(&image,
       profiles::GetDefaultAvatarIconFileNameAtIndex(icon_index_),
       profiles::GetPathOfHighResAvatarAtIndex(icon_index_),
       profile_path_);
 }