Adjust URLFetcher::Create API so that object is returned as scoped_ptr.

chrome/browser/chromeos/extensions/wallpaper_api.cc

 // Copyright 2013 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/chromeos/extensions/wallpaper_api.h"
 
 #include <string>
 #include <vector>
 
 #include "ash/desktop_background/desktop_background_controller.h"
@@ skipping 30 matching lines @@
 
 class WallpaperFetcher : public net::URLFetcherDelegate {
  public:
   WallpaperFetcher() {}
 
   ~WallpaperFetcher() override {}
 
   void FetchWallpaper(const GURL& url, FetchCallback callback) {
     CancelPreviousFetch();
     callback_ = callback;
-    url_fetcher_.reset(net::URLFetcher::Create(url,
-                                               net::URLFetcher::GET,
-                                               this));
+    url_fetcher_ = net::URLFetcher::Create(url, net::URLFetcher::GET, this);
     url_fetcher_->SetRequestContext(
         g_browser_process->system_request_context());
     url_fetcher_->SetLoadFlags(net::LOAD_DISABLE_CACHE);
     url_fetcher_->Start();
   }
 
  private:
   // URLFetcherDelegate overrides:
   void OnURLFetchComplete(const net::URLFetcher* source) override {
     DCHECK(url_fetcher_.get() == source);
@@ skipping 161 matching lines @@
     const std::string& response) {
   if (success) {
     params_->details.data.reset(
         new std::vector<char>(response.begin(), response.end()));
     StartDecode(*params_->details.data);
   } else {
     SetError(response);
     SendResponse(false);
   }
 }