Some linked_ptr -> unique_ptr conversion in extensions/browser.

extensions/browser/updater/extension_downloader.h

 // Copyright (c) 2012 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 EXTENSIONS_BROWSER_UPDATER_EXTENSION_DOWNLOADER_H_
 #define EXTENSIONS_BROWSER_UPDATER_EXTENSION_DOWNLOADER_H_
 
 #include <deque>
 #include <map>
 #include <memory>
 #include <set>
 #include <string>
 #include <utility>
 #include <vector>
 
 #include "base/compiler_specific.h"
 #include "base/macros.h"
-#include "base/memory/linked_ptr.h"
 #include "base/memory/weak_ptr.h"
 #include "base/version.h"
 #include "extensions/browser/updater/extension_downloader_delegate.h"
 #include "extensions/browser/updater/manifest_fetch_data.h"
 #include "extensions/browser/updater/request_queue.h"
 #include "extensions/common/extension.h"
 #include "extensions/common/update_manifest.h"
 #include "google_apis/gaia/oauth2_token_service.h"
 #include "net/url_request/url_fetcher_delegate.h"
 #include "url/gurl.h"
@@ skipping 250 matching lines @@
   // The request context to use for the URLFetchers.
   scoped_refptr<net::URLRequestContextGetter> request_context_;
 
   // Collects UMA samples that are reported when ReportStats() is called.
   URLStats url_stats_;
 
   // List of data on fetches we're going to do. We limit the number of
   // extensions grouped together in one batch to avoid running into the limits
   // on the length of http GET requests, so there might be multiple
   // ManifestFetchData* objects with the same base_url.
-  typedef std::map<std::pair<int, GURL>,
-                   std::vector<linked_ptr<ManifestFetchData>>> FetchMap;
+  using FetchMap = std::map<std::pair<int, GURL>,
+                            std::vector<std::unique_ptr<ManifestFetchData>>>;
   FetchMap fetches_preparing_;
 
   // Outstanding url fetch requests for manifests and updates.
   std::unique_ptr<net::URLFetcher> manifest_fetcher_;
   std::unique_ptr<net::URLFetcher> extension_fetcher_;
 
   // Pending manifests and extensions to be fetched when the appropriate fetcher
   // is available.
   RequestQueue<ManifestFetchData> manifests_queue_;
   RequestQueue<ExtensionFetch> extensions_queue_;
@@ skipping 27 matching lines @@
 
   // Used to create WeakPtrs to |this|.
   base::WeakPtrFactory<ExtensionDownloader> weak_ptr_factory_;
 
   DISALLOW_COPY_AND_ASSIGN(ExtensionDownloader);
 };
 
 }  // namespace extensions
 
 #endif  // EXTENSIONS_BROWSER_UPDATER_EXTENSION_DOWNLOADER_H_