[Extensions] Convert APIs to use movable types [13]

extensions/browser/api/system_storage/storage_info_provider.h

 // 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.
 
 #ifndef EXTENSIONS_BROWSER_API_SYSTEM_STORAGE_STORAGE_INFO_PROVIDER_H_
 #define EXTENSIONS_BROWSER_API_SYSTEM_STORAGE_STORAGE_INFO_PROVIDER_H_
 
 #include <set>
 
 #include "base/lazy_instance.h"
@@ skipping 11 matching lines @@
 
 namespace systeminfo {
 
 // Build StorageUnitInfo struct from StorageInfo instance. The |unit|
 // parameter is the output value.
 void BuildStorageUnitInfo(const storage_monitor::StorageInfo& info,
                           api::system_storage::StorageUnitInfo* unit);
 
 }  // namespace systeminfo
 
-typedef std::vector<linked_ptr<api::system_storage::StorageUnitInfo>>
-    StorageUnitInfoList;
+typedef std::vector<api::system_storage::StorageUnitInfo> StorageUnitInfoList;
 
 class StorageInfoProvider : public SystemInfoProvider {
  public:
   typedef base::Callback<void(const std::string&, double)>
       GetStorageFreeSpaceCallback;
 
   // Get the single shared instance of StorageInfoProvider.
   static StorageInfoProvider* Get();
 
   // SystemInfoProvider implementations
   void PrepareQueryOnUIThread() override;
   void InitializeProvider(const base::Closure& do_query_info_callback) override;
 
   virtual double GetStorageFreeSpaceFromTransientIdOnFileThread(
       const std::string& transient_id);
 
-  const StorageUnitInfoList& storage_unit_info_list() const;
+  const StorageUnitInfoList& storage_unit_info_list() const { return info_; }
 
   static void InitializeForTesting(scoped_refptr<StorageInfoProvider> provider);
 
  protected:
   StorageInfoProvider();
 
   ~StorageInfoProvider() override;
 
   // Put all available storages' information into |info_|.
   void GetAllStoragesIntoInfoList();
@@ skipping 14 matching lines @@
   bool QueryInfo() override;
 
   static base::LazyInstance<scoped_refptr<StorageInfoProvider> > provider_;
 
   DISALLOW_COPY_AND_ASSIGN(StorageInfoProvider);
 };
 
 }  // namespace extensions
 
 #endif  // EXTENSIONS_BROWSER_API_SYSTEM_STORAGE_STORAGE_INFO_PROVIDER_H_