Switch base::Value typemapping to be by value instead of by unique_ptr.

chrome/utility/extensions/extensions_handler.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/utility/extensions/extensions_handler.h"
 
 #include <utility>
 
 #include "base/command_line.h"
 #include "base/files/file_path.h"
@@ skipping 55 matching lines @@
         std::move(source), mime_type, get_attached_images);
     parser->Start(base::Bind(&MediaParserImpl::ParseMediaMetadataDone, callback,
                              base::Owned(parser)));
   }
 
   static void ParseMediaMetadataDone(
       const ParseMediaMetadataCallback& callback,
       metadata::MediaMetadataParser* /* parser */,
       const extensions::api::media_galleries::MediaMetadata& metadata,
       const std::vector<metadata::AttachedImage>& attached_images) {
-    callback.Run(true, metadata.ToValue(), attached_images);
+    callback.Run(true, *metadata.ToValue(), attached_images);
   }
 
   void CheckMediaFile(base::TimeDelta decode_time,
                       base::File file,
                       const CheckMediaFileCallback& callback) override {
 #if !defined(MEDIA_DISABLE_FFMPEG)
     media::MediaFileChecker checker(std::move(file));
     callback.Run(checker.Start(decode_time));
 #else
     callback.Run(false);
@@ skipping 186 matching lines @@
   picasa::PicasaAlbumsIndexer indexer(album_uids);
   indexer.ParseFolderINI(folders_inis);
   content::UtilityThread::Get()->Send(
       new ChromeUtilityHostMsg_IndexPicasaAlbumsContents_Finished(
           indexer.albums_images()));
   content::UtilityThread::Get()->ReleaseProcessIfNeeded();
 }
 #endif  // defined(OS_WIN) || defined(OS_MACOSX)
 
 }  // namespace extensions