Use std::unique_ptr for base::DictionaryValue and base::ListValue's internal store.

components/update_client/component_patcher.h

 // 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.
 
 // Component updates can be either differential updates or full updates.
 // Full updates come in CRX format; differential updates come in CRX-style
 // archives, but have a different magic number. They contain "commands.json", a
 // list of commands for the patcher to follow. The patcher uses these commands,
 // the other files in the archive, and the files from the existing installation
 // of the component to create the contents of a full update, which is then
@@ skipping 73 matching lines @@
   void DonePatchingFile(ComponentUnpacker::Error error, int extended_error);
 
   void DonePatching(ComponentUnpacker::Error error, int extended_error);
 
   const base::FilePath input_dir_;
   const base::FilePath unpack_dir_;
   scoped_refptr<CrxInstaller> installer_;
   scoped_refptr<OutOfProcessPatcher> out_of_process_patcher_;
   ComponentUnpacker::Callback callback_;
   std::unique_ptr<base::ListValue> commands_;
-  base::ValueVector::const_iterator next_command_;
+  base::ListValue::const_iterator next_command_;
   scoped_refptr<DeltaUpdateOp> current_operation_;
   scoped_refptr<base::SequencedTaskRunner> task_runner_;
 
   DISALLOW_COPY_AND_ASSIGN(ComponentPatcher);
 };
 
 }  // namespace update_client
 
 #endif  // COMPONENTS_UPDATE_CLIENT_COMPONENT_PATCHER_H_