Make ComponentInstaller refcounted.

components/update_client/component_unpacker.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 "components/update_client/component_unpacker.h"
 
 #include <stdint.h>
 #include <string>
 #include <vector>
 
@@ skipping 84 matching lines @@
   bool is_delta_;
   std::vector<uint8_t> public_key_;
 };
 
 }  // namespace
 
 ComponentUnpacker::ComponentUnpacker(
     const std::vector<uint8_t>& pk_hash,
     const base::FilePath& path,
     const std::string& fingerprint,
-    ComponentInstaller* installer,
-    scoped_refptr<OutOfProcessPatcher> oop_patcher,
-    scoped_refptr<base::SequencedTaskRunner> task_runner)
+    const scoped_refptr<ComponentInstaller>& installer,
+    const scoped_refptr<OutOfProcessPatcher>& oop_patcher,
+    const scoped_refptr<base::SequencedTaskRunner>& task_runner)
     : pk_hash_(pk_hash),
       path_(path),
       is_delta_(false),
       fingerprint_(fingerprint),
       installer_(installer),
       oop_patcher_(oop_patcher),
       error_(kNone),
       extended_error_(0),
       task_runner_(task_runner) {
 }
@@ skipping 152 matching lines @@
     base::DeleteFile(unpack_diff_path_, true);
   if (!unpack_path_.empty())
     base::DeleteFile(unpack_path_, true);
   callback_.Run(error_, extended_error_);
 }
 
 ComponentUnpacker::~ComponentUnpacker() {
 }
 
 }  // namespace update_client