Move component updater artifacts into component_updater namespace.

chrome/browser/component_updater/test/test_installer.cc

 // 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.
 
 #include "chrome/browser/component_updater/test/test_installer.h"
 
 #include "base/file_util.h"
 #include "base/files/file_path.h"
 #include "base/values.h"
 
+namespace component_updater {
+
 TestInstaller::TestInstaller()
     : error_(0), install_count_(0) {
 }
 
 void TestInstaller::OnUpdateError(int error) {
   error_ = error;
 }
 
 bool TestInstaller::Install(const base::DictionaryValue& manifest,
                             const base::FilePath& unpack_path) {
@@ skipping 50 matching lines @@
   return true;
 }
 
 bool VersionedTestInstaller::GetInstalledFile(const std::string& file,
                                               base::FilePath* installed_file) {
   base::FilePath path;
   path = install_directory_.AppendASCII(current_version_.GetString());
   *installed_file = path.Append(base::FilePath::FromUTF8Unsafe(file));
   return true;
 }
+
+}  // namespace component_updater
+