Avoiding creation of new string for component version.

components/component_updater/default_component_installer.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 "base/bind.h"
 #include "base/bind_helpers.h"
 #include "base/files/file_enumerator.h"
 #include "base/files/file_path.h"
 #include "base/files/file_util.h"
 #include "base/location.h"
@@ skipping 66 matching lines @@
     return false;
   if (!installer_traits_->VerifyInstallation(manifest, install_path))
     return false;
   return true;
 }
 
 bool DefaultComponentInstaller::Install(const base::DictionaryValue& manifest,
                                         const base::FilePath& unpack_path) {
   std::string manifest_version;
   manifest.GetStringASCII("version", &manifest_version);
-  base::Version version(manifest_version.c_str());
+  base::Version version(manifest_version);
   if (!version.IsValid())
     return false;
   if (current_version_.CompareTo(version) > 0)
     return false;
   base::FilePath install_path =
       installer_traits_->GetBaseDirectory().AppendASCII(version.GetString());
   if (base::PathExists(install_path)) {
     if (!base::DeleteFile(install_path, true))
       return false;
   }
@@ skipping 167 matching lines @@
   ComponentReady(manifest_copy.Pass());
 }
 
 void DefaultComponentInstaller::ComponentReady(
     scoped_ptr<base::DictionaryValue> manifest) {
   installer_traits_->ComponentReady(
       current_version_, GetInstallDirectory(), manifest.Pass());
 }
 
 }  // namespace component_updater