Avoiding creation of new string for component version.

components/component_updater/default_component_installer.cc

Index: components/component_updater/default_component_installer.cc
diff --git a/components/component_updater/default_component_installer.cc b/components/component_updater/default_component_installer.cc
index e4eb99cba721b76e840e46f6437c4bc5ac05da16..b757c0d49b48b77438d82dd10546b3ca970a40d4 100644
--- a/components/component_updater/default_component_installer.cc
+++ b/components/component_updater/default_component_installer.cc
@@ -84,7 +84,7 @@ 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)