Revert "Update all users of base::Version to explicitly specify the namespace, and clean up the hea…

chrome/installer/util/google_update_settings.cc

Index: chrome/installer/util/google_update_settings.cc
diff --git a/chrome/installer/util/google_update_settings.cc b/chrome/installer/util/google_update_settings.cc
index 8160989122b6136476a0ac2e9643426b42239453..8d4fbd7f9b94d22e2ff5aba6cdb0655864aeb16a 100644
--- a/chrome/installer/util/google_update_settings.cc
+++ b/chrome/installer/util/google_update_settings.cc
@@ -585,8 +585,7 @@ base::string16 GoogleUpdateSettings::GetUninstallCommandLine(
   return cmd_line;
 }
 
-base::Version GoogleUpdateSettings::GetGoogleUpdateVersion(
-    bool system_install) {
+Version GoogleUpdateSettings::GetGoogleUpdateVersion(bool system_install) {
   const HKEY root_key = system_install ? HKEY_LOCAL_MACHINE : HKEY_CURRENT_USER;
   base::string16 version;
   RegKey key;
@@ -596,10 +595,10 @@ base::Version GoogleUpdateSettings::GetGoogleUpdateVersion(
                KEY_QUERY_VALUE) == ERROR_SUCCESS &&
       key.ReadValue(google_update::kRegGoogleUpdateVersion,
                     &version) == ERROR_SUCCESS) {
-    return base::Version(base::UTF16ToUTF8(version));
+    return Version(base::UTF16ToUTF8(version));
   }
 
-  return base::Version();
+  return Version();
 }
 
 base::Time GoogleUpdateSettings::GetGoogleUpdateLastStartedAU(