Revert of base: Remove using:: declaration from version.h header.

chrome/common/service_process_util.cc

Index: chrome/common/service_process_util.cc
diff --git a/chrome/common/service_process_util.cc b/chrome/common/service_process_util.cc
index f26dd0aba45c90403eb7dcb9cd77ab30a6c6a469..9bb3464ca8865b58d6f523880e24bbab1de3d90f 100644
--- a/chrome/common/service_process_util.cc
+++ b/chrome/common/service_process_util.cc
@@ -71,13 +71,13 @@
   if (service_version_out)
     *service_version_out = version;
 
-  base::Version service_version(version);
+  Version service_version(version);
   // If the version string is invalid, treat it like an older version.
   if (!service_version.IsValid())
     return SERVICE_OLDER_VERSION_RUNNING;
 
   // Get the version of the currently *running* instance of Chrome.
-  base::Version running_version(version_info::GetVersionNumber());
+  Version running_version(version_info::GetVersionNumber());
   if (!running_version.IsValid()) {
     NOTREACHED() << "Failed to parse version info";
     // Our own version is invalid. This is an error case. Pretend that we