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

chrome/browser/plugins/plugin_finder.cc

 // Copyright (c) 2012 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/plugins/plugin_finder.h"
 
 #include "base/bind.h"
 #include "base/json/json_reader.h"
 #include "base/message_loop/message_loop.h"
 #include "base/metrics/histogram_macros.h"
@@ skipping 118 matching lines @@
       std::string version;
       success = version_dict->GetString("version", &version);
       DCHECK(success);
       std::string status_str;
       success = version_dict->GetString("status", &status_str);
       DCHECK(success);
       PluginMetadata::SecurityStatus status =
           PluginMetadata::SECURITY_STATUS_UP_TO_DATE;
       success = PluginMetadata::ParseSecurityStatus(status_str, &status);
       DCHECK(success);
-      plugin->AddVersion(base::Version(version), status);
+      plugin->AddVersion(Version(version), status);
     }
   }
 
   LoadMimeTypes(false, plugin_dict, plugin);
   LoadMimeTypes(true, plugin_dict, plugin);
   return plugin;
 }
 
 void RecordBuiltInPluginListError(PluginListError error_code) {
   UMA_HISTOGRAM_ENUMERATION("PluginFinder.BuiltInPluginList.ErrorCode",
@@ skipping 226 matching lines @@
     metadata->AddMatchingMimeType(plugin.mime_types[i].mime_type);
 
   DCHECK(metadata->MatchesPlugin(plugin));
   if (identifier_plugin_.find(identifier) != identifier_plugin_.end())
     identifier = GetLongIdentifier(plugin);
 
   DCHECK(identifier_plugin_.find(identifier) == identifier_plugin_.end());
   identifier_plugin_[identifier] = metadata;
   return metadata->Clone();
 }