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

content/child/npapi/webplugin_delegate_impl_win.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 "content/child/npapi/webplugin_delegate_impl.h"
 
 #include <map>
 #include <set>
 #include <string>
 #include <vector>
@@ skipping 169 matching lines @@
   result = func(key, KeyNameInformation, buffer.get(), size, &size);
   if (result != STATUS_SUCCESS)
     return L"";
 
   KEY_NAME_INFORMATION* info =
       reinterpret_cast<KEY_NAME_INFORMATION*>(buffer.get());
   return std::wstring(info->Name, info->NameLength / sizeof(wchar_t));
 }
 
 uint32_t GetPluginMajorVersion(const WebPluginInfo& plugin_info) {
-  base::Version plugin_version;
+  Version plugin_version;
   WebPluginInfo::CreateVersionFromString(plugin_info.version, &plugin_version);
 
   uint32_t major_version = 0;
   if (plugin_version.IsValid())
     major_version = plugin_version.components()[0];
 
   return major_version;
 }
 
 }  // namespace
@@ skipping 1282 matching lines @@
     case WM_RBUTTONUP:
       ::ReleaseCapture();
       break;
 
     default:
       break;
   }
 }
 
 }  // namespace content