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

extensions/browser/user_script_loader.cc

 // Copyright 2014 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 "extensions/browser/user_script_loader.h"
 
 #include <set>
 #include <string>
 
 #include "base/version.h"
@@ skipping 81 matching lines @@
         script->add_glob(value);
       } else if (GetDeclarationValue(line, kExcludeDeclaration, &value)) {
         base::ReplaceSubstringsAfterOffset(&value, 0, "\\", "\\\\");
         base::ReplaceSubstringsAfterOffset(&value, 0, "?", "\\?");
         script->add_exclude_glob(value);
       } else if (GetDeclarationValue(line, kNamespaceDeclaration, &value)) {
         script->set_name_space(value);
       } else if (GetDeclarationValue(line, kNameDeclaration, &value)) {
         script->set_name(value);
       } else if (GetDeclarationValue(line, kVersionDeclaration, &value)) {
-        base::Version version(value);
+        Version version(value);
         if (version.IsValid())
           script->set_version(version.GetString());
       } else if (GetDeclarationValue(line, kDescriptionDeclaration, &value)) {
         script->set_description(value);
       } else if (GetDeclarationValue(line, kMatchDeclaration, &value)) {
         URLPattern pattern(UserScript::ValidUserScriptSchemes());
         if (URLPattern::PARSE_SUCCESS != pattern.Parse(value))
           return false;
         script->add_url_pattern(pattern);
       } else if (GetDeclarationValue(line, kExcludeMatchDeclaration, &value)) {
@@ skipping 284 matching lines @@
   if (!shared_memory->ShareToProcess(handle, &handle_for_process))
     return;  // This can legitimately fail if the renderer asserts at startup.
 
   if (base::SharedMemory::IsHandleValid(handle_for_process)) {
     process->Send(new ExtensionMsg_UpdateUserScripts(
         handle_for_process, host_id(), changed_hosts, whitelisted_only));
   }
 }
 
 }  // namespace extensions