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

chrome/browser/plugins/plugin_metadata_unittest.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_metadata.h"
 
 #include "base/strings/utf_string_conversions.h"
 #include "content/public/common/webplugininfo.h"
 #include "testing/gtest/include/gtest/gtest.h"
 
@@ skipping 23 matching lines @@
   PluginMetadata plugin_metadata("claybrick-writer",
                                  base::ASCIIToUTF16("ClayBrick Writer"),
                                  true,
                                  GURL(),
                                  GURL(),
                                  base::ASCIIToUTF16("ClayBrick"),
                                  std::string());
   EXPECT_EQ(kRequiresAuthorization,
             GetSecurityStatus(&plugin_metadata, "1.2.3"));
 
-  plugin_metadata.AddVersion(base::Version("9.4.1"), kRequiresAuthorization);
-  plugin_metadata.AddVersion(base::Version("10"), kOutOfDate);
-  plugin_metadata.AddVersion(base::Version("10.2.1"), kUpToDate);
+  plugin_metadata.AddVersion(Version("9.4.1"), kRequiresAuthorization);
+  plugin_metadata.AddVersion(Version("10"), kOutOfDate);
+  plugin_metadata.AddVersion(Version("10.2.1"), kUpToDate);
 
   // Invalid version.
   EXPECT_EQ(kOutOfDate, GetSecurityStatus(&plugin_metadata, "foo"));
 
   EXPECT_EQ(kOutOfDate, GetSecurityStatus(&plugin_metadata, "0"));
   EXPECT_EQ(kOutOfDate, GetSecurityStatus(&plugin_metadata, "1.2.3"));
   EXPECT_EQ(kRequiresAuthorization,
             GetSecurityStatus(&plugin_metadata, "9.4.1"));
   EXPECT_EQ(kRequiresAuthorization,
             GetSecurityStatus(&plugin_metadata, "9.4.2"));
   EXPECT_EQ(kOutOfDate, GetSecurityStatus(&plugin_metadata, "10.2.0"));
   EXPECT_EQ(kUpToDate, GetSecurityStatus(&plugin_metadata, "10.2.1"));
   EXPECT_EQ(kUpToDate, GetSecurityStatus(&plugin_metadata, "11"));
 }