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

gpu/config/gpu_info_collector_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 "gpu/config/gpu_info_collector.h"
 
 // This has to be included before windows.h.
 #include "third_party/re2/re2/re2.h"
 
 #include <windows.h>
@@ skipping 35 matching lines @@
 // This must be kept in sync with histograms.xml.
 enum DisplayLinkInstallationStatus {
   DISPLAY_LINK_NOT_INSTALLED,
   DISPLAY_LINK_7_1_OR_EARLIER,
   DISPLAY_LINK_7_2_OR_LATER,
   DISPLAY_LINK_INSTALLATION_STATUS_MAX
 };
 
 // Returns the display link driver version or an invalid version if it is
 // not installed.
-base::Version DisplayLinkVersion() {
+Version DisplayLinkVersion() {
   base::win::RegKey key;
 
   if (key.Open(HKEY_LOCAL_MACHINE, L"SOFTWARE", KEY_READ | KEY_WOW64_64KEY))
-    return base::Version();
+    return Version();
 
   if (key.OpenKey(L"DisplayLink", KEY_READ | KEY_WOW64_64KEY))
-    return base::Version();
+    return Version();
 
   if (key.OpenKey(L"Core", KEY_READ | KEY_WOW64_64KEY))
-    return base::Version();
+    return Version();
 
   base::string16 version;
   if (key.ReadValue(L"Version", &version))
-    return base::Version();
+    return Version();
 
-  return base::Version(base::UTF16ToASCII(version));
+  return Version(base::UTF16ToASCII(version));
 }
 
 // Returns whether Lenovo dCute is installed.
 bool IsLenovoDCuteInstalled() {
   base::win::RegKey key;
 
   if (key.Open(HKEY_LOCAL_MACHINE, L"SOFTWARE", KEY_READ | KEY_WOW64_64KEY))
     return false;
 
   if (key.OpenKey(L"Lenovo", KEY_READ | KEY_WOW64_64KEY))
@@ skipping 410 matching lines @@
   }
 
   MergeGPUInfoGL(basic_gpu_info, context_gpu_info);
 
   basic_gpu_info->dx_diagnostics_info_state =
       context_gpu_info.dx_diagnostics_info_state;
   basic_gpu_info->dx_diagnostics = context_gpu_info.dx_diagnostics;
 }
 
 }  // namespace gpu