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

gpu/config/gpu_info.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.h"
 
 namespace {
 
 void EnumerateGPUDevice(const gpu::GPUInfo::GPUDevice& device,
                         gpu::GPUInfo::Enumerator* enumerator) {
@@ skipping 64 matching lines @@
 }
 
 GPUInfo::~GPUInfo() { }
 
 void GPUInfo::EnumerateFields(Enumerator* enumerator) const {
   struct GPUInfoKnownFields {
     base::TimeDelta initialization_time;
     bool optimus;
     bool amd_switchable;
     bool lenovo_dcute;
-    base::Version display_link_version;
+    Version display_link_version;
     GPUDevice gpu;
     std::vector<GPUDevice> secondary_gpus;
     uint64 adapter_luid;
     std::string driver_vendor;
     std::string driver_version;
     std::string driver_date;
     std::string pixel_shader_version;
     std::string vertex_shader_version;
     std::string max_msaa_samples;
     std::string machine_model_name;
@@ skipping 82 matching lines @@
   for (const auto& profile : video_decode_accelerator_supported_profiles)
     EnumerateVideoDecodeAcceleratorSupportedProfile(profile, enumerator);
   for (const auto& profile : video_encode_accelerator_supported_profiles)
     EnumerateVideoEncodeAcceleratorSupportedProfile(profile, enumerator);
   enumerator->AddBool("jpegDecodeAcceleratorSupported",
       jpeg_decode_accelerator_supported);
   enumerator->EndAuxAttributes();
 }
 
 }  // namespace gpu