Removing useless Win7 checks + standardize its use

media/gpu/dxva_video_decode_accelerator_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 "media/gpu/dxva_video_decode_accelerator_win.h"
 
 #include <memory>
 
 #if !defined(OS_WIN)
 #error This file should only be built on Windows.
@@ skipping 1236 matching lines @@
   return profiles;
 }
 
 // static
 void DXVAVideoDecodeAccelerator::PreSandboxInitialization() {
   g_catcher_tls_slot.Initialize(nullptr);
   for (const wchar_t* mfdll : kMediaFoundationVideoDecoderDLLs)
     ::LoadLibrary(mfdll);
   ::LoadLibrary(L"dxva2.dll");
 
-  if (base::win::GetVersion() > base::win::VERSION_WIN7) {
+  if (base::win::GetVersion() >= base::win::VERSION_WIN8) {
     LoadLibrary(L"msvproc.dll");
   } else {
 #if defined(ENABLE_DX11_FOR_WIN7)
     LoadLibrary(L"mshtmlmedia.dll");
 #endif
   }
 }
 
 // static
 std::pair<int, int> DXVAVideoDecodeAccelerator::GetMinResolution(
@@ skipping 1812 matching lines @@
       return false;
   }
   NOTREACHED();
   return false;
 }
 ID3D11Device* DXVAVideoDecodeAccelerator::D3D11Device() const {
   return ShouldUseANGLEDevice() ? angle_device_.Get() : d3d11_device_.Get();
 }
 
 }  // namespace media