Preload the media foundation, h.264 decoder and the dxva2.dll before the gpu sandbox is initialized.

content/gpu/gpu_main.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 <stdlib.h>
 
 #if defined(OS_WIN)
 #include <dwmapi.h>
 #include <windows.h>
 #endif
@@ skipping 37 matching lines @@
 #include "ui/gl/gpu_switching_manager.h"
 
 #if defined(OS_ANDROID)
 #include "base/trace_event/memory_dump_manager.h"
 #include "components/tracing/graphics_memory_dump_provider_android.h"
 #endif
 
 #if defined(OS_WIN)
 #include "base/win/windows_version.h"
 #include "base/win/scoped_com_initializer.h"
+#include "content/common/gpu/media/dxva_video_decode_accelerator.h"
 #include "sandbox/win/src/sandbox.h"
 #endif
 
 #if defined(USE_X11)
 #include "ui/base/x/x11_util.h"
 #endif
 
 #if defined(OS_LINUX)
 #include "content/public/common/sandbox_init.h"
 #endif
@@ skipping 360 matching lines @@
   GetContentClient()->SetGpuInfo(gpu_info);
 }
 
 bool WarmUpSandbox(const base::CommandLine& command_line) {
   {
     TRACE_EVENT0("gpu", "Warm up rand");
     // Warm up the random subsystem, which needs to be done pre-sandbox on all
     // platforms.
     (void) base::RandUint64();
   }
+
+#if defined(OS_WIN)
+  content::DXVAVideoDecodeAccelerator::PreSandboxInitialization();
+#endif
   return true;
 }
 
 #if !defined(OS_MACOSX)
 bool CollectGraphicsInfo(gpu::GPUInfo& gpu_info) {
   TRACE_EVENT0("gpu,startup", "Collect Graphics Info");
 
   bool res = true;
   gpu::CollectInfoResult result = gpu::CollectContextGraphicsInfo(&gpu_info);
   switch (result) {
@@ skipping 116 matching lines @@
     return true;
   }
 
   return false;
 }
 #endif  // defined(OS_WIN)
 
 }  // namespace.
 
 }  // namespace content