Probe whether MFPlat.dll is present on Windows systems.

content/common/gpu/media/dxva_video_decode_accelerator.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 "content/common/gpu/media/dxva_video_decode_accelerator.h"
 
 #if !defined(OS_WIN)
 #error This file should only be built on Windows.
 #endif   // !defined(OS_WIN)
 
@@ skipping 415 matching lines @@
   memset(&output_stream_info_, 0, sizeof(output_stream_info_));
 }
 
 DXVAVideoDecodeAccelerator::~DXVAVideoDecodeAccelerator() {
   client_ = NULL;
 }
 
 bool DXVAVideoDecodeAccelerator::Initialize(media::VideoCodecProfile profile) {
   DCHECK(CalledOnValidThread());
 
+  // Not all versions of Windows 7 and later include Media Foundation DLLs.
+  // Instead of crashing while delay loading the DLL when calling MFStartup()
+  // below, probe whether we can successfully load the DLL now.
+  //
+  // See http://crbug.com/339678 for details.
+  HMODULE mfplat_dll = ::LoadLibrary(L"MFPlat.dll");
+  RETURN_ON_FAILURE(mfplat_dll, "MFPlat.dll is required for decoding", false);
+
   // TODO(ananta)
   // H264PROFILE_HIGH video decoding is janky at times. Needs more
   // investigation.
   if (profile != media::H264PROFILE_BASELINE &&
       profile != media::H264PROFILE_MAIN &&
       profile != media::H264PROFILE_HIGH) {
     RETURN_AND_NOTIFY_ON_FAILURE(false,
         "Unsupported h264 profile", PLATFORM_FAILURE, false);
   }
 
@@ skipping 695 matching lines @@
 
   for (index = picture_buffers.begin();
        index != picture_buffers.end();
        ++index) {
     DVLOG(1) << "Dismissing picture id: " << index->second->id();
     client_->DismissPictureBuffer(index->second->id());
   }
 }
 
 }  // namespace content