Ensure that the correct open gl context is made current before attempting to write to the open

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 481 matching lines @@
   RETURN_ON_HR_FAILURE(hr, "Failed to create D3D device query", false);
   // Ensure query_ API works (to avoid an infinite loop later in
   // CopyOutputSampleDataToPictureBuffer).
   hr = query_->Issue(D3DISSUE_END);
   RETURN_ON_HR_FAILURE(hr, "Failed to issue END test query", false);
 
   return true;
 }
 
 DXVAVideoDecodeAccelerator::DXVAVideoDecodeAccelerator(
-    media::VideoDecodeAccelerator::Client* client)
+    media::VideoDecodeAccelerator::Client* client,
+    const base::Callback<bool(void)>& make_context_current)
     : client_(client),
       egl_config_(NULL),
       state_(kUninitialized),
       pictures_requested_(false),
-      inputs_before_decode_(0) {
+      inputs_before_decode_(0),
+      make_context_current_(make_context_current) {
   memset(&input_stream_info_, 0, sizeof(input_stream_info_));
   memset(&output_stream_info_, 0, sizeof(output_stream_info_));
 }
 
 DXVAVideoDecodeAccelerator::~DXVAVideoDecodeAccelerator() {
   client_ = NULL;
 }
 
 bool DXVAVideoDecodeAccelerator::Initialize(media::VideoCodecProfile profile) {
   DCHECK(CalledOnValidThread());
@@ skipping 440 matching lines @@
       base::AsWeakPtr(this), surface_desc.Width, surface_desc.Height));
 
   pictures_requested_ = true;
   return true;
 }
 
 void DXVAVideoDecodeAccelerator::ProcessPendingSamples() {
   if (pending_output_samples_.empty())
     return;
 
+  if (!make_context_current_.Run()) {
+    StopOnError(media::VideoDecodeAccelerator::PLATFORM_FAILURE);
+    return;
+  }
+
   OutputBuffers::iterator index;
 
   for (index = output_picture_buffers_.begin();
        index != output_picture_buffers_.end() &&
        !pending_output_samples_.empty();
        ++index) {
     if (index->second->available()) {
       PendingSampleInfo sample_info = pending_output_samples_.front();
 
       RETURN_AND_NOTIFY_ON_FAILURE(
@@ skipping 71 matching lines @@
         GL_TEXTURE_2D);
   }
 }
 
 void DXVAVideoDecodeAccelerator::NotifyPictureReady(
     const media::Picture& picture) {
   // This task could execute after the decoder has been torn down.
   if (state_ != kUninitialized && client_)
     client_->PictureReady(picture);
 }