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.h

 // 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.
 
 #ifndef CONTENT_COMMON_GPU_MEDIA_DXVA_VIDEO_DECODE_ACCELERATOR_H_
 #define CONTENT_COMMON_GPU_MEDIA_DXVA_VIDEO_DECODE_ACCELERATOR_H_
 
 #include <d3d9.h>
 #include <dxva2api.h>
 #include <list>
@@ skipping 22 matching lines @@
   enum State {
     kUninitialized,   // un-initialized.
     kNormal,          // normal playing state.
     kResetting,       // upon received Reset(), before ResetDone()
     kEosDrain,        // upon input EOS received.
     kStopped,         // upon output EOS received.
   };
 
   // Does not take ownership of |client| which must outlive |*this|.
   explicit DXVAVideoDecodeAccelerator(
-      media::VideoDecodeAccelerator::Client* client);
+      media::VideoDecodeAccelerator::Client* client,
+      const base::Callback<bool(void)>& make_context_current);
   virtual ~DXVAVideoDecodeAccelerator();
 
   // media::VideoDecodeAccelerator implementation.
   virtual bool Initialize(media::VideoCodecProfile profile) OVERRIDE;
   virtual void Decode(const media::BitstreamBuffer& bitstream_buffer) OVERRIDE;
   virtual void AssignPictureBuffers(
       const std::vector<media::PictureBuffer>& buffers) OVERRIDE;
   virtual void ReusePictureBuffer(int32 picture_buffer_id) OVERRIDE;
   virtual void Flush() OVERRIDE;
   virtual void Reset() OVERRIDE;
@@ skipping 139 matching lines @@
   // Counter which holds the number of input packets before a successful
   // decode.
   int inputs_before_decode_;
 
   // Set to true if all necessary initialization needed before the GPU process
   // is sandboxed is done.
   // This includes the following:
   // 1. All required decoder dlls were successfully loaded.
   // 2. The device manager initialization completed.
   static bool pre_sandbox_init_done_;
+
+  // Callback to set the correct gl context.
+  base::Callback<bool(void)> make_context_current_;
 };
 
 #endif  // CONTENT_COMMON_GPU_MEDIA_DXVA_VIDEO_DECODE_ACCELERATOR_H_