Example MojoVideoDecoder decoder using the command buffer.

media/gpu/ipc/service/media_gpu_channel_manager.h

Index: media/gpu/ipc/service/media_gpu_channel_manager.h
diff --git a/media/gpu/ipc/service/media_gpu_channel_manager.h b/media/gpu/ipc/service/media_gpu_channel_manager.h
index 718b8b8f33395fa48d06428a948901d244ce0548..f38e6d448c022f85e6de7eae985dbd6185910993 100644
--- a/media/gpu/ipc/service/media_gpu_channel_manager.h
+++ b/media/gpu/ipc/service/media_gpu_channel_manager.h
@@ -11,6 +11,8 @@
 
 #include "base/containers/scoped_ptr_hash_map.h"
 #include "base/macros.h"
+#include "base/memory/weak_ptr.h"
+#include "base/unguessable_token.h"
 #include "ipc/ipc_listener.h"
 #include "ipc/ipc_sender.h"
 #include "media/video/video_decode_accelerator.h"
@@ -24,7 +26,8 @@ namespace media {
 
 class MediaGpuChannel;
 
-class MediaGpuChannelManager {
+class MediaGpuChannelManager
+    : public base::SupportsWeakPtr<MediaGpuChannelManager> {
  public:
   explicit MediaGpuChannelManager(gpu::GpuChannelManager* channel_manager);
   ~MediaGpuChannelManager();
@@ -33,10 +36,15 @@ class MediaGpuChannelManager {
   void RemoveChannel(int32_t client_id);
   void DestroyAllChannels();
 
+  // TODO(sandersd): Should we expose the MediaGpuChannel instead?
+  gpu::GpuChannel* LookupChannel(base::UnguessableToken channel_token);
+
  private:
   gpu::GpuChannelManager* const channel_manager_;
   base::ScopedPtrHashMap<int32_t, std::unique_ptr<MediaGpuChannel>>
       media_gpu_channels_;
+  std::map<base::UnguessableToken, int32_t> token_to_channel_;
+  std::map<int32_t, base::UnguessableToken> channel_to_token_;
   DISALLOW_COPY_AND_ASSIGN(MediaGpuChannelManager);
 };