Provide callback to create mojo AndroidOverlays to AVDA.

media/gpu/ipc/service/media_gpu_channel.h

Index: media/gpu/ipc/service/media_gpu_channel.h
diff --git a/media/gpu/ipc/service/media_gpu_channel.h b/media/gpu/ipc/service/media_gpu_channel.h
index 547b26af0428bde292db5950393fe42c656702a2..589df0e2e161b3232fdf3bb49b1a68281466ed15 100644
--- a/media/gpu/ipc/service/media_gpu_channel.h
+++ b/media/gpu/ipc/service/media_gpu_channel.h
@@ -10,6 +10,7 @@
 #include "base/unguessable_token.h"
 #include "ipc/ipc_listener.h"
 #include "ipc/ipc_sender.h"
+#include "media/base/android_overlay_mojo_factory.h"
 #include "media/gpu/ipc/service/gpu_jpeg_decode_accelerator.h"
 #include "media/video/video_decode_accelerator.h"
 
@@ -28,7 +29,8 @@ class MediaGpuChannelDispatchHelper;
 class MediaGpuChannel : public IPC::Listener, public IPC::Sender {
  public:
   MediaGpuChannel(gpu::GpuChannel* channel,
-                  const base::UnguessableToken& channel_token);
+                  const base::UnguessableToken& channel_token,
+                  const AndroidOverlayMojoFactoryCB& overlay_factory_cb);
   ~MediaGpuChannel() override;
 
   // IPC::Sender implementation:
@@ -53,6 +55,7 @@ class MediaGpuChannel : public IPC::Listener, public IPC::Sender {
   gpu::GpuChannel* const channel_;
   base::UnguessableToken channel_token_;
   std::unique_ptr<GpuJpegDecodeAccelerator> jpeg_decoder_;
+  AndroidOverlayMojoFactoryCB overlay_factory_cb_;
   DISALLOW_COPY_AND_ASSIGN(MediaGpuChannel);
 };