Provide callback to create mojo AndroidOverlays to AVDA.

media/gpu/ipc/service/gpu_video_decode_accelerator.h

Index: media/gpu/ipc/service/gpu_video_decode_accelerator.h
diff --git a/media/gpu/ipc/service/gpu_video_decode_accelerator.h b/media/gpu/ipc/service/gpu_video_decode_accelerator.h
index 6c6d0bff669394dfcb204194f60bed81127ebc0e..7165477b5ec7b855256da1b49168c217fc0829bf 100644
--- a/media/gpu/ipc/service/gpu_video_decode_accelerator.h
+++ b/media/gpu/ipc/service/gpu_video_decode_accelerator.h
@@ -21,6 +21,7 @@
 #include "gpu/ipc/service/gpu_command_buffer_stub.h"
 #include "ipc/ipc_listener.h"
 #include "ipc/ipc_sender.h"
+#include "media/base/android_overlay_mojo_factory.h"
 #include "media/gpu/gpu_video_decode_accelerator_helpers.h"
 #include "media/video/video_decode_accelerator.h"
 #include "ui/gfx/geometry/size.h"
@@ -44,7 +45,8 @@ class GpuVideoDecodeAccelerator
   GpuVideoDecodeAccelerator(
       int32_t host_route_id,
       gpu::GpuCommandBufferStub* stub,
-      const scoped_refptr<base::SingleThreadTaskRunner>& io_task_runner);
+      const scoped_refptr<base::SingleThreadTaskRunner>& io_task_runner,
+      const AndroidOverlayMojoFactoryCB& factory);
 
   // Static query for the capabilities, which includes the supported profiles.
   // This query calls the appropriate platform-specific version.  The returned
@@ -151,6 +153,9 @@ class GpuVideoDecodeAccelerator
   // GPU IO thread task runner.
   const scoped_refptr<base::SingleThreadTaskRunner> io_task_runner_;
 
+  // Optional factory for mojo-based android overlays.
+  AndroidOverlayMojoFactoryCB overlay_factory_cb_;
+
   // Weak pointers will be invalidated on IO thread.
   base::WeakPtrFactory<Client> weak_factory_for_io_;