Set the texture to cleared in VideoDecodeAccelerator::PictureReady.

content/common/gpu/media/video_decode_accelerator_impl.h

Index: content/common/gpu/media/video_decode_accelerator_impl.h
diff --git a/content/common/gpu/media/video_decode_accelerator_impl.h b/content/common/gpu/media/video_decode_accelerator_impl.h
index 8b3163ebd8f1d867440441fa3a23033b80183575..30abfa658e1ba42d7eb1cdf5d8c1a367b06207f8 100644
--- a/content/common/gpu/media/video_decode_accelerator_impl.h
+++ b/content/common/gpu/media/video_decode_accelerator_impl.h
@@ -19,7 +19,9 @@ class CONTENT_EXPORT VideoDecodeAcceleratorImpl
   // Returns true if VDA::Decode and VDA::Client callbacks can run on the IO
   // thread. Otherwise they will run on the GPU child thread. The purpose of
   // running Decode on the IO thread is to reduce decode latency. Note Decode
-  // should return as soon as possible and not block on the IO thread.
+  // should return as soon as possible and not block on the IO thread. Also,
+  // PictureReady should be run on the child thread if a picture is delivered
+  // the first time so it can be cleared.
   virtual bool CanDecodeOnIOThread();
 };