Moving the validation of bitstream_buffer into VDA implementations.

content/common/gpu/media/android_video_decode_accelerator.h

Index: content/common/gpu/media/android_video_decode_accelerator.h
diff --git a/content/common/gpu/media/android_video_decode_accelerator.h b/content/common/gpu/media/android_video_decode_accelerator.h
index e70c09ee0dd354692b7a7257b28dae76690b8f8c..a98fb9cf15e0b01ab9fe59c2b8e0f168708dfec0 100644
--- a/content/common/gpu/media/android_video_decode_accelerator.h
+++ b/content/common/gpu/media/android_video_decode_accelerator.h
@@ -166,6 +166,10 @@ class CONTENT_EXPORT AndroidVideoDecodeAccelerator
   // Requests picture buffers from the client.
   void RequestPictureBuffers();
 
+  // Internal version of Decode(), which allows -1 as the id of the
+  // |bitstream_buffer| to indicate the trigger of flush command.
+  void DecodeInternal(const media::BitstreamBuffer& bitstream_buffer);
+
   // This callback is called after CDM obtained a MediaCrypto object.
   void OnMediaCryptoReady(media::MediaDrmBridge::JavaObjectPtr media_crypto,
                           bool needs_protected_surface);