Reland "Update mojo Decryptor interface to support reusing shared memory"

media/mojo/interfaces/decryptor.mojom

Index: media/mojo/interfaces/decryptor.mojom
diff --git a/media/mojo/interfaces/decryptor.mojom b/media/mojo/interfaces/decryptor.mojom
index d063e6b7a1a9aff87398b81f5828d6fac2223540..84f16ddfbd64caeb9796ba72845e05245c655667 100644
--- a/media/mojo/interfaces/decryptor.mojom
+++ b/media/mojo/interfaces/decryptor.mojom
@@ -51,10 +51,12 @@ interface Decryptor {
   // been successfully initialized.
   // At most one decrypt-and-decode call is allowed at any time for a
   // |stream_type|.
+  // For video, ReleaseSharedBuffer() must be called when the VideoFrame
+  // is shared memory based and the memory is no longer needed.
   DecryptAndDecodeAudio(DecoderBuffer encrypted)
       => (Status status, array<AudioBuffer>? audio_buffers);
-  DecryptAndDecodeVideo(
-      DecoderBuffer encrypted) => (Status status, VideoFrame? video_frame);
+  DecryptAndDecodeVideo(DecoderBuffer encrypted)
+      => (Status status, VideoFrame? video_frame);
 
   // Resets the decoder for |stream_type| to a clean initialized state and
   // cancels any pending decrypt-and-decode operations immediately with ERROR.
@@ -70,4 +72,7 @@ interface Decryptor {
   // After this operation, the decoder is set to an uninitialized state.
   // The decoder can be reinitialized after it is deinitialized.
   DeinitializeDecoder(DemuxerStream.Type stream_type);
+
+  // Releases the shared memory.
+  ReleaseSharedBuffer(handle<shared_buffer> buffer, uint64 buffer_size);
 };