Add Mojo CDM Service.

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
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+// Copyright 2014 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+module mojo;
+
+import "media/mojo/interfaces/demuxer_stream.mojom";
+import "media/mojo/interfaces/media_types.mojom";
+
+// TODO(xhwang): Add mojo types for AudioBuffer and VideoFrame.
+struct AudioBuffer {};
+struct VideoFrame {};
+
+[Client=DecryptorClient]
+interface Decryptor {

[xhwang, 2014/12/02 22:22:45]

This is not implemented yet. I'll do that in later CLs.

+  enum Status {
+    SUCCESS,  // Decryption successfully completed. Decrypted buffer ready.
+    NO_KEY,  // No key is available to decrypt.
+    NEED_MORE_DATA,  // Decoder needs more data to produce an output.
+    ERROR  // Key is available but an error occurred during decryption.
+  };
+
+  // TODO(xhwang): Add comments!
+  Decrypt(DemuxerStream.Type stream_type, MediaDecoderBuffer encrypted)
+      => (Status status, MediaDecoderBuffer? buffer);
+
+  CancelDecrypt(DemuxerStream.Type stream_type);
+
+  InitializeAudioDecoder(AudioDecoderConfig config) => (bool success);
+
+  InitializeVideoDecoder(VideoDecoderConfig config) => (bool success);
+
+  DecryptAndDecodeAudio(MediaDecoderBuffer encrypted)
+      => (Status status, array<AudioBuffer>? audio_buffers);
+
+  DecryptAndDecodeVideo(
+      MediaDecoderBuffer encrypted) => (Status status, VideoFrame? video_frame);
+
+  ResetDecoder(DemuxerStream.Type stream_type);
+
+  DeinitializeDecoder(DemuxerStream.Type stream_type);
+};
+
+interface DecryptorClient {
+  OnNewUsableKey();
+};