Implement Chromium side of MediaKeys.isTypeSupported().

content/public/common/eme_codec.h

-// 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.
-
-#ifndef CONTENT_PUBLIC_COMMON_EME_CODEC_H_
-#define CONTENT_PUBLIC_COMMON_EME_CODEC_H_
-
-namespace content {
-
-// Defines bitmask values that specify codecs used in Encrypted Media Extension
-// (EME). Each value represents a codec within a specific container.
-// The mask values are stored in a SupportedCodecs.
-enum EmeCodec {
-  EME_CODEC_NONE = 0,
-  EME_CODEC_WEBM_VORBIS = 1 << 0,
-  EME_CODEC_WEBM_AUDIO_ALL = EME_CODEC_WEBM_VORBIS,
-  EME_CODEC_WEBM_VP8 = 1 << 1,
-  EME_CODEC_WEBM_VP9 = 1 << 2,
-  EME_CODEC_WEBM_VIDEO_ALL = (EME_CODEC_WEBM_VP8 | EME_CODEC_WEBM_VP9),
-  EME_CODEC_WEBM_ALL = (EME_CODEC_WEBM_AUDIO_ALL | EME_CODEC_WEBM_VIDEO_ALL),
-#if defined(USE_PROPRIETARY_CODECS)
-  EME_CODEC_MP4_AAC = 1 << 3,
-  EME_CODEC_MP4_AUDIO_ALL = EME_CODEC_MP4_AAC,
-  EME_CODEC_MP4_AVC1 = 1 << 4,
-  EME_CODEC_MP4_VIDEO_ALL = EME_CODEC_MP4_AVC1,
-  EME_CODEC_MP4_ALL = (EME_CODEC_MP4_AUDIO_ALL | EME_CODEC_MP4_VIDEO_ALL),
-  EME_CODEC_ALL = (EME_CODEC_WEBM_ALL | EME_CODEC_MP4_ALL),
-#else
-  EME_CODEC_ALL = EME_CODEC_WEBM_ALL,
-#endif  // defined(USE_PROPRIETARY_CODECS)
-};
-
-typedef uint32 SupportedCodecs;
-
-}  // namespace content
-
-#endif  // CONTENT_PUBLIC_COMMON_EME_CODEC_H_