Revert of media config: expand is_encrypted to a struct. (patchset #23 id:440001 of https://codereview.chromium.org/1490613005/ )

Reason for revert:
Appears to be breaking compile on Win x64 GN (dbg): https://build.chromium.org/p/chromium.win/builders/Win%20x64%20GN%20%28dbg%29/builds/19428

Output:

media_type_converters.obj : error LNK2019: unresolved external symbol "public: __cdecl media::EncryptionScheme::Pattern::Pattern(unsigned int,unsigned int)" (??0Pattern@EncryptionScheme@media@@QEAA@II@Z) referenced in function "public: static class media::EncryptionScheme::Pattern __cdecl mojo::TypeConverter<class media::EncryptionScheme::Pattern,class mojo::InlinedStructPtr<class media::interfaces::Pattern> >::Convert(class mojo::InlinedStructPtr<class media::interfaces::Pattern> const &)" (?Convert@?$TypeConverter@VPattern@EncryptionScheme@media@@V?$InlinedStructPtr@VPattern@interfaces@media@@@mojo@@@mojo@@SA?AVPattern@EncryptionScheme@media@@AEBV?$InlinedStructPtr@VPattern@interfaces@media@@@2@@Z)

media_type_converters.obj : error LNK2019: unresolved external symbol "public: __cdecl media::EncryptionScheme::Pattern::~Pattern(void)" (??1Pattern@EncryptionScheme@media@@QEAA@XZ) referenced in function "public: static class media::EncryptionScheme __cdecl mojo::TypeConverter<class media::EncryptionScheme,class mojo::StructPtr<class media::interfaces::EncryptionScheme> >::Convert(class mojo::StructPtr<class media::interfaces::EncryptionScheme> const &)" (?Convert@?$TypeConverter@VEncryptionScheme@media@@V?$StructPtr@VEncryptionScheme@interfaces@media@@@mojo@@@mojo@@SA?AVEncryptionScheme@media@@AEBV?$StructPtr@VEncryptionScheme@interfaces@media@@@2@@Z)

./media_library.dll : fatal error LNK1120: 2 unresolved externals

Original issue's description:
> media config: expand is_encrypted to a struct.
>
> Provide more complete encryption metadata, rather than
> just a bool. EncryptionScheme also allows specification
> of the mode and the pattern, as will be allowed by
> CENC (ISO's Common Encryption standard), 3rd Edition.
>
> BUG=568326
>
> Committed: https://crrev.com/c9d2206c62f65e29b141e08df2b2dcb88f54162f
> Cr-Commit-Position: refs/heads/master@{#380710}

TBR=dalecurtis@chromium.org,ddorwin@chromium.org,halliwell@chromium.org,lcwu@chromium.org,raymes@chromium.org,xhwang@chromium.org,yucliu@chromium.org,dougsteed@chromium.org
# Skipping CQ checks because original CL landed less than 1 days ago.
NOPRESUBMIT=true
NOTREECHECKS=true
NOTRY=true
BUG=568326

Review URL: https://codereview.chromium.org/1786733004

Cr-Commit-Position: refs/heads/master@{#380732}

18 files changed, 40 insertions, 318 deletions

diff --git a/chromecast/common/media/cma_param_traits.cc b/chromecast/common/media/cma_param_traits.cc
index f0ddc49..f27043d 100644
--- a/chromecast/common/media/cma_param_traits.cc
+++ b/chromecast/common/media/cma_param_traits.cc
@@ -12,7 +12,6 @@
 #include "content/public/common/common_param_traits.h"
 #include "ipc/ipc_message_macros.h"
 #include "media/base/audio_decoder_config.h"
-#include "media/base/encryption_scheme.h"
 #include "media/base/video_decoder_config.h"
 #include "ui/gfx/ipc/gfx_param_traits.h"
 
@@ -30,16 +29,6 @@ IPC_ENUM_TRAITS_MAX_VALUE(media::VideoPixelFormat, media::PIXEL_FORMAT_MAX)
 
 namespace IPC {
 
-template <>
-struct ParamTraits<media::EncryptionScheme::Pattern> {
-  typedef media::EncryptionScheme::Pattern param_type;
-  static void Write(base::Pickle* m, const param_type& p);
-  static bool Read(const base::Pickle* m, base::PickleIterator* iter,
-                   param_type* r);
-  static void Log(const param_type& p, std::string* l);
-};
-
-
 void ParamTraits<media::AudioDecoderConfig>::Write(
     base::Pickle* m,
     const media::AudioDecoderConfig& p) {
@@ -47,7 +36,7 @@ void ParamTraits<media::AudioDecoderConfig>::Write(
   WriteParam(m, p.sample_format());
   WriteParam(m, p.channel_layout());
   WriteParam(m, p.samples_per_second());
-  WriteParam(m, p.encryption_scheme());
+  WriteParam(m, p.is_encrypted());
   WriteParam(m, p.extra_data());
 }
 
@@ -59,17 +48,15 @@ bool ParamTraits<media::AudioDecoderConfig>::Read(
   media::SampleFormat sample_format;
   media::ChannelLayout channel_layout;
   int samples_per_second;
-  media::EncryptionScheme encryption_scheme;
+  bool is_encrypted;
   std::vector<uint8_t> extra_data;
   if (!ReadParam(m, iter, &codec) || !ReadParam(m, iter, &sample_format) ||
       !ReadParam(m, iter, &channel_layout) ||
       !ReadParam(m, iter, &samples_per_second) ||
-      !ReadParam(m, iter, &encryption_scheme) ||
-      !ReadParam(m, iter, &extra_data))
+      !ReadParam(m, iter, &is_encrypted) || !ReadParam(m, iter, &extra_data))
     return false;
   *r = media::AudioDecoderConfig(codec, sample_format, channel_layout,
-                                 samples_per_second, extra_data,
-                                 encryption_scheme);
+                                 samples_per_second, extra_data, is_encrypted);
   return true;
 }
 
@@ -88,7 +75,7 @@ void ParamTraits<media::VideoDecoderConfig>::Write(
   WriteParam(m, p.coded_size());
   WriteParam(m, p.visible_rect());
   WriteParam(m, p.natural_size());
-  WriteParam(m, p.encryption_scheme());
+  WriteParam(m, p.is_encrypted());
   WriteParam(m, p.extra_data());
 }
 
@@ -103,18 +90,17 @@ bool ParamTraits<media::VideoDecoderConfig>::Read(
   gfx::Size coded_size;
   gfx::Rect visible_rect;
   gfx::Size natural_size;
-  media::EncryptionScheme encryption_scheme;
+  bool is_encrypted;
   std::vector<uint8_t> extra_data;
   if (!ReadParam(m, iter, &codec) || !ReadParam(m, iter, &profile) ||
       !ReadParam(m, iter, &format) || !ReadParam(m, iter, &color_space) ||
       !ReadParam(m, iter, &coded_size) || !ReadParam(m, iter, &visible_rect) ||
       !ReadParam(m, iter, &natural_size) ||
-      !ReadParam(m, iter, &encryption_scheme) ||
-      !ReadParam(m, iter, &extra_data))
+      !ReadParam(m, iter, &is_encrypted) || !ReadParam(m, iter, &extra_data))
     return false;
   *r = media::VideoDecoderConfig(codec, profile, format, color_space,
                                  coded_size, visible_rect, natural_size,
-                                 extra_data, encryption_scheme);
+                                 extra_data, is_encrypted);
   return true;
 }
 
@@ -123,45 +109,4 @@ void ParamTraits<media::VideoDecoderConfig>::Log(
   l->append(base::StringPrintf("<VideoDecoderConfig>"));
 }
 
-void ParamTraits<media::EncryptionScheme>::Write(
-    base::Pickle* m, const param_type& p) {
-  WriteParam(m, p.mode());
-  WriteParam(m, p.pattern());
-}
-
-bool ParamTraits<media::EncryptionScheme>::Read(
-    const base::Pickle* m, base::PickleIterator* iter, param_type* r) {
-  media::EncryptionScheme::CipherMode mode;
-  media::EncryptionScheme::Pattern pattern;
-  if (!ReadParam(m, iter, &mode) || !ReadParam(m, iter, &pattern))
-    return false;
-  *r = media::EncryptionScheme(mode, pattern);
-  return true;
-}
-
-void ParamTraits<media::EncryptionScheme>::Log(
-    const param_type& p, std::string* l) {
-  l->append(base::StringPrintf("<EncryptionScheme>"));
-}
-
-void ParamTraits<media::EncryptionScheme::Pattern>::Write(
-    base::Pickle* m, const param_type& p) {
-  WriteParam(m, p.encrypt_blocks());
-  WriteParam(m, p.skip_blocks());
-}
-
-bool ParamTraits<media::EncryptionScheme::Pattern>::Read(
-    const base::Pickle* m, base::PickleIterator* iter, param_type* r) {
-  uint32_t encrypt_blocks, skip_blocks;
-  if (!ReadParam(m, iter, &encrypt_blocks) || !ReadParam(m, iter, &skip_blocks))
-    return false;
-  *r = media::EncryptionScheme::Pattern(encrypt_blocks, skip_blocks);
-  return true;
-}
-
-void ParamTraits<media::EncryptionScheme::Pattern>::Log(
-    const param_type& p, std::string* l) {
-  l->append(base::StringPrintf("<Pattern>"));
-}
-
 }  // namespace IPC
diff --git a/chromecast/common/media/cma_param_traits.h b/chromecast/common/media/cma_param_traits.h
index 879bbf1..c8609a5 100644
--- a/chromecast/common/media/cma_param_traits.h
+++ b/chromecast/common/media/cma_param_traits.h
@@ -10,7 +10,6 @@
 namespace media {
 class AudioDecoderConfig;
 class VideoDecoderConfig;
-class EncryptionScheme;
 }
 
 namespace IPC {
@@ -35,15 +34,6 @@ struct ParamTraits<media::VideoDecoderConfig> {
   static void Log(const param_type& p, std::string* l);
 };
 
-template <>
-struct ParamTraits<media::EncryptionScheme> {
-  typedef media::EncryptionScheme param_type;
-  static void Write(base::Pickle* m, const param_type& p);
-  static bool Read(const base::Pickle* m, base::PickleIterator* iter,
-                   param_type* r);
-  static void Log(const param_type& p, std::string* l);
-};
-
 }  // namespace IPC
 
 #endif  // CHROMECAST_COMMON_MEDIA_CMA_PARAM_TRAITS_H_
diff --git a/chromecast/common/media/cma_param_traits_macros.h b/chromecast/common/media/cma_param_traits_macros.h
index 2aae996..a25e53f 100644
--- a/chromecast/common/media/cma_param_traits_macros.h
+++ b/chromecast/common/media/cma_param_traits_macros.h
@@ -44,8 +44,6 @@ IPC_ENUM_TRAITS_MIN_MAX_VALUE(media::VideoCodec,
                               media::VideoCodec::kUnknownVideoCodec,
                               media::VideoCodec::kVideoCodecMax)
 IPC_ENUM_TRAITS_MAX_VALUE(media::ColorSpace, media::COLOR_SPACE_MAX)
-IPC_ENUM_TRAITS_MAX_VALUE(media::EncryptionScheme::CipherMode,
-                          media::EncryptionScheme::CIPHER_MODE_MAX);
 
 IPC_STRUCT_TRAITS_BEGIN(media::PipelineStatistics)
   IPC_STRUCT_TRAITS_MEMBER(audio_bytes_decoded)
diff --git a/chromecast/media/audio/cast_audio_output_stream.cc b/chromecast/media/audio/cast_audio_output_stream.cc
index fc91d50..ec415d7 100644
--- a/chromecast/media/audio/cast_audio_output_stream.cc
+++ b/chromecast/media/audio/cast_audio_output_stream.cc
@@ -47,6 +47,7 @@ MediaPipelineBackend::AudioDecoder* InitializeBackend(
   audio_config.bytes_per_channel = audio_params.bits_per_sample() / 8;
   audio_config.channel_number = audio_params.channels();
   audio_config.samples_per_second = audio_params.sample_rate();
+  audio_config.is_encrypted = false;
 
   if (!decoder->SetConfig(audio_config))
     return nullptr;
diff --git a/chromecast/media/audio/cast_audio_output_stream_unittest.cc b/chromecast/media/audio/cast_audio_output_stream_unittest.cc
index 8402a6a..a8ad0f0 100644
--- a/chromecast/media/audio/cast_audio_output_stream_unittest.cc
+++ b/chromecast/media/audio/cast_audio_output_stream_unittest.cc
@@ -385,7 +385,7 @@ TEST_F(CastAudioOutputStreamTest, Format) {
     const AudioConfig& audio_config = audio_decoder->config();
     EXPECT_EQ(kCodecPCM, audio_config.codec);
     EXPECT_EQ(kSampleFormatS16, audio_config.sample_format);
-    EXPECT_FALSE(audio_config.encryption_scheme.is_encrypted());
+    EXPECT_FALSE(audio_config.is_encrypted);
 
     CloseStream(stream);
   }
diff --git a/chromecast/media/cma/backend/audio_video_pipeline_device_unittest.cc b/chromecast/media/cma/backend/audio_video_pipeline_device_unittest.cc
index 18de287..7fd2d1d 100644
--- a/chromecast/media/cma/backend/audio_video_pipeline_device_unittest.cc
+++ b/chromecast/media/cma/backend/audio_video_pipeline_device_unittest.cc
@@ -35,7 +35,6 @@
 #include "media/base/audio_decoder_config.h"
 #include "media/base/audio_timestamp_helper.h"
 #include "media/base/decoder_buffer.h"
-#include "media/base/encryption_scheme.h"
 #include "media/base/video_decoder_config.h"
 #include "testing/gtest/include/gtest/gtest.h"
 
@@ -69,7 +68,7 @@ VideoConfig DefaultVideoConfig() {
   default_config.codec = kCodecH264;
   default_config.profile = kH264Main;
   default_config.additional_config = nullptr;
-  default_config.encryption_scheme = Unencrypted();
+  default_config.is_encrypted = false;
   return default_config;
 }
 
@@ -565,7 +564,7 @@ scoped_ptr<BufferFeeder> BufferFeeder::LoadVideo(MediaPipelineBackend* backend,
     video_config.codec = kCodecH264;
     video_config.profile = kH264Main;
     video_config.additional_config = nullptr;
-    video_config.encryption_scheme = Unencrypted();
+    video_config.is_encrypted = false;
   } else {
     base::FilePath file_path = GetTestDataFilePath(filename);
     DemuxResult demux_result = FFmpegDemuxForTest(file_path, false /* audio */);
diff --git a/chromecast/media/cma/base/decoder_config_adapter.cc b/chromecast/media/cma/base/decoder_config_adapter.cc
index 24e8b41..3a8ab39 100644
--- a/chromecast/media/cma/base/decoder_config_adapter.cc
+++ b/chromecast/media/cma/base/decoder_config_adapter.cc
@@ -85,7 +85,7 @@ VideoCodec ToVideoCodec(const ::media::VideoCodec video_codec) {
 
 // Converts ::media::VideoCodecProfile to chromecast::media::VideoProfile.
 VideoProfile ToVideoProfile(const ::media::VideoCodecProfile codec_profile) {
-  switch (codec_profile) {
+  switch(codec_profile) {
     case ::media::H264PROFILE_BASELINE:
       return kH264Baseline;
     case ::media::H264PROFILE_MAIN:
@@ -183,62 +183,6 @@ VideoProfile ToVideoProfile(const ::media::VideoCodecProfile codec_profile) {
   }
 }
 
-::media::EncryptionScheme::CipherMode ToMediaCipherMode(
-    EncryptionScheme::CipherMode mode) {
-  switch (mode) {
-    case EncryptionScheme::CIPHER_MODE_UNENCRYPTED:
-      return ::media::EncryptionScheme::CIPHER_MODE_UNENCRYPTED;
-    case EncryptionScheme::CIPHER_MODE_AES_CTR:
-      return ::media::EncryptionScheme::CIPHER_MODE_AES_CTR;
-    case EncryptionScheme::CIPHER_MODE_AES_CBC:
-      return ::media::EncryptionScheme::CIPHER_MODE_AES_CBC;
-    default:
-      NOTREACHED();
-      return ::media::EncryptionScheme::CIPHER_MODE_UNENCRYPTED;
-  }
-}
-
-EncryptionScheme::CipherMode ToCipherMode(
-    ::media::EncryptionScheme::CipherMode mode) {
-  switch (mode) {
-    case ::media::EncryptionScheme::CIPHER_MODE_UNENCRYPTED:
-      return EncryptionScheme::CIPHER_MODE_UNENCRYPTED;
-    case ::media::EncryptionScheme::CIPHER_MODE_AES_CTR:
-      return EncryptionScheme::CIPHER_MODE_AES_CTR;
-    case ::media::EncryptionScheme::CIPHER_MODE_AES_CBC:
-      return EncryptionScheme::CIPHER_MODE_AES_CBC;
-    default:
-      NOTREACHED();
-      return EncryptionScheme::CIPHER_MODE_UNENCRYPTED;
-  }
-}
-
-EncryptionScheme::Pattern ToPatternSpec(
-    const ::media::EncryptionScheme::Pattern& pattern) {
-  return EncryptionScheme::Pattern(
-      pattern.encrypt_blocks(), pattern.skip_blocks());
-}
-
-::media::EncryptionScheme::Pattern ToMediaPatternSpec(
-    const EncryptionScheme::Pattern& pattern) {
-  return ::media::EncryptionScheme::Pattern(
-      pattern.encrypt_blocks, pattern.skip_blocks);
-}
-
-EncryptionScheme ToEncryptionScheme(
-    const ::media::EncryptionScheme& scheme) {
-  return EncryptionScheme(
-    ToCipherMode(scheme.mode()),
-    ToPatternSpec(scheme.pattern()));
-}
-
-::media::EncryptionScheme ToMediaEncryptionScheme(
-    const EncryptionScheme& scheme) {
-  return ::media::EncryptionScheme(
-    ToMediaCipherMode(scheme.mode),
-    ToMediaPatternSpec(scheme.pattern));
-}
-
 }  // namespace
 
 // static
@@ -257,8 +201,7 @@ AudioConfig DecoderConfigAdapter::ToCastAudioConfig(
       ::media::ChannelLayoutToChannelCount(config.channel_layout()),
   audio_config.samples_per_second = config.samples_per_second();
   audio_config.extra_data = config.extra_data();
-  audio_config.encryption_scheme = ToEncryptionScheme(
-      config.encryption_scheme());
+  audio_config.is_encrypted = config.is_encrypted();
   return audio_config;
 }
 
@@ -269,8 +212,7 @@ AudioConfig DecoderConfigAdapter::ToCastAudioConfig(
       ToMediaAudioCodec(config.codec),
       ToMediaSampleFormat(config.sample_format),
       ToMediaChannelLayout(config.channel_number), config.samples_per_second,
-      config.extra_data,
-      ToMediaEncryptionScheme(config.encryption_scheme));
+      config.extra_data, config.is_encrypted);
 }
 
 // static
@@ -286,8 +228,7 @@ VideoConfig DecoderConfigAdapter::ToCastVideoConfig(
   video_config.codec = ToVideoCodec(config.codec());
   video_config.profile = ToVideoProfile(config.profile());
   video_config.extra_data = config.extra_data();
-  video_config.encryption_scheme = ToEncryptionScheme(
-      config.encryption_scheme());
+  video_config.is_encrypted = config.is_encrypted();
   return video_config;
 }
 
diff --git a/chromecast/media/cma/base/demuxer_stream_for_test.cc b/chromecast/media/cma/base/demuxer_stream_for_test.cc
index 32ee27b..9942545 100644
--- a/chromecast/media/cma/base/demuxer_stream_for_test.cc
+++ b/chromecast/media/cma/base/demuxer_stream_for_test.cc
@@ -63,7 +63,7 @@ void DemuxerStreamForTest::Read(const ReadCB& read_cb) {
                                      visible_rect,
                                      natural_size,
                                      ::media::EmptyExtraData(),
-                                     ::media::Unencrypted());
+                                     false);
 }
 
 ::media::DemuxerStream::Type DemuxerStreamForTest::type() const {
diff --git a/chromecast/media/cma/ipc_streamer/BUILD.gn b/chromecast/media/cma/ipc_streamer/BUILD.gn
index 7d25f45..a3429d6 100644
--- a/chromecast/media/cma/ipc_streamer/BUILD.gn
+++ b/chromecast/media/cma/ipc_streamer/BUILD.gn
@@ -14,8 +14,6 @@ source_set("ipc_streamer") {
     "decoder_buffer_base_marshaller.h",
     "decrypt_config_marshaller.cc",
     "decrypt_config_marshaller.h",
-    "encryption_scheme_marshaller.cc",
-    "encryption_scheme_marshaller.h",
     "video_decoder_config_marshaller.cc",
     "video_decoder_config_marshaller.h",
   ]
diff --git a/chromecast/media/cma/ipc_streamer/audio_decoder_config_marshaller.cc b/chromecast/media/cma/ipc_streamer/audio_decoder_config_marshaller.cc
index 031571a..2798c6b 100644
--- a/chromecast/media/cma/ipc_streamer/audio_decoder_config_marshaller.cc
+++ b/chromecast/media/cma/ipc_streamer/audio_decoder_config_marshaller.cc
@@ -11,7 +11,6 @@
 
 #include "base/logging.h"
 #include "chromecast/media/cma/ipc/media_message.h"
-#include "chromecast/media/cma/ipc_streamer/encryption_scheme_marshaller.h"
 #include "media/base/audio_decoder_config.h"
 
 namespace chromecast {
@@ -28,7 +27,7 @@ void AudioDecoderConfigMarshaller::Write(
   CHECK(msg->WritePod(config.channel_layout()));
   CHECK(msg->WritePod(config.samples_per_second()));
   CHECK(msg->WritePod(config.sample_format()));
-  EncryptionSchemeMarshaller::Write(config.encryption_scheme(), msg);
+  CHECK(msg->WritePod(config.is_encrypted()));
   CHECK(msg->WritePod(config.extra_data().size()));
   if (!config.extra_data().empty())
     CHECK(msg->WriteBuffer(&config.extra_data()[0],
@@ -42,15 +41,15 @@ void AudioDecoderConfigMarshaller::Write(
   ::media::SampleFormat sample_format;
   ::media::ChannelLayout channel_layout;
   int samples_per_second;
+  bool is_encrypted;
   size_t extra_data_size;
   std::vector<uint8_t> extra_data;
-  ::media::EncryptionScheme encryption_scheme;
 
   CHECK(msg->ReadPod(&codec));
   CHECK(msg->ReadPod(&channel_layout));
   CHECK(msg->ReadPod(&samples_per_second));
   CHECK(msg->ReadPod(&sample_format));
-  encryption_scheme = EncryptionSchemeMarshaller::Read(msg);
+  CHECK(msg->ReadPod(&is_encrypted));
   CHECK(msg->ReadPod(&extra_data_size));
 
   CHECK_GE(codec, ::media::kUnknownAudioCodec);
@@ -68,7 +67,7 @@ void AudioDecoderConfigMarshaller::Write(
   return ::media::AudioDecoderConfig(
       codec, sample_format,
       channel_layout, samples_per_second,
-      extra_data, encryption_scheme);
+      extra_data, is_encrypted);
 }
 
 }  // namespace media
diff --git a/chromecast/media/cma/ipc_streamer/encryption_scheme_marshaller.cc b/chromecast/media/cma/ipc_streamer/encryption_scheme_marshaller.cc
deleted file mode 100644
index a88cfc5..0000000
--- a/chromecast/media/cma/ipc_streamer/encryption_scheme_marshaller.cc
+++ /dev/null
@@ -1,54 +0,0 @@
-// Copyright 2015 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.
-
-#include "chromecast/media/cma/ipc_streamer/encryption_scheme_marshaller.h"
-
-#include <stdint.h>
-
-#include "base/logging.h"
-#include "chromecast/media/cma/ipc/media_message.h"
-
-namespace chromecast {
-namespace media {
-
-namespace {
-
-class PatternSpecMarshaller {
- public:
-  static void Write(const ::media::EncryptionScheme::Pattern& pattern,
-                    MediaMessage* msg) {
-    CHECK(msg->WritePod(pattern.encrypt_blocks()));
-    CHECK(msg->WritePod(pattern.skip_blocks()));
-  }
-
-  static ::media::EncryptionScheme::Pattern Read(MediaMessage* msg) {
-    uint32_t encrypt_blocks;
-    uint32_t skip_blocks;
-    CHECK(msg->ReadPod(&encrypt_blocks));
-    CHECK(msg->ReadPod(&skip_blocks));
-    return ::media::EncryptionScheme::Pattern(encrypt_blocks, skip_blocks);
-  }
-};
-
-}  // namespace
-
-// static
-void EncryptionSchemeMarshaller::Write(
-    const ::media::EncryptionScheme& encryption_scheme,
-    MediaMessage* msg) {
-  CHECK(msg->WritePod(encryption_scheme.mode()));
-  PatternSpecMarshaller::Write(encryption_scheme.pattern(), msg);
-}
-
-// static
-::media::EncryptionScheme EncryptionSchemeMarshaller::Read(MediaMessage* msg) {
-  ::media::EncryptionScheme::CipherMode mode;
-  ::media::EncryptionScheme::Pattern pattern;
-  CHECK(msg->ReadPod(&mode));
-  pattern = PatternSpecMarshaller::Read(msg);
-  return ::media::EncryptionScheme(mode, pattern);
-}
-
-}  // namespace media
-}  // namespace chromecast
diff --git a/chromecast/media/cma/ipc_streamer/encryption_scheme_marshaller.h b/chromecast/media/cma/ipc_streamer/encryption_scheme_marshaller.h
deleted file mode 100644
index 0b3371b..0000000
--- a/chromecast/media/cma/ipc_streamer/encryption_scheme_marshaller.h
+++ /dev/null
@@ -1,27 +0,0 @@
-// Copyright 2015 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 CHROMECAST_MEDIA_CMA_IPC_STREAMER_ENCRYPTION_SCHEME_MARSHALLER_H_
-#define CHROMECAST_MEDIA_CMA_IPC_STREAMER_ENCRYPTION_SCHEME_MARSHALLER_H_
-
-#include "media/base/encryption_scheme.h"
-
-namespace chromecast {
-namespace media {
-class MediaMessage;
-
-class EncryptionSchemeMarshaller {
- public:
-  // Writes the serialized structure of |encryption_scheme| into |msg|.
-  static void Write(
-      const ::media::EncryptionScheme& encryption_scheme, MediaMessage* msg);
-
-  // Returns an EncryptionScheme from its serialized structure.
-  static ::media::EncryptionScheme Read(MediaMessage* msg);
-};
-
-}  // namespace media
-}  // namespace chromecast
-
-#endif  // CHROMECAST_MEDIA_CMA_IPC_STREAMER_ENCRYPTION_SCHEME_MARSHALLER_H_
diff --git a/chromecast/media/cma/ipc_streamer/video_decoder_config_marshaller.cc b/chromecast/media/cma/ipc_streamer/video_decoder_config_marshaller.cc
index a471eb6..b2e9aaa 100644
--- a/chromecast/media/cma/ipc_streamer/video_decoder_config_marshaller.cc
+++ b/chromecast/media/cma/ipc_streamer/video_decoder_config_marshaller.cc
@@ -11,7 +11,6 @@
 
 #include "base/logging.h"
 #include "chromecast/media/cma/ipc/media_message.h"
-#include "chromecast/media/cma/ipc_streamer/encryption_scheme_marshaller.h"
 #include "media/base/video_decoder_config.h"
 #include "ui/gfx/geometry/rect.h"
 #include "ui/gfx/geometry/size.h"
@@ -68,7 +67,7 @@ void VideoDecoderConfigMarshaller::Write(
   SizeMarshaller::Write(config.coded_size(), msg);
   RectMarshaller::Write(config.visible_rect(), msg);
   SizeMarshaller::Write(config.natural_size(), msg);
-  EncryptionSchemeMarshaller::Write(config.encryption_scheme(), msg);
+  CHECK(msg->WritePod(config.is_encrypted()));
   CHECK(msg->WritePod(config.extra_data().size()));
   if (!config.extra_data().empty())
     CHECK(msg->WriteBuffer(&config.extra_data()[0],
@@ -85,8 +84,8 @@ void VideoDecoderConfigMarshaller::Write(
   gfx::Size coded_size;
   gfx::Rect visible_rect;
   gfx::Size natural_size;
+  bool is_encrypted;
   size_t extra_data_size;
-  ::media::EncryptionScheme encryption_scheme;
   std::vector<uint8_t> extra_data;
 
   CHECK(msg->ReadPod(&codec));
@@ -96,7 +95,7 @@ void VideoDecoderConfigMarshaller::Write(
   coded_size = SizeMarshaller::Read(msg);
   visible_rect = RectMarshaller::Read(msg);
   natural_size = SizeMarshaller::Read(msg);
-  encryption_scheme = EncryptionSchemeMarshaller::Read(msg);
+  CHECK(msg->ReadPod(&is_encrypted));
   CHECK(msg->ReadPod(&extra_data_size));
 
   CHECK_GE(codec, ::media::kUnknownVideoCodec);
@@ -116,7 +115,7 @@ void VideoDecoderConfigMarshaller::Write(
   return ::media::VideoDecoderConfig(
       codec, profile, format, color_space,
       coded_size, visible_rect, natural_size,
-      extra_data, encryption_scheme);
+      extra_data, is_encrypted);
 }
 
 }  // namespace media
diff --git a/chromecast/media/cma/pipeline/audio_decoder_software_wrapper.cc b/chromecast/media/cma/pipeline/audio_decoder_software_wrapper.cc
index a1cdf95..4b15bcc 100644
--- a/chromecast/media/cma/pipeline/audio_decoder_software_wrapper.cc
+++ b/chromecast/media/cma/pipeline/audio_decoder_software_wrapper.cc
@@ -59,7 +59,7 @@ bool AudioDecoderSoftwareWrapper::SetConfig(const AudioConfig& config) {
     return true;
   }
 
-  if (config.is_encrypted() || !CreateSoftwareDecoder(config))
+  if (config.is_encrypted || !CreateSoftwareDecoder(config))
     return false;
 
   output_config_.codec = media::kCodecPCM;
@@ -67,7 +67,7 @@ bool AudioDecoderSoftwareWrapper::SetConfig(const AudioConfig& config) {
   output_config_.channel_number = 2;
   output_config_.bytes_per_channel = 2;
   output_config_.samples_per_second = config.samples_per_second;
-  output_config_.encryption_scheme = Unencrypted();
+  output_config_.is_encrypted = false;
   return backend_decoder_->SetConfig(output_config_);
 }
 
diff --git a/chromecast/media/cma/pipeline/audio_video_pipeline_impl_unittest.cc b/chromecast/media/cma/pipeline/audio_video_pipeline_impl_unittest.cc
index eba1961..bd747dd 100644
--- a/chromecast/media/cma/pipeline/audio_video_pipeline_impl_unittest.cc
+++ b/chromecast/media/cma/pipeline/audio_video_pipeline_impl_unittest.cc
@@ -66,7 +66,7 @@ class AudioVideoPipelineImplTest
       ::media::AudioDecoderConfig audio_config(
           ::media::kCodecMP3, ::media::kSampleFormatS16,
           ::media::CHANNEL_LAYOUT_STEREO, 44100, ::media::EmptyExtraData(),
-          ::media::Unencrypted());
+          false);
       AvPipelineClient client;
       client.eos_cb = base::Bind(&AudioVideoPipelineImplTest::OnEos,
                                  base::Unretained(this), STREAM_AUDIO);
@@ -80,7 +80,7 @@ class AudioVideoPipelineImplTest
           ::media::kCodecH264, ::media::H264PROFILE_MAIN,
           ::media::PIXEL_FORMAT_I420, ::media::COLOR_SPACE_UNSPECIFIED,
           gfx::Size(640, 480), gfx::Rect(0, 0, 640, 480), gfx::Size(640, 480),
-          ::media::EmptyExtraData(), ::media::Unencrypted()));
+          ::media::EmptyExtraData(), false));
       VideoPipelineClient client;
       client.av_pipeline_client.eos_cb =
           base::Bind(&AudioVideoPipelineImplTest::OnEos, base::Unretained(this),
diff --git a/chromecast/media/cma/test/mock_frame_provider.cc b/chromecast/media/cma/test/mock_frame_provider.cc
index 16d6393..fdab889 100644
--- a/chromecast/media/cma/test/mock_frame_provider.cc
+++ b/chromecast/media/cma/test/mock_frame_provider.cc
@@ -82,7 +82,7 @@ void MockFrameProvider::DoRead(const ReadCB& read_cb) {
         ::media::kCodecH264, ::media::VIDEO_CODEC_PROFILE_UNKNOWN,
         ::media::PIXEL_FORMAT_YV12, ::media::COLOR_SPACE_UNSPECIFIED,
         coded_size, visible_rect, natural_size, ::media::EmptyExtraData(),
-        ::media::Unencrypted());
+        false);
 
     audio_config = ::media::AudioDecoderConfig(
       ::media::kCodecAAC,
@@ -90,7 +90,7 @@ void MockFrameProvider::DoRead(const ReadCB& read_cb) {
       ::media::CHANNEL_LAYOUT_STEREO,
       44100,
       ::media::EmptyExtraData(),
-      ::media::Unencrypted());
+      false);
   }
 
   read_cb.Run(buffer, audio_config, video_config);
diff --git a/chromecast/media/media.gyp b/chromecast/media/media.gyp
index 077ea0c..6cabfc7 100644
--- a/chromecast/media/media.gyp
+++ b/chromecast/media/media.gyp
@@ -229,8 +229,6 @@
         'cma/ipc_streamer/decoder_buffer_base_marshaller.h',
         'cma/ipc_streamer/decrypt_config_marshaller.cc',
         'cma/ipc_streamer/decrypt_config_marshaller.h',
-        'cma/ipc_streamer/encryption_scheme_marshaller.cc',
-        'cma/ipc_streamer/encryption_scheme_marshaller.h',
         'cma/ipc_streamer/video_decoder_config_marshaller.cc',
         'cma/ipc_streamer/video_decoder_config_marshaller.h',
       ],
diff --git a/chromecast/public/media/decoder_config.h b/chromecast/public/media/decoder_config.h
index b82c5c1..261b3f1 100644
--- a/chromecast/public/media/decoder_config.h
+++ b/chromecast/public/media/decoder_config.h
@@ -93,78 +93,13 @@ enum VideoProfile {
   kVideoProfileMax = kDolbyVisionNonCompatible_BL_EL_MD,
 };
 
-// Specification of whether and how the stream is encrypted (in whole or part).
-struct EncryptionScheme {
-  // Algorithm and mode that was used to encrypt the stream.
-  enum CipherMode {
-    CIPHER_MODE_UNENCRYPTED,
-    CIPHER_MODE_AES_CTR,
-    CIPHER_MODE_AES_CBC
-  };
-
-  // CENC 3rd Edition adds pattern encryption, through two new protection
-  // schemes: 'cens' (with AES-CTR) and 'cbcs' (with AES-CBC).
-  // The pattern applies independently to each 'encrypted' part of the frame (as
-  // defined by the relevant subsample entries), and reduces further the
-  // actual encryption applied through a repeating pattern of (encrypt:skip)
-  // 16 byte blocks. For example, in a (1:9) pattern, the first block is
-  // encrypted, and the next nine are skipped. This pattern is applied
-  // repeatedly until the end of the last 16-byte block in the subsample.
-  // Any remaining bytes are left clear.
-  // If either of encrypt_blocks or skip_blocks is 0, pattern encryption is
-  // disabled.
-  struct Pattern {
-    Pattern() {}
-    Pattern(uint32_t encrypt_blocks, uint32_t skip_blocks);
-    ~Pattern() {}
-    bool IsInEffect() const;
-
-    uint32_t encrypt_blocks = 0;
-    uint32_t skip_blocks = 0;
-  };
-
-  EncryptionScheme() {}
-  EncryptionScheme(CipherMode mode, const Pattern& pattern);
-  ~EncryptionScheme() {}
-  bool is_encrypted() const { return mode != CIPHER_MODE_UNENCRYPTED; }
-
-  CipherMode mode = CIPHER_MODE_UNENCRYPTED;
-  Pattern pattern;
-};
-
-inline EncryptionScheme::Pattern::Pattern(uint32_t encrypt_blocks,
-                                          uint32_t skip_blocks)
-    : encrypt_blocks(encrypt_blocks), skip_blocks(skip_blocks) {
-}
-
-inline bool EncryptionScheme::Pattern::IsInEffect() const {
-  return encrypt_blocks != 0 && skip_blocks != 0;
-}
-
-inline EncryptionScheme::EncryptionScheme(CipherMode mode,
-                                          const Pattern& pattern)
-    : mode(mode), pattern(pattern) {
-}
-
-inline EncryptionScheme Unencrypted() {
-  return EncryptionScheme();
-}
-
-inline EncryptionScheme AesCtrEncryptionScheme() {
-  return EncryptionScheme(EncryptionScheme::CIPHER_MODE_AES_CTR,
-                          EncryptionScheme::Pattern());
-}
-
-
-// TODO(erickung): Remove constructor once CMA backend implementation doesn't
+// TODO(erickung): Remove constructor once CMA backend implementation does't
 // create a new object to reset the configuration and use IsValidConfig() to
 // determine if the configuration is still valid or not.
 struct AudioConfig {
   AudioConfig();
   ~AudioConfig();
 
-  bool is_encrypted() const { return encryption_scheme.is_encrypted(); }
-
   // Stream id.
   StreamId id;
   // Audio codec.
@@ -179,8 +114,8 @@ struct AudioConfig {
   int samples_per_second;
   // Extra data buffer for certain codec initialization.
   std::vector<uint8_t> extra_data;
-  // Encryption scheme (if any) used for the content.
-  EncryptionScheme encryption_scheme;
+  // content is encrypted or not.
+  bool is_encrypted;
 };
 
 inline AudioConfig::AudioConfig()
@@ -189,7 +124,8 @@ inline AudioConfig::AudioConfig()
       sample_format(kUnknownSampleFormat),
       bytes_per_channel(0),
       channel_number(0),
-      samples_per_second(0) {
+      samples_per_second(0),
+      is_encrypted(false) {
 }
 
 inline AudioConfig::~AudioConfig() {
@@ -202,8 +138,6 @@ struct VideoConfig {
   VideoConfig();
   ~VideoConfig();
 
-  bool is_encrypted() const { return encryption_scheme.is_encrypted(); }
-
   // Stream Id.
   StreamId id;
   // Video codec.
@@ -216,15 +150,16 @@ struct VideoConfig {
   VideoConfig* additional_config;
   // Extra data buffer for certain codec initialization.
   std::vector<uint8_t> extra_data;
-  // Encryption scheme (if any) used for the content.
-  EncryptionScheme encryption_scheme;
+  // content is encrypted or not.
+  bool is_encrypted;
 };
 
 inline VideoConfig::VideoConfig()
     : id(kPrimary),
       codec(kVideoCodecUnknown),
       profile(kVideoProfileUnknown),
-      additional_config(nullptr) {
+      additional_config(nullptr),
+      is_encrypted(false) {
 }
 
 inline VideoConfig::~VideoConfig() {