Move EME code out of WebMediaPlayerImpl.

content/renderer/media/webmediaplayer_impl.cc

 // Copyright 2013 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 "content/renderer/media/webmediaplayer_impl.h"
 
 #include <algorithm>
 #include <limits>
 #include <string>
 #include <vector>
 
 #include "base/bind.h"
 #include "base/callback.h"
 #include "base/callback_helpers.h"
 #include "base/command_line.h"
 #include "base/debug/alias.h"
 #include "base/debug/crash_logging.h"
 #include "base/debug/trace_event.h"
 #include "base/message_loop/message_loop_proxy.h"
 #include "base/metrics/histogram.h"
-#include "base/strings/string_number_conversions.h"
-#include "base/strings/utf_string_conversions.h"
 #include "base/synchronization/waitable_event.h"
 #include "cc/blink/web_layer_impl.h"
 #include "cc/layers/video_layer.h"
 #include "content/public/common/content_switches.h"
 #include "content/public/renderer/render_frame.h"
 #include "content/renderer/media/buffered_data_source.h"
-#include "content/renderer/media/crypto/key_systems.h"
+#include "content/renderer/media/crypto/encrypted_media_support.h"
 #include "content/renderer/media/render_media_log.h"
 #include "content/renderer/media/texttrack_impl.h"
 #include "content/renderer/media/webaudiosourceprovider_impl.h"
-#include "content/renderer/media/webcontentdecryptionmodule_impl.h"
 #include "content/renderer/media/webinbandtexttrack_impl.h"
 #include "content/renderer/media/webmediaplayer_delegate.h"
 #include "content/renderer/media/webmediaplayer_params.h"
 #include "content/renderer/media/webmediaplayer_util.h"
 #include "content/renderer/media/webmediasource_impl.h"
-#include "content/renderer/pepper/pepper_webplugin_impl.h"
 #include "content/renderer/render_thread_impl.h"
 #include "gpu/GLES2/gl2extchromium.h"
 #include "gpu/command_buffer/common/mailbox_holder.h"
 #include "media/audio/null_audio_sink.h"
 #include "media/base/audio_hardware_config.h"
 #include "media/base/bind_to_current_loop.h"
 #include "media/base/filter_collection.h"
 #include "media/base/limits.h"
 #include "media/base/media_log.h"
 #include "media/base/media_switches.h"
 #include "media/base/pipeline.h"
 #include "media/base/text_renderer.h"
 #include "media/base/video_frame.h"
 #include "media/filters/audio_renderer_impl.h"
 #include "media/filters/chunk_demuxer.h"
 #include "media/filters/ffmpeg_audio_decoder.h"
 #include "media/filters/ffmpeg_demuxer.h"
 #include "media/filters/ffmpeg_video_decoder.h"
 #include "media/filters/gpu_video_accelerator_factories.h"
 #include "media/filters/gpu_video_decoder.h"
 #include "media/filters/opus_audio_decoder.h"
 #include "media/filters/video_renderer_impl.h"
 #include "media/filters/vpx_video_decoder.h"
-#include "third_party/WebKit/public/platform/WebContentDecryptionModule.h"
-#include "third_party/WebKit/public/platform/WebContentDecryptionModuleResult.h"
 #include "third_party/WebKit/public/platform/WebMediaSource.h"
 #include "third_party/WebKit/public/platform/WebRect.h"
 #include "third_party/WebKit/public/platform/WebSize.h"
 #include "third_party/WebKit/public/platform/WebString.h"
 #include "third_party/WebKit/public/platform/WebURL.h"
-#include "third_party/WebKit/public/web/WebDocument.h"
 #include "third_party/WebKit/public/web/WebLocalFrame.h"
-#include "third_party/WebKit/public/web/WebRuntimeFeatures.h"
 #include "third_party/WebKit/public/web/WebSecurityOrigin.h"
 #include "third_party/WebKit/public/web/WebView.h"
 #include "v8/include/v8.h"
 
-#if defined(ENABLE_PEPPER_CDMS)
-#include "content/renderer/media/crypto/pepper_cdm_wrapper_impl.h"
-#endif
-
 using blink::WebCanvas;
 using blink::WebMediaPlayer;
 using blink::WebRect;
 using blink::WebSize;
 using blink::WebString;
 using media::PipelineStatus;
 
 namespace {
 
 // Amount of extra memory used by each player instance reported to V8.
@@ skipping 18 matching lines @@
 //
 // A very slow speed, ie 0.00000001x, causes the machine to lock up. (It seems
 // like a busy loop). It gets unresponsive, although its not completely dead.
 //
 // Also our timers are not very accurate (especially for ogg), which becomes
 // evident at low speeds and on Vista. Since other speeds are risky and outside
 // the norms, we think 1/16x to 16x is a safe and useful range for now.
 const double kMinRate = 0.0625;
 const double kMaxRate = 16.0;
 
-// Prefix for histograms related to Encrypted Media Extensions.
-const char* kMediaEme = "Media.EME.";
-
 class SyncPointClientImpl : public media::VideoFrame::SyncPointClient {
  public:
   explicit SyncPointClientImpl(
       blink::WebGraphicsContext3D* web_graphics_context)
       : web_graphics_context_(web_graphics_context) {}
   virtual ~SyncPointClientImpl() {}
   virtual uint32 InsertSyncPoint() OVERRIDE {
     return web_graphics_context_->insertSyncPoint();
   }
   virtual void WaitSyncPoint(uint32 sync_point) OVERRIDE {
     web_graphics_context_->waitSyncPoint(sync_point);
   }
 
  private:
   blink::WebGraphicsContext3D* web_graphics_context_;
 };
 
-// Used for calls to decryptor_ready_cb where the result can be ignored.
-void DoNothing(bool) {
-}
-
 }  // namespace
 
 namespace content {
 
 class BufferedDataSourceHostImpl;
 
 #define COMPILE_ASSERT_MATCHING_ENUM(name) \
   COMPILE_ASSERT(static_cast<int>(WebMediaPlayer::CORSMode ## name) == \
                  static_cast<int>(BufferedResourceLoader::k ## name), \
                  mismatching_enums)
@@ skipping 46 matching lines @@
       chunk_demuxer_(NULL),
       // Threaded compositing isn't enabled universally yet.
       compositor_task_runner_(
           RenderThreadImpl::current()->compositor_message_loop_proxy()
               ? RenderThreadImpl::current()->compositor_message_loop_proxy()
               : base::MessageLoopProxy::current()),
       compositor_(new VideoFrameCompositor(
           BIND_TO_RENDER_LOOP(&WebMediaPlayerImpl::OnNaturalSizeChanged),
           BIND_TO_RENDER_LOOP(&WebMediaPlayerImpl::OnOpacityChanged))),
       text_track_index_(0),
-      web_cdm_(NULL) {
+      encrypted_media_support_(EncryptedMediaSupport::create(client)) {
   media_log_->AddEvent(
       media_log_->CreateEvent(media::MediaLogEvent::WEBMEDIAPLAYER_CREATED));
 
   // |gpu_factories_| requires that its entry points be called on its
   // |GetTaskRunner()|.  Since |pipeline_| will own decoders created from the
   // factories, require that their message loops are identical.
   DCHECK(!gpu_factories_ || (gpu_factories_->GetTaskRunner() == media_loop_));
 
   // Let V8 know we started new thread if we did not do it yet.
   // Made separate task to avoid deletion of player currently being created.
@@ skipping 429 matching lines @@
                                     false);
 
   web_graphics_context->deleteTexture(source_texture);
   web_graphics_context->flush();
 
   SyncPointClientImpl client(web_graphics_context);
   video_frame->UpdateReleaseSyncPoint(&client);
   return true;
 }
 
-// Helper functions to report media EME related stats to UMA. They follow the
-// convention of more commonly used macros UMA_HISTOGRAM_ENUMERATION and
-// UMA_HISTOGRAM_COUNTS. The reason that we cannot use those macros directly is
-// that UMA_* macros require the names to be constant throughout the process'
-// lifetime.
-static void EmeUMAHistogramEnumeration(const std::string& key_system,
-                                       const std::string& method,
-                                       int sample,
-                                       int boundary_value) {
-  base::LinearHistogram::FactoryGet(
-      kMediaEme + KeySystemNameForUMA(key_system) + "." + method,
-      1, boundary_value, boundary_value + 1,
-      base::Histogram::kUmaTargetedHistogramFlag)->Add(sample);
-}
-
-static void EmeUMAHistogramCounts(const std::string& key_system,
-                                  const std::string& method,
-                                  int sample) {
-  // Use the same parameters as UMA_HISTOGRAM_COUNTS.
-  base::Histogram::FactoryGet(
-      kMediaEme + KeySystemNameForUMA(key_system) + "." + method,
-      1, 1000000, 50, base::Histogram::kUmaTargetedHistogramFlag)->Add(sample);
-}
-
-// Helper enum for reporting generateKeyRequest/addKey histograms.
-enum MediaKeyException {
-  kUnknownResultId,
-  kSuccess,
-  kKeySystemNotSupported,
-  kInvalidPlayerState,
-  kMaxMediaKeyException
-};
-
-static MediaKeyException MediaKeyExceptionForUMA(
-    WebMediaPlayer::MediaKeyException e) {
-  switch (e) {
-    case WebMediaPlayer::MediaKeyExceptionKeySystemNotSupported:
-      return kKeySystemNotSupported;
-    case WebMediaPlayer::MediaKeyExceptionInvalidPlayerState:
-      return kInvalidPlayerState;
-    case WebMediaPlayer::MediaKeyExceptionNoError:
-      return kSuccess;
-    default:
-      return kUnknownResultId;
-  }
-}
-
-// Helper for converting |key_system| name and exception |e| to a pair of enum
-// values from above, for reporting to UMA.
-static void ReportMediaKeyExceptionToUMA(const std::string& method,
-                                         const std::string& key_system,
-                                         WebMediaPlayer::MediaKeyException e) {
-  MediaKeyException result_id = MediaKeyExceptionForUMA(e);
-  DCHECK_NE(result_id, kUnknownResultId) << e;
-  EmeUMAHistogramEnumeration(
-      key_system, method, result_id, kMaxMediaKeyException);
-}
-
-// Convert a WebString to ASCII, falling back on an empty string in the case
-// of a non-ASCII string.
-static std::string ToASCIIOrEmpty(const blink::WebString& string) {
-  return base::IsStringASCII(string) ? base::UTF16ToASCII(string)
-                                     : std::string();
-}
-
 WebMediaPlayer::MediaKeyException
 WebMediaPlayerImpl::generateKeyRequest(const WebString& key_system,
                                        const unsigned char* init_data,
                                        unsigned init_data_length) {
-  DVLOG(1) << "generateKeyRequest: " << base::string16(key_system) << ": "
-           << std::string(reinterpret_cast<const char*>(init_data),
-                          static_cast<size_t>(init_data_length));
-
-  std::string ascii_key_system =
-      GetUnprefixedKeySystemName(ToASCIIOrEmpty(key_system));
-
-  WebMediaPlayer::MediaKeyException e =
-      GenerateKeyRequestInternal(ascii_key_system, init_data, init_data_length);
-  ReportMediaKeyExceptionToUMA("generateKeyRequest", ascii_key_system, e);
-  return e;
-}
-
-// Guess the type of |init_data|. This is only used to handle some corner cases
-// so we keep it as simple as possible without breaking major use cases.
-static std::string GuessInitDataType(const unsigned char* init_data,
-                                     unsigned init_data_length) {
-  // Most WebM files use KeyId of 16 bytes. MP4 init data are always >16 bytes.
-  if (init_data_length == 16)
-    return "video/webm";
-
-  return "video/mp4";
-}
-
-WebMediaPlayer::MediaKeyException
-WebMediaPlayerImpl::GenerateKeyRequestInternal(const std::string& key_system,
-                                               const unsigned char* init_data,
-                                               unsigned init_data_length) {
   DCHECK(main_loop_->BelongsToCurrentThread());
 
-  if (!IsConcreteSupportedKeySystem(key_system))
-    return WebMediaPlayer::MediaKeyExceptionKeySystemNotSupported;
+  if (!encrypted_media_support_)

[ddorwin, 2014/08/22 21:08:48]

Is this possible given line 190?
Ditto below.

[acolwell GONE FROM CHROMIUM, 2014/08/22 23:20:22]

Yes. That was the idea, but now that I think of it, perhaps it would be better
to just force other embedders to create a fake impl that always returns errors.

+    return MediaKeyExceptionInvalidPlayerState;
 
-  // We do not support run-time switching between key systems for now.
-  if (current_key_system_.empty()) {
-    if (!proxy_decryptor_) {
-      proxy_decryptor_.reset(new ProxyDecryptor(
-#if defined(ENABLE_PEPPER_CDMS)
-          // Create() must be called synchronously as |frame_| may not be
-          // valid afterwards.
-          base::Bind(&PepperCdmWrapperImpl::Create, frame_),
-#elif defined(ENABLE_BROWSER_CDMS)
-#error Browser side CDM in WMPI for prefixed EME API not supported yet.
-#endif
-          BIND_TO_RENDER_LOOP(&WebMediaPlayerImpl::OnKeyAdded),
-          BIND_TO_RENDER_LOOP(&WebMediaPlayerImpl::OnKeyError),
-          BIND_TO_RENDER_LOOP(&WebMediaPlayerImpl::OnKeyMessage)));
-    }
-
-    GURL security_origin(frame_->document().securityOrigin().toString());
-    if (!proxy_decryptor_->InitializeCDM(key_system, security_origin))
-      return WebMediaPlayer::MediaKeyExceptionKeySystemNotSupported;
-
-    if (proxy_decryptor_ && !decryptor_ready_cb_.is_null()) {
-      base::ResetAndReturn(&decryptor_ready_cb_)
-          .Run(proxy_decryptor_->GetDecryptor(), base::Bind(DoNothing));
-    }
-
-    current_key_system_ = key_system;
-  } else if (key_system != current_key_system_) {
-    return WebMediaPlayer::MediaKeyExceptionInvalidPlayerState;
-  }
-
-  std::string init_data_type = init_data_type_;
-  if (init_data_type.empty())
-    init_data_type = GuessInitDataType(init_data, init_data_length);
-
-  // TODO(xhwang): We assume all streams are from the same container (thus have
-  // the same "type") for now. In the future, the "type" should be passed down
-  // from the application.
-  if (!proxy_decryptor_->GenerateKeyRequest(
-           init_data_type, init_data, init_data_length)) {
-    current_key_system_.clear();
-    return WebMediaPlayer::MediaKeyExceptionKeySystemNotSupported;
-  }
-
-  return WebMediaPlayer::MediaKeyExceptionNoError;
+  return encrypted_media_support_->generateKeyRequest(
+      frame_, key_system, init_data, init_data_length);
 }
 
 WebMediaPlayer::MediaKeyException WebMediaPlayerImpl::addKey(
     const WebString& key_system,
     const unsigned char* key,
     unsigned key_length,
     const unsigned char* init_data,
     unsigned init_data_length,
     const WebString& session_id) {
-  DVLOG(1) << "addKey: " << base::string16(key_system) << ": "
-           << std::string(reinterpret_cast<const char*>(key),
-                          static_cast<size_t>(key_length)) << ", "
-           << std::string(reinterpret_cast<const char*>(init_data),
-                          static_cast<size_t>(init_data_length)) << " ["
-           << base::string16(session_id) << "]";
+  DCHECK(main_loop_->BelongsToCurrentThread());
 
-  std::string ascii_key_system =
-      GetUnprefixedKeySystemName(ToASCIIOrEmpty(key_system));
-  std::string ascii_session_id = ToASCIIOrEmpty(session_id);
+  if (!encrypted_media_support_)
+    return MediaKeyExceptionInvalidPlayerState;
 
-  WebMediaPlayer::MediaKeyException e = AddKeyInternal(ascii_key_system,
-                                                       key,
-                                                       key_length,
-                                                       init_data,
-                                                       init_data_length,
-                                                       ascii_session_id);
-  ReportMediaKeyExceptionToUMA("addKey", ascii_key_system, e);
-  return e;
-}
-
-WebMediaPlayer::MediaKeyException WebMediaPlayerImpl::AddKeyInternal(
-    const std::string& key_system,
-    const unsigned char* key,
-    unsigned key_length,
-    const unsigned char* init_data,
-    unsigned init_data_length,
-    const std::string& session_id) {
-  DCHECK(key);
-  DCHECK_GT(key_length, 0u);
-
-  if (!IsConcreteSupportedKeySystem(key_system))
-    return WebMediaPlayer::MediaKeyExceptionKeySystemNotSupported;
-
-  if (current_key_system_.empty() || key_system != current_key_system_)
-    return WebMediaPlayer::MediaKeyExceptionInvalidPlayerState;
-
-  proxy_decryptor_->AddKey(
-      key, key_length, init_data, init_data_length, session_id);
-  return WebMediaPlayer::MediaKeyExceptionNoError;
+  return encrypted_media_support_->addKey(
+      key_system, key, key_length, init_data, init_data_length, session_id);
 }
 
 WebMediaPlayer::MediaKeyException WebMediaPlayerImpl::cancelKeyRequest(
     const WebString& key_system,
     const WebString& session_id) {
-  DVLOG(1) << "cancelKeyRequest: " << base::string16(key_system) << ": "
-           << " [" << base::string16(session_id) << "]";
+  DCHECK(main_loop_->BelongsToCurrentThread());
 
-  std::string ascii_key_system =
-      GetUnprefixedKeySystemName(ToASCIIOrEmpty(key_system));
-  std::string ascii_session_id = ToASCIIOrEmpty(session_id);
+  if (!encrypted_media_support_)
+    return MediaKeyExceptionInvalidPlayerState;
 
-  WebMediaPlayer::MediaKeyException e =
-      CancelKeyRequestInternal(ascii_key_system, ascii_session_id);
-  ReportMediaKeyExceptionToUMA("cancelKeyRequest", ascii_key_system, e);
-  return e;
-}
-
-WebMediaPlayer::MediaKeyException WebMediaPlayerImpl::CancelKeyRequestInternal(
-    const std::string& key_system,
-    const std::string& session_id) {
-  if (!IsConcreteSupportedKeySystem(key_system))
-    return WebMediaPlayer::MediaKeyExceptionKeySystemNotSupported;
-
-  if (current_key_system_.empty() || key_system != current_key_system_)
-    return WebMediaPlayer::MediaKeyExceptionInvalidPlayerState;
-
-  proxy_decryptor_->CancelKeyRequest(session_id);
-  return WebMediaPlayer::MediaKeyExceptionNoError;
+  return encrypted_media_support_->cancelKeyRequest(key_system, session_id);
 }
 
 void WebMediaPlayerImpl::setContentDecryptionModule(
     blink::WebContentDecryptionModule* cdm) {
   DCHECK(main_loop_->BelongsToCurrentThread());
 
-  // TODO(xhwang): Support setMediaKeys(0) if necessary: http://crbug.com/330324
-  if (!cdm)
+  if (!encrypted_media_support_)
     return;
 
-  web_cdm_ = ToWebContentDecryptionModuleImpl(cdm);
-
-  if (web_cdm_ && !decryptor_ready_cb_.is_null())
-    base::ResetAndReturn(&decryptor_ready_cb_)
-        .Run(web_cdm_->GetDecryptor(), base::Bind(DoNothing));
+  encrypted_media_support_->setContentDecryptionModule(cdm);
 }
 
 void WebMediaPlayerImpl::setContentDecryptionModule(
     blink::WebContentDecryptionModule* cdm,
     blink::WebContentDecryptionModuleResult result) {
   DCHECK(main_loop_->BelongsToCurrentThread());
 
-  // TODO(xhwang): Support setMediaKeys(0) if necessary: http://crbug.com/330324
-  if (!cdm) {
-    result.completeWithError(
-        blink::WebContentDecryptionModuleExceptionNotSupportedError,
-        0,
-        "Null MediaKeys object is not supported.");
+  if (!encrypted_media_support_)
     return;
-  }
 
-  web_cdm_ = ToWebContentDecryptionModuleImpl(cdm);
-
-  if (web_cdm_ && !decryptor_ready_cb_.is_null()) {
-    base::ResetAndReturn(&decryptor_ready_cb_)
-        .Run(web_cdm_->GetDecryptor(),
-             BIND_TO_RENDER_LOOP1(
-                 &WebMediaPlayerImpl::ContentDecryptionModuleAttached, result));
-  } else {
-    // No pipeline/decoder connected, so resolve the promise. When something
-    // is connected, setting the CDM will happen in SetDecryptorReadyCB().
-    ContentDecryptionModuleAttached(result, true);
-  }
+  encrypted_media_support_->setContentDecryptionModule(cdm, result);
 }
 
 void WebMediaPlayerImpl::setContentDecryptionModuleSync(
     blink::WebContentDecryptionModule* cdm) {
   DCHECK(main_loop_->BelongsToCurrentThread());
 
-  // Used when loading media and no pipeline/decoder attached yet.
-  DCHECK(decryptor_ready_cb_.is_null());
+  if (!encrypted_media_support_)
+    return;
 
-  web_cdm_ = ToWebContentDecryptionModuleImpl(cdm);
-}
-
-void WebMediaPlayerImpl::ContentDecryptionModuleAttached(
-    blink::WebContentDecryptionModuleResult result,
-    bool success) {
-  if (success) {
-    result.complete();
-    return;
-  }
-
-  result.completeWithError(
-      blink::WebContentDecryptionModuleExceptionNotSupportedError,
-      0,
-      "Unable to set MediaKeys object");
+  encrypted_media_support_->setContentDecryptionModuleSync(cdm);
 }
 
 void WebMediaPlayerImpl::OnPipelineSeeked(bool time_changed,
                                           PipelineStatus status) {
   DVLOG(1) << __FUNCTION__ << "(" << time_changed << ", " << status << ")";
   DCHECK(main_loop_->BelongsToCurrentThread());
   seeking_ = false;
   if (pending_seek_) {
     pending_seek_ = false;
     seek(pending_seek_seconds_);
@@ skipping 24 matching lines @@
 
   if (ready_state_ == WebMediaPlayer::ReadyStateHaveNothing) {
     // Any error that occurs before reaching ReadyStateHaveMetadata should
     // be considered a format error.
     SetNetworkState(WebMediaPlayer::NetworkStateFormatError);
     return;
   }
 
   SetNetworkState(PipelineErrorToNetworkState(error));
 
-  if (error == media::PIPELINE_ERROR_DECRYPT)
-    EmeUMAHistogramCounts(current_key_system_, "DecryptError", 1);
+  if (error == media::PIPELINE_ERROR_DECRYPT && encrypted_media_support_)
+    encrypted_media_support_->OnDecryptError();
 }
 
 void WebMediaPlayerImpl::OnPipelineMetadata(
     media::PipelineMetadata metadata) {
   DVLOG(1) << __FUNCTION__;
 
   pipeline_metadata_ = metadata;
 
   UMA_HISTOGRAM_ENUMERATION("Media.VideoRotation",
                             metadata.video_rotation,
@@ skipping 34 matching lines @@
   if (should_notify_time_changed_)
     client_->timeChanged();
 }
 
 void WebMediaPlayerImpl::OnDemuxerOpened() {
   DCHECK(main_loop_->BelongsToCurrentThread());
   client_->mediaSourceOpened(new WebMediaSourceImpl(
       chunk_demuxer_, base::Bind(&LogMediaSourceError, media_log_)));
 }
 
-void WebMediaPlayerImpl::OnKeyAdded(const std::string& session_id) {
-  DCHECK(main_loop_->BelongsToCurrentThread());
-  EmeUMAHistogramCounts(current_key_system_, "KeyAdded", 1);
-  client_->keyAdded(
-      WebString::fromUTF8(GetPrefixedKeySystemName(current_key_system_)),
-      WebString::fromUTF8(session_id));
-}
-
-void WebMediaPlayerImpl::OnNeedKey(const std::string& type,
-                                   const std::vector<uint8>& init_data) {
-  DCHECK(main_loop_->BelongsToCurrentThread());
-
-  // Do not fire NeedKey event if encrypted media is not enabled.
-  if (!blink::WebRuntimeFeatures::isPrefixedEncryptedMediaEnabled() &&
-      !blink::WebRuntimeFeatures::isEncryptedMediaEnabled()) {
-    return;
-  }
-
-  UMA_HISTOGRAM_COUNTS(kMediaEme + std::string("NeedKey"), 1);
-
-  DCHECK(init_data_type_.empty() || type.empty() || type == init_data_type_);
-  if (init_data_type_.empty())
-    init_data_type_ = type;
-
-  const uint8* init_data_ptr = init_data.empty() ? NULL : &init_data[0];
-  client_->keyNeeded(
-      WebString::fromUTF8(type), init_data_ptr, init_data.size());
-}
-
 void WebMediaPlayerImpl::OnAddTextTrack(
     const media::TextTrackConfig& config,
     const media::AddTextTrackDoneCB& done_cb) {
   DCHECK(main_loop_->BelongsToCurrentThread());
 
   const WebInbandTextTrackImpl::Kind web_kind =
       static_cast<WebInbandTextTrackImpl::Kind>(config.kind());
   const blink::WebString web_label =
       blink::WebString::fromUTF8(config.label());
   const blink::WebString web_language =
       blink::WebString::fromUTF8(config.language());
   const blink::WebString web_id =
       blink::WebString::fromUTF8(config.id());
 
   scoped_ptr<WebInbandTextTrackImpl> web_inband_text_track(
       new WebInbandTextTrackImpl(web_kind, web_label, web_language, web_id,
                                  text_track_index_++));
 
   scoped_ptr<media::TextTrack> text_track(
       new TextTrackImpl(main_loop_, client_, web_inband_text_track.Pass()));
 
   done_cb.Run(text_track.Pass());
 }
 
-void WebMediaPlayerImpl::OnKeyError(const std::string& session_id,
-                                    media::MediaKeys::KeyError error_code,
-                                    uint32 system_code) {
-  DCHECK(main_loop_->BelongsToCurrentThread());
-
-  EmeUMAHistogramEnumeration(current_key_system_, "KeyError",
-                             error_code, media::MediaKeys::kMaxKeyError);
-
-  unsigned short short_system_code = 0;
-  if (system_code > std::numeric_limits<unsigned short>::max()) {
-    LOG(WARNING) << "system_code exceeds unsigned short limit.";
-    short_system_code = std::numeric_limits<unsigned short>::max();
-  } else {
-    short_system_code = static_cast<unsigned short>(system_code);
-  }
-
-  client_->keyError(
-      WebString::fromUTF8(GetPrefixedKeySystemName(current_key_system_)),
-      WebString::fromUTF8(session_id),
-      static_cast<blink::WebMediaPlayerClient::MediaKeyErrorCode>(error_code),
-      short_system_code);
-}
-
-void WebMediaPlayerImpl::OnKeyMessage(const std::string& session_id,
-                                      const std::vector<uint8>& message,
-                                      const GURL& destination_url) {
-  DCHECK(main_loop_->BelongsToCurrentThread());
-
-  DCHECK(destination_url.is_empty() || destination_url.is_valid());
-
-  client_->keyMessage(
-      WebString::fromUTF8(GetPrefixedKeySystemName(current_key_system_)),
-      WebString::fromUTF8(session_id),
-      message.empty() ? NULL : &message[0],
-      message.size(),
-      destination_url);
-}
-
 void WebMediaPlayerImpl::DataSourceInitialized(bool success) {
   DCHECK(main_loop_->BelongsToCurrentThread());
 
   if (!success) {
     SetNetworkState(WebMediaPlayer::NetworkStateFormatError);
     return;
   }
 
   StartPipeline();
 }
@@ skipping 11 matching lines @@
 
 void WebMediaPlayerImpl::StartPipeline() {
   DCHECK(main_loop_->BelongsToCurrentThread());
   const CommandLine* cmd_line = CommandLine::ForCurrentProcess();
 
   // Keep track if this is a MSE or non-MSE playback.
   UMA_HISTOGRAM_BOOLEAN("Media.MSE.Playback",
                         (load_type_ == LoadTypeMediaSource));
 
   media::LogCB mse_log_cb;
+  media::Demuxer::NeedKeyCB need_key_cb;
+
+  if (encrypted_media_support_)
+    need_key_cb = encrypted_media_support_->CreateNeedKeyCB();
 
   // Figure out which demuxer to use.
   if (load_type_ != LoadTypeMediaSource) {
     DCHECK(!chunk_demuxer_);
     DCHECK(data_source_);
 
     demuxer_.reset(new media::FFmpegDemuxer(
         media_loop_, data_source_.get(),
-        BIND_TO_RENDER_LOOP(&WebMediaPlayerImpl::OnNeedKey),
+        need_key_cb,
         media_log_));
   } else {
     DCHECK(!chunk_demuxer_);
     DCHECK(!data_source_);
 
     mse_log_cb = base::Bind(&LogMediaSourceError, media_log_);
 
     chunk_demuxer_ = new media::ChunkDemuxer(
         BIND_TO_RENDER_LOOP(&WebMediaPlayerImpl::OnDemuxerOpened),
-        BIND_TO_RENDER_LOOP(&WebMediaPlayerImpl::OnNeedKey),
+        need_key_cb,
         mse_log_cb,
         true);
     demuxer_.reset(chunk_demuxer_);
   }
 
   scoped_ptr<media::FilterCollection> filter_collection(
       new media::FilterCollection());
   filter_collection->SetDemuxer(demuxer_.get());
 
-  media::SetDecryptorReadyCB set_decryptor_ready_cb =
-      BIND_TO_RENDER_LOOP(&WebMediaPlayerImpl::SetDecryptorReadyCB);
+  media::SetDecryptorReadyCB set_decryptor_ready_cb;
+
+  if (encrypted_media_support_) {
+    set_decryptor_ready_cb =
+        encrypted_media_support_->CreateSetDecryptorReadyCB();
+  }
 
   // Create our audio decoders and renderer.
   ScopedVector<media::AudioDecoder> audio_decoders;
   audio_decoders.push_back(new media::FFmpegAudioDecoder(media_loop_,
                                                          mse_log_cb));
   audio_decoders.push_back(new media::OpusAudioDecoder(media_loop_));
 
   scoped_ptr<media::AudioRenderer> audio_renderer(new media::AudioRendererImpl(
       media_loop_,
       audio_source_provider_.get(),
@@ skipping 120 matching lines @@
 
 void WebMediaPlayerImpl::FrameReady(
     const scoped_refptr<media::VideoFrame>& frame) {
   compositor_task_runner_->PostTask(
       FROM_HERE,
       base::Bind(&VideoFrameCompositor::UpdateCurrentFrame,
                  base::Unretained(compositor_),
                  frame));
 }
 
-void WebMediaPlayerImpl::SetDecryptorReadyCB(
-     const media::DecryptorReadyCB& decryptor_ready_cb) {
-  DCHECK(main_loop_->BelongsToCurrentThread());
-
-  // Cancels the previous decryptor request.
-  if (decryptor_ready_cb.is_null()) {
-    if (!decryptor_ready_cb_.is_null()) {
-      base::ResetAndReturn(&decryptor_ready_cb_)
-          .Run(NULL, base::Bind(DoNothing));
-    }
-    return;
-  }
-
-  // TODO(xhwang): Support multiple decryptor notification request (e.g. from
-  // video and audio). The current implementation is okay for the current
-  // media pipeline since we initialize audio and video decoders in sequence.
-  // But WebMediaPlayerImpl should not depend on media pipeline's implementation
-  // detail.
-  DCHECK(decryptor_ready_cb_.is_null());
-
-  // Mixed use of prefixed and unprefixed EME APIs is disallowed by Blink.
-  DCHECK(!proxy_decryptor_ || !web_cdm_);
-
-  if (proxy_decryptor_) {
-    decryptor_ready_cb.Run(proxy_decryptor_->GetDecryptor(),
-                           base::Bind(DoNothing));
-    return;
-  }
-
-  if (web_cdm_) {
-    decryptor_ready_cb.Run(web_cdm_->GetDecryptor(), base::Bind(DoNothing));
-    return;
-  }
-
-  decryptor_ready_cb_ = decryptor_ready_cb;
-}
-
 static void GetCurrentFrameAndSignal(
     VideoFrameCompositor* compositor,
     scoped_refptr<media::VideoFrame>* video_frame_out,
     base::WaitableEvent* event) {
   TRACE_EVENT0("media", "GetCurrentFrameAndSignal");
   *video_frame_out = compositor->GetCurrentFrame();
   event->Signal();
 }
 
 scoped_refptr<media::VideoFrame>
 WebMediaPlayerImpl::GetCurrentFrameFromCompositor() {
   TRACE_EVENT0("media", "WebMediaPlayerImpl::GetCurrentFrameFromCompositor");
   if (compositor_task_runner_->BelongsToCurrentThread())
     return compositor_->GetCurrentFrame();
 
   // Use a posted task and waitable event instead of a lock otherwise
   // WebGL/Canvas can see different content than what the compositor is seeing.
   scoped_refptr<media::VideoFrame> video_frame;
   base::WaitableEvent event(false, false);
   compositor_task_runner_->PostTask(FROM_HERE,
                                     base::Bind(&GetCurrentFrameAndSignal,
                                                base::Unretained(compositor_),
                                                &video_frame,
                                                &event));
   event.Wait();
   return video_frame;
 }
 
 }  // namespace content