Removing "crypto_required" from MediaContentDescription.

webrtc/api/webrtcsession.cc

Index: webrtc/api/webrtcsession.cc
diff --git a/webrtc/api/webrtcsession.cc b/webrtc/api/webrtcsession.cc
index ded3023653247f827c2db0b6fa47f40a1a498aee..fed012af279831f52f1dd08c552cc6bc46bc29de 100644
--- a/webrtc/api/webrtcsession.cc
+++ b/webrtc/api/webrtcsession.cc
@@ -165,7 +165,7 @@ static bool VerifyMediaDescriptions(
 // Checks that each non-rejected content has SDES crypto keys or a DTLS
 // fingerprint. Mismatches, such as replying with a DTLS fingerprint to SDES
 // keys, will be caught in Transport negotiation, and backstopped by Channel's
-// |secure_required| check.
+// |srtp_required| check.
 static bool VerifyCrypto(const SessionDescription* desc,
                          bool dtls_enabled,
                          std::string* error) {
@@ -231,30 +231,6 @@ static bool VerifyIceUfragPwdPresent(const SessionDescription* desc) {
   return true;
 }
 
-// Forces |sdesc->crypto_required| to the appropriate state based on the
-// current security policy, to ensure a failure occurs if there is an error
-// in crypto negotiation.
-// Called when processing the local session description.
-static void UpdateSessionDescriptionSecurePolicy(cricket::CryptoType type,
-                                                 SessionDescription* sdesc) {
-  if (!sdesc) {
-    return;
-  }
-
-  // Updating the |crypto_required_| in MediaContentDescription to the
-  // appropriate state based on the current security policy.
-  for (cricket::ContentInfos::iterator iter = sdesc->contents().begin();
-       iter != sdesc->contents().end(); ++iter) {
-    if (cricket::IsMediaContent(&*iter)) {
-      MediaContentDescription* mdesc =
-          static_cast<MediaContentDescription*> (iter->description);
-      if (mdesc) {
-        mdesc->set_crypto_required(type);
-      }
-    }
-  }
-}
-
 static bool GetAudioSsrcByTrackId(const SessionDescription* session_description,
                                   const std::string& track_id,
                                   uint32_t* ssrc) {
@@ -641,10 +617,6 @@ cricket::BaseChannel* WebRtcSession::GetChannel(
   return nullptr;
 }
 
-void WebRtcSession::SetSdesPolicy(cricket::SecurePolicy secure_policy) {
-  webrtc_session_desc_factory_->SetSdesPolicy(secure_policy);
-}
-
 cricket::SecurePolicy WebRtcSession::SdesPolicy() const {
   return webrtc_session_desc_factory_->SdesPolicy();
 }
@@ -697,14 +669,6 @@ bool WebRtcSession::SetLocalDescription(SessionDescriptionInterface* desc,
     transport_controller_->SetIceRole(cricket::ICEROLE_CONTROLLING);
   }
 
-  cricket::SecurePolicy sdes_policy =
-      webrtc_session_desc_factory_->SdesPolicy();
-  cricket::CryptoType crypto_required = dtls_enabled_ ?
-      cricket::CT_DTLS : (sdes_policy == cricket::SEC_REQUIRED ?
-          cricket::CT_SDES : cricket::CT_NONE);
-  // Update the MediaContentDescription crypto settings as per the policy set.
-  UpdateSessionDescriptionSecurePolicy(crypto_required, desc->description());
-
   local_desc_.reset(desc_temp.release());
 
   // Transport and Media channels will be created only when offer is set.
@@ -1663,7 +1627,8 @@ bool WebRtcSession::CreateVoiceChannel(const cricket::ContentInfo* content,
   bool create_rtcp_transport_channel = !require_rtcp_mux;
   voice_channel_.reset(channel_manager_->CreateVoiceChannel(
       media_controller_, transport_controller_.get(), content->name,
-      bundle_transport, create_rtcp_transport_channel, audio_options_));
+      bundle_transport, create_rtcp_transport_channel, SrtpRequired(),
+      audio_options_));
   if (!voice_channel_) {
     return false;
   }
@@ -1687,7 +1652,8 @@ bool WebRtcSession::CreateVideoChannel(const cricket::ContentInfo* content,
   bool create_rtcp_transport_channel = !require_rtcp_mux;
   video_channel_.reset(channel_manager_->CreateVideoChannel(
       media_controller_, transport_controller_.get(), content->name,
-      bundle_transport, create_rtcp_transport_channel, video_options_));
+      bundle_transport, create_rtcp_transport_channel, SrtpRequired(),
+      video_options_));
   if (!video_channel_) {
     return false;
   }
@@ -1720,7 +1686,7 @@ bool WebRtcSession::CreateDataChannel(const cricket::ContentInfo* content,
   bool create_rtcp_transport_channel = !sctp && !require_rtcp_mux;
   data_channel_.reset(channel_manager_->CreateDataChannel(
       transport_controller_.get(), content->name, bundle_transport,
-      create_rtcp_transport_channel, data_channel_type_));
+      create_rtcp_transport_channel, SrtpRequired(), data_channel_type_));
   if (!data_channel_) {
     return false;
   }
@@ -1928,6 +1894,11 @@ bool WebRtcSession::ReadyToUseRemoteCandidate(
   return transport_controller_->ReadyForRemoteCandidates(transport_name);
 }
 
+bool WebRtcSession::SrtpRequired() const {
+  return dtls_enabled_ ||
+         webrtc_session_desc_factory_->SdesPolicy() == cricket::SEC_REQUIRED;
+}
+
 void WebRtcSession::OnTransportControllerGatheringState(
     cricket::IceGatheringState state) {
   ASSERT(signaling_thread()->IsCurrent());