--- a/media/webrtc/signaling/gtest/sdp_unittests.cpp
+++ b/media/webrtc/signaling/gtest/sdp_unittests.cpp
@@ -3702,39 +3702,16 @@ TEST_P(NewSdpTest, CheckSsrcInSessionLev
   if (mSdp) {
     ASSERT_FALSE(mSdp->GetMediaSection(0).GetAttributeList().HasAttribute(
           SdpAttribute::kSsrcAttribute));
     ASSERT_FALSE(mSdp->GetAttributeList().HasAttribute(
           SdpAttribute::kSsrcAttribute));
   }
 }
 
-const std::string kSsrcGroupInSessionSDP =
-"v=0" CRLF
-"o=Mozilla-SIPUA-35.0a1 5184 0 IN IP4 0.0.0.0" CRLF
-"s=SIP Call" CRLF
-"c=IN IP4 224.0.0.1/100/12" CRLF
-"t=0 0" CRLF
-"a=ssrc-group:FID 5000" CRLF
-"m=video 9 RTP/SAVPF 120" CRLF
-"c=IN IP4 0.0.0.0" CRLF
-"a=rtpmap:120 VP8/90000" CRLF;
-
-// This may or may not parse, but if it does, the errant attribute
-// should be ignored.
-TEST_P(NewSdpTest, CheckSsrcGroupInSessionLevel) {
-  ParseSdp(kSsrcGroupInSessionSDP, false);
-  if (mSdp) {
-    ASSERT_FALSE(mSdp->GetMediaSection(0).GetAttributeList().HasAttribute(
-          SdpAttribute::kSsrcGroupAttribute));
-    ASSERT_FALSE(mSdp->GetAttributeList().HasAttribute(
-          SdpAttribute::kSsrcGroupAttribute));
-  }
-}
-
 const std::string kMalformedImageattr =
 "v=0" CRLF
 "o=Mozilla-SIPUA-35.0a1 5184 0 IN IP4 0.0.0.0" CRLF
 "s=SIP Call" CRLF
 "c=IN IP4 224.0.0.1/100/12" CRLF
 "t=0 0" CRLF
 "m=video 9 RTP/SAVPF 120" CRLF
 "c=IN IP4 0.0.0.0" CRLF

--- a/media/webrtc/signaling/src/sdp/RsdparsaSdpAttributeList.cpp
+++ b/media/webrtc/signaling/src/sdp/RsdparsaSdpAttributeList.cpp
@@ -388,23 +388,16 @@ RsdparsaSdpAttributeList::GetSsrc() cons
 {
   if (!HasAttribute(SdpAttribute::kSsrcAttribute)) {
     MOZ_CRASH();
   }
   const SdpAttribute* attr = GetAttribute(SdpAttribute::kSsrcAttribute);
   return *static_cast<const SdpSsrcAttributeList*>(attr);
 }
 
-const SdpSsrcGroupAttributeList&
-RsdparsaSdpAttributeList::GetSsrcGroup() const
-{
-  // TODO: See Bug 1437166.
-  MOZ_CRASH("Not yet implemented");
-}
-
 void
 RsdparsaSdpAttributeList::LoadAttribute(RustAttributeList *attributeList,
                                         AttributeType type)
 {
   if(!mAttributes[type]) {
     switch(type) {
       case SdpAttribute::kIceUfragAttribute:
         LoadIceUfrag(attributeList);

--- a/media/webrtc/signaling/src/sdp/RsdparsaSdpAttributeList.h
+++ b/media/webrtc/signaling/src/sdp/RsdparsaSdpAttributeList.h
@@ -40,17 +40,16 @@ public:
   const SdpConnectionAttribute& GetConnection() const override;
   const SdpFingerprintAttributeList& GetFingerprint() const override;
   const SdpGroupAttributeList& GetGroup() const override;
   const SdpOptionsAttribute& GetIceOptions() const override;
   const SdpRtcpAttribute& GetRtcp() const override;
   const SdpRemoteCandidatesAttribute& GetRemoteCandidates() const override;
   const SdpSetupAttribute& GetSetup() const override;
   const SdpSsrcAttributeList& GetSsrc() const override;
-  const SdpSsrcGroupAttributeList& GetSsrcGroup() const override;
   const SdpDtlsMessageAttribute& GetDtlsMessage() const override;
 
   // These attributes can appear multiple times, so the returned
   // classes actually represent a collection of values.
   const std::vector<std::string>& GetCandidate() const override;
   const SdpExtmapAttributeList& GetExtmap() const override;
   const SdpFmtpAttributeList& GetFmtp() const override;
   const SdpImageattrAttributeList& GetImageattr() const override;

--- a/media/webrtc/signaling/src/sdp/SdpAttributeList.h
+++ b/media/webrtc/signaling/src/sdp/SdpAttributeList.h
@@ -63,17 +63,16 @@ public:
   virtual const SdpMsidSemanticAttributeList& GetMsidSemantic() const = 0;
   virtual const SdpRidAttributeList& GetRid() const = 0;
   virtual const SdpRtcpFbAttributeList& GetRtcpFb() const = 0;
   virtual const SdpRtpmapAttributeList& GetRtpmap() const = 0;
   virtual const SdpSctpmapAttributeList& GetSctpmap() const = 0;
   virtual uint32_t GetSctpPort() const = 0;
   virtual uint32_t GetMaxMessageSize() const = 0;
   virtual const SdpSsrcAttributeList& GetSsrc() const = 0;
-  virtual const SdpSsrcGroupAttributeList& GetSsrcGroup() const = 0;
 
   // These attributes are effectively simple types, so we'll make life
   // easy by just returning their value.
   virtual const std::string& GetIcePwd() const = 0;
   virtual const std::string& GetIceUfrag() const = 0;
   virtual const std::string& GetIdentity() const = 0;
   virtual const std::string& GetLabel() const = 0;
   virtual unsigned int GetMaxptime() const = 0;

--- a/media/webrtc/signaling/src/sdp/SipccSdpAttributeList.cpp
+++ b/media/webrtc/signaling/src/sdp/SipccSdpAttributeList.cpp
@@ -1425,22 +1425,16 @@ SipccSdpAttributeList::GetSsrc() const
 {
   if (!HasAttribute(SdpAttribute::kSsrcAttribute)) {
     MOZ_CRASH();
   }
   const SdpAttribute* attr = GetAttribute(SdpAttribute::kSsrcAttribute);
   return *static_cast<const SdpSsrcAttributeList*>(attr);
 }
 
-const SdpSsrcGroupAttributeList&
-SipccSdpAttributeList::GetSsrcGroup() const
-{
-  MOZ_CRASH("Not yet implemented");
-}
-
 void
 SipccSdpAttributeList::Serialize(std::ostream& os) const
 {
   for (size_t i = 0; i < kNumAttributeTypes; ++i) {
     if (mAttributes[i]) {
       os << *mAttributes[i];
     }
   }

--- a/media/webrtc/signaling/src/sdp/SipccSdpAttributeList.h
+++ b/media/webrtc/signaling/src/sdp/SipccSdpAttributeList.h
@@ -44,17 +44,16 @@ public:
       override;
   virtual const SdpGroupAttributeList& GetGroup() const override;
   virtual const SdpOptionsAttribute& GetIceOptions() const override;
   virtual const SdpRtcpAttribute& GetRtcp() const override;
   virtual const SdpRemoteCandidatesAttribute& GetRemoteCandidates() const
       override;
   virtual const SdpSetupAttribute& GetSetup() const override;
   virtual const SdpSsrcAttributeList& GetSsrc() const override;
-  virtual const SdpSsrcGroupAttributeList& GetSsrcGroup() const override;
   virtual const SdpDtlsMessageAttribute& GetDtlsMessage() const override;
 
   // These attributes can appear multiple times, so the returned
   // classes actually represent a collection of values.
   virtual const std::vector<std::string>& GetCandidate() const override;
   virtual const SdpExtmapAttributeList& GetExtmap() const override;
   virtual const SdpFmtpAttributeList& GetFmtp() const override;
   virtual const SdpImageattrAttributeList& GetImageattr() const override;