diff --git a/media/base/media_channel.h b/media/base/media_channel.h
index 416f5e9c2f..e8400a58a9 100644
--- a/media/base/media_channel.h
+++ b/media/base/media_channel.h
@@ -155,24 +155,6 @@ struct VideoOptions {
   }
 };
 
-// TODO(isheriff): Remove this once client usage is fixed to use RtpExtension.
-struct RtpHeaderExtension {
-  RtpHeaderExtension() : id(0) {}
-  RtpHeaderExtension(const std::string& uri, int id) : uri(uri), id(id) {}
-
-  std::string ToString() const {
-    rtc::StringBuilder ost;
-    ost << "{";
-    ost << "uri: " << uri;
-    ost << ", id: " << id;
-    ost << "}";
-    return ost.Release();
-  }
-
-  std::string uri;
-  int id;
-};
-
 class MediaChannel : public sigslot::has_slots<> {
  public:
   class NetworkInterface {
diff --git a/pc/session_description.h b/pc/session_description.h
index 27142e1c72..3405accbf3 100644
--- a/pc/session_description.h
+++ b/pc/session_description.h
@@ -147,13 +147,6 @@ class MediaContentDescription {
     rtp_header_extensions_.push_back(ext);
     rtp_header_extensions_set_ = true;
   }
-  virtual void AddRtpHeaderExtension(const cricket::RtpHeaderExtension& ext) {
-    webrtc::RtpExtension webrtc_extension;
-    webrtc_extension.uri = ext.uri;
-    webrtc_extension.id = ext.id;
-    rtp_header_extensions_.push_back(webrtc_extension);
-    rtp_header_extensions_set_ = true;
-  }
   virtual void ClearRtpHeaderExtensions() {
     rtp_header_extensions_.clear();
     rtp_header_extensions_set_ = true;