Review fixes

webrtc.html

@@ -2621,20 +2621,29 @@ <h2>Attributes</h2>
               <dt><dfn>offerToReceiveAudio</dfn> of type <span class="idlMemberType"><a>boolean</a></span></dt>
               <dd>
                 <p>
-                  When this is given a non-false value, and no outgoing track of
-                  type "audio" is attached to the PeerConnection, createOffer()
-                  will behave as if addTransceiver("audio") had been called prior
-                  to the createOffer() call.
+                  When this is given a non-false value, no outgoing track of
+                  type "audio" is attached to the PeerConnection, and the existing
+                  localDescription (if any) doesn't contain any sendrecv or recv audio media sections,
+                  createOffer() will behave as if addTransceiver("audio") had been called once
+                  prior to the createOffer() call.
+                </p>
+                <p>
+                  In all other situations, it will be disregarded.
                 </p>
               </dd>
               <dt><dfn>offerToReceiveVideo</dfn> of type <span class="idlMemberType"><a>boolean</a></span></dt>
               <dd>
                 <p>
                   When this is given a non-false value, and no outgoing track of
-                  type "audio" is attached to the PeerConnection, createOffer()
+                  type "video" is attached to the PeerConnection, and the existing
+                  localDescription (if any) doesn't contain any sendecv or recv video
+                  media sections, createOffer()
                   will behave as if addTransceiver("video") had been called prior
                   to the createOffer() call.
                 </p>
+                <p>
+                  In all other situations, it will be disregarded.
+                </p>
               </dd>
             </dl>
           </section>