Trying to make RTCDataChannel.send behavior more clear.

webrtc.html

@@ -8894,8 +8894,8 @@ <h2>Dictionary <dfn>RTCDataChannelInit</dfn> Members</h2>
         </li>
         <li>
           <p>If <var>channel</var>'s <a data-for=
-          "RTCDataChannel"><code>readyState</code></a> attribute is
-          <code>connecting</code>, <a>throw</a> an
+          "RTCDataChannel"><code>readyState</code></a> attribute is not
+          <code>open</code>, <a>throw</a> an
           <code>InvalidStateError</code>.</p>
         </li>
         <li>
@@ -8947,10 +8947,14 @@ <h2>Dictionary <dfn>RTCDataChannelInit</dfn> Members</h2>
           <a>throw</a> an <code>InvalidAccessError</code>.</p>
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         <li>
-          <p>Attempt to send <var>data</var> on <var>channel</var>'s
-          <a>underlying data transport</a>. If the data cannot be sent, buffer
-          it, and if this is not possible because the buffer is full,
-          <a>throw</a> an <code>OperationError</code>.</p>
+          <p>Queue <var>data</var> for transmission on <var>channel</var>'s
+          <a>underlying data transport</a>. If queuing <var>data</var> is not
+          possible because no more buffer space is available, <a>throw</a> an
+          <code>OperationError</code>.</p>
+          <div class="note">The actual transmission of data occurs in
+          parallel. If sending data leads to an SCTP-level error, the
+          application will be notified asynchronously through <code><a
+          data-link-for="RTCDataChannel">onerror</a></code>.</div>
         </li>
       </ol>
       <div>