Incorporate Taylor's comments

w3c · Aug 24, 2017 · f5c3b74 · f5c3b74
1 parent af88e79
commit f5c3b74
Showing 1 changed file with 9 additions and 5 deletions.
diff --git a/webrtc.html b/webrtc.html
@@ -5193,8 +5193,10 @@ <h2>Methods</h2>
               system for sending media of the given kind. It does not reserve
               any resources, ports, or other state but is meant to provide a
               way to discover the types of capabilities of the browser
-              including which codecs may be supported. If the system has no
-              capabilities corresponding to the value of the <var>kind</var>
+              including which codecs may be supported. User agents
+              MUST support <var>kind</var> values of <code>"audio"</code>
+              and <code>"video"</code>. If the system has no capabilities
+              corresponding to the value of the <var>kind</var>
               argument, <code>getCapabilities</code> returns <code>null</code>.</p>
               <p class="fingerprint">These capabilities provide generally
               persistent cross-origin information on the device and thus
@@ -6129,9 +6131,11 @@ <h2>Methods</h2>
               the system for receiving media of the given kind. It does not
               reserve any resources, ports, or other state but is meant to
               provide a way to discover the types of capabilities of the
-              browser including which codecs may be supported. If the system has no
-              capabilities corresponding to the value of the <var>kind</var>
-              argument, <code>getCapabilities</code> returns <code>null</code>.</p>
+              browser including which codecs may be supported. User agents
+              MUST support <var>kind</var> values of <code>"audio"</code>
+              and <code>"video"</code>. If the system has no capabilities
+              corresponding to the value of the <var>kind</var> argument,
+              <code>getCapabilities</code> returns <code>null</code>.</p>
               <p class="fingerprint">These capabilities provide generally
               persistent cross-origin information on the device and thus
               increases the fingerprinting surface of the application. In