Change from getClientExtensionResults function to clientExtensionResults attribute (#810)

* Change from getClientExtensionResults function to clientExtensionResults attribute

* Remove unnecessary internal slot [[clientExtensionsResults]]

* Make a very dense sentence slightly less dense

Author: selfissued

index.bs

@@ -620,7 +620,7 @@ that are returned to the caller when a new credential is created, or a new asser
     interface PublicKeyCredential : Credential {
         [SameObject] readonly attribute ArrayBuffer              rawId;
         [SameObject] readonly attribute AuthenticatorResponse    response;
-        AuthenticationExtensionsClientOutputs getClientExtensionResults();
+        [SameObject] readonly attribute AuthenticationExtensionsClientOutputs clientExtensionResults;
     };
 </xmp>
 <dl dfn-type="attribute" dfn-for="PublicKeyCredential">
@@ -639,10 +639,11 @@ that are returned to the caller when a new credential is created, or a new asser
         the {{PublicKeyCredential}} was created in response to {{CredentialsContainer/get()}}, and this attribute's value
         will be an {{AuthenticatorAssertionResponse}}.
 
-    :   {{PublicKeyCredential/getClientExtensionResults()}}
-    ::  This operation returns the value of {{PublicKeyCredential/[[clientExtensionsResults]]}}, which is a [=map=] containing
-        [=extension identifier=] → [=client extension output=] entries produced by the extension's
-        [=client extension processing=].
+    :   <dfn>clientExtensionResults</dfn>
+    ::  This attribute contains a [=map=] of [=extension identifier=] → [=client extension output=] entries, produced by the
+        [=client extension processing=] of [=client extensions=] requested by the [=[RP]=] upon invocation of either
+        {{CredentialsContainer/create()|navigator.credentials.create()}} or
+        {{CredentialsContainer/get()|navigator.credentials.get()}}.
 
     :   <dfn>\[[type]]</dfn>
     ::  The {{PublicKeyCredential}} [=interface object=]'s {{Credential/[[type]]}} [=internal slot=]'s value is the string
@@ -663,11 +664,6 @@ that are returned to the caller when a new credential is created, or a new asser
         the format or length of this identifier, except that it MUST be sufficient for the platform to uniquely select a key.
         For example, an authenticator without on-board storage may create identifiers containing a [=credential private key=]
         wrapped with a symmetric key that is burned into the authenticator.
-
-    :   <dfn>\[[clientExtensionsResults]]</dfn>
-    ::  This [=internal slot=] contains the results of processing client extensions requested by the [=[RP]=] upon the
-        [=[RP]=]'s invocation of either {{CredentialsContainer/create()|navigator.credentials.create()}} or
-        {{CredentialsContainer/get()|navigator.credentials.get()}}.
 </dl>
 
 {{PublicKeyCredential}}'s [=interface object=] inherits {{Credential}}'s implementation of
@@ -1014,9 +1010,8 @@ When this method is invoked, the user agent MUST execute the following algorithm
                         :   {{AuthenticatorAttestationResponse/attestationObject}}
                         ::  |attestationObject|
 
-                    :   {{PublicKeyCredential/[[clientExtensionsResults]]}}
-                    ::  A new {{ArrayBuffer}}, created using |global|'s [=%ArrayBuffer%=], containing the bytes of
-                        <code>|credentialCreationData|.[=credentialCreationData/clientExtensionResults=]</code>.
+                    :   {{PublicKeyCredential/clientExtensionResults}}
+                    ::  <code>|credentialCreationData|.[=credentialCreationData/clientExtensionResults=]</code>.
 
                 1.  Return |pubKeyCred|.
 
@@ -1359,9 +1354,8 @@ When this method is invoked, the user agent MUST execute the following algorithm
                             [=%ArrayBuffer%=], containing the bytes of
                             <code>|assertionCreationData|.[=assertionCreationData/userHandleResult=]</code>.
 
-                    :   {{PublicKeyCredential/[[clientExtensionsResults]]}}
-                    ::  A new {{ArrayBuffer}}, created using |global|'s [=%ArrayBuffer%=], containing the bytes of
-                        <code>|assertionCreationData|.[=assertionCreationData/clientExtensionResults=]</code>.
+                    :   {{PublicKeyCredential/clientExtensionResults}}
+                    ::  <code>|assertionCreationData|.[=assertionCreationData/clientExtensionResults=]</code>.
 
                 1.  Return |pubKeyCred|.
 
@@ -3747,7 +3741,7 @@ Supported [=client extensions=] are recorded as a dictionary in the [=client dat
 {{CollectedClientData/clientExtensions}}. For each such extension, the client adds an entry to this dictionary with the
 [=extension identifier=] as the key, and the extension's [=client extension input=] as the value.
 
-Likewise, the [=client extension outputs=] are represented as a dictionary in the result of {{PublicKeyCredential/getClientExtensionResults()}}
+Likewise, the [=client extension outputs=] are represented as a dictionary in the {{PublicKeyCredential/clientExtensionResults}} value,
 with [=extension identifiers=] as keys, and the <dfn>client extension output</dfn> value of each extension as the value.
 Like the [=client extension input=], the [=client extension output=] is a value that can be encoded in JSON.