alloc ArrayBuffers in correct global, fixes #293, thx bzbarsky

Author: JeffH

index.bs

@@ -43,6 +43,8 @@ Markup Shorthands: css off, markdown on
 spec: ECMAScript; urlPrefix: https://tc39.github.io/ecma262/#
     type: method
         for: JSON; text: stringify; url: sec-json.stringify
+    type: dfn
+        text: %ArrayBuffer%; url: sec-arraybuffer-constructor
 
 <!-- spec: HTML; urlPrefix: https://html.spec.whatwg.org/multipage/ -->
 spec: HTML52; urlPrefix: https://w3c.github.io/html/
@@ -184,6 +186,9 @@ below and in [[#index-defined-elsewhere]].
 : DOM
 :: {{DOMException}} and the DOMException values used in this specification are defined in [[!DOM4]].
 
+: ECMAScript
+:: [=%ArrayBuffer%=] is defined in [[!ECMAScript]].
+
 : HTML
 :: The concepts of [=relevant settings object=], [=origin=],
     [=opaque origin=], [=is a registrable domain suffix of or is equal to=], and the {{Navigator}} interface are
@@ -531,12 +536,12 @@ When this method is invoked, the user agent MUST execute the following algorithm
     <dt>If any |authenticator| indicates success,</dt>
     <dd>
         1. [=set/Remove=] |authenticator| from |issuedRequests|.
-        2. Using |global|, let |value| be a new {{ScopedCredentialInfo}} object whose fields are:
+        2. Let |value| be a new {{ScopedCredentialInfo}} object associated with |global| whose fields are:
             : {{ScopedCredentialInfo/clientDataJSON}}
-            :: A new {{ArrayBuffer}} containing the bytes of |clientDataJSON|.
+            :: A new {{ArrayBuffer}}, created using |global|'s [=%ArrayBuffer%=], containing the bytes of |clientDataJSON|.
             : {{ScopedCredentialInfo/attestationObject}}
-            :: A new {{ArrayBuffer}} containing the bytes of the value returned from the successful
-                [=authenticatorMakeCredential=] operation
+            :: A new {{ArrayBuffer}}, created using |global|'s [=%ArrayBuffer%=], containing the bytes of the value returned
+                from the successful [=authenticatorMakeCredential=] operation
         3. [=set/For each=] remaining |authenticator| in |issuedRequests| invoke the [=authenticatorCancel=] operation on
             |authenticator| and [=set/remove=] it from |issuedRequests|.
         4. [=Resolve=] |promise| with |value| and terminate this algorithm.
@@ -670,19 +675,22 @@ When this method is invoked, the user agent MUST execute the following algorithm
     <dt>If any |authenticator| indicates success,</dt>
     <dd>
         1. [=set/Remove=] |authenticator| from |issuedRequests|.
-        2. Using |global|, let |value| be a new {{AuthenticationAssertion}} object whose fields are:
+        2. Let |value| be a new {{AuthenticationAssertion}} object associated with |global| whose fields are:
             : {{AuthenticationAssertion/credential}}
-            :: A new {{ScopedCredential}} object whose fields are:
+            :: A new {{ScopedCredential}} object associated with |global| whose fields are:
                 1. {{ScopedCredential/type}} whose value is the {{ScopedCredentialType}} representing this [=scoped 
                     credential=]'s type.
-                1. {{ScopedCredential/id}} whose value is a new {{ArrayBuffer}} containing the bytes of the credential ID 
-                    returned from the successful [=authenticatorGetAssertion=] operation.
+                1. {{ScopedCredential/id}} whose value is a new {{ArrayBuffer}}, created using |global|'s [=%ArrayBuffer%=],
+                    containing the bytes of the credential ID returned from the successful [=authenticatorGetAssertion=]
+                    operation.
             : {{AuthenticationAssertion/clientDataJSON}}
-            :: A new {{ArrayBuffer}} containing the bytes of |clientDataJSON|
+            :: A new {{ArrayBuffer}}, created using |global|'s [=%ArrayBuffer%=], containing the bytes of |clientDataJSON|
             : {{AuthenticationAssertion/authenticatorData}}
-            :: A new {{ArrayBuffer}} containing the bytes of the returned {{authenticatorData}}
+            :: A new {{ArrayBuffer}}, created using |global|'s [=%ArrayBuffer%=], containing the bytes of the returned
+                {{authenticatorData}}
             : {{AuthenticationAssertion/signature}}
-            :: A new {{ArrayBuffer}} containing the bytes of the returned {{signature}}
+            :: A new {{ArrayBuffer}}, created using |global|'s [=%ArrayBuffer%=], containing the bytes of the returned
+                {{signature}}
         3. [=set/For each=] remaining |authenticator| in |issuedRequests| invoke the [=authenticatorCancel=] operation on
             |authenticator| and [=set/remove=] it from |issuedRequests|.
         4. [=Resolve=] |promise| with |value| and terminate this algorithm.