Only apply to Window

Author: yoavweiss

index.bs

@@ -1119,11 +1119,10 @@ spec:SRI; urlPrefix: https://w3c.github.io/webappsec-subresource-integrity
       1. [=list/Append=] the result of [=applying algorithm to bytes=] on |response|'s
          [=response/body=] and |algorithm| to |hash list|.
       1. Let |hash| be the result of [=concatenating=] |hash list| with U+002D (-).
-  1.  Let |document URL| be the empty [=string=].
   1.  Let |global| be the |request|'s [=request/client=]'s [=/global object=].
-  1.  If |global| is a {{Window}}, set |document URL| to |global|'s [=document=]'s [=Document/URL=].
+  1.  If |global| is not a {{Window}}, return.
   1.  Let |stripped document URL| to be the result of executing [[#strip-url-for-use-in-reports]]
-      on |document URL|.
+      on |global|'s [=document=]'s [=Document/URL=].
   1.  If |policy|'s [=directive set=] does not contain a [=directive=] named "report-to", return.
   1.  Let |report-to directive| be a [=directive=] named "report-to" from |policy|'s [=directive
       set=].