Use the current realm for Response's static methods

Fixes #1603.

fetch.bs

@@ -52,6 +52,7 @@ urlPrefix:https://w3c.github.io/hr-time/#;spec:hr-time
 urlPrefix:https://tc39.es/ecma262/#;type:dfn;spec:ecma-262
     url:realm;text:realm
     url:sec-list-and-record-specification-type;text:Record
+    url:current-realm;text:current realm
 </pre>
 
 <pre class=biblio>
@@ -7804,13 +7805,13 @@ constructor steps are:
  <li><p>Set <a>this</a>'s <a for=Request>request</a> to <var>request</var>.
 
  <li><p>Set <a>this</a>'s <a for=Request>signal</a> to a <a for=/>new</a> {{AbortSignal}} object
- with <a>this</a>'s <a>relevant Realm</a>.
+ with <a>this</a>'s <a>relevant realm</a>.
 
  <li><p>If <var>signal</var> is non-null, then make <a>this</a>'s <a for=Request>signal</a>
  <a for=AbortSignal>follow</a> <var>signal</var>.
 
  <li><p>Set <a>this</a>'s <a for=Request>headers</a> to a <a for=/>new</a> {{Headers}} object with
- <a>this</a>'s <a>relevant Realm</a>, whose <a for=Headers>header list</a> is <var>request</var>'s
+ <a>this</a>'s <a>relevant realm</a>, whose <a for=Headers>header list</a> is <var>request</var>'s
  <a for=request>header list</a> and <a for=Headers>guard</a> is "<code>request</code>".
 
  <li>
@@ -7994,7 +7995,7 @@ set; otherwise false.
 
  <li><p>Let <var>clonedRequestObject</var> be the result of <a for=Request>creating</a> a
  {{Request}} object, given <var>clonedRequest</var>, <a>this</a>'s
- <a for=Request>headers</a>'s <a for=Headers>guard</a>, and <a>this</a>'s <a>relevant Realm</a>.
+ <a for=Request>headers</a>'s <a for=Headers>guard</a>, and <a>this</a>'s <a>relevant realm</a>.
 
  <li><p>Make <var>clonedRequestObject</var>'s <a for=Request>signal</a>
  <a for=AbortSignal>follow</a> <a>this</a>'s <a for=Request>signal</a>.
@@ -8171,7 +8172,7 @@ constructor steps are:
  <li><p>Set <a>this</a>'s <a for=Response>response</a> to a new <a for=/>response</a>.
 
  <li><p>Set <a>this</a>'s <a for=Response>headers</a> to a <a for=/>new</a> {{Headers}} object with
- <a>this</a>'s <a>relevant Realm</a>, whose <a for=Headers>header list</a> is <a>this</a>'s
+ <a>this</a>'s <a>relevant realm</a>, whose <a for=Headers>header list</a> is <a>this</a>'s
  <a for=Response>response</a>'s <a for=response>header list</a> and <a for=Headers>guard</a> is
  "<code>response</code>".
 
@@ -8187,7 +8188,7 @@ constructor steps are:
 
 <p>The static <dfn method for=Response><code>error()</code></dfn> method steps are to return the
 result of <a for=Response>creating</a> a {{Response}} object, given a new <a>network error</a>,
-"<code>immutable</code>", and <a>this</a>'s <a>relevant Realm</a>.
+"<code>immutable</code>", and the <a>current realm</a>.
 
 <div algorithm>
 <p>The static
@@ -8203,8 +8204,7 @@ are:
  <li><p>If <var>status</var> is not a <a>redirect status</a>, then <a>throw</a> a {{RangeError}}.
 
  <li><p>Let <var>responseObject</var> be the result of <a for=Response>creating</a> a {{Response}}
- object, given a new <a for=/>response</a>, "<code>immutable</code>", and <a>this</a>'s
- <a>relevant Realm</a>.
+ object, given a new <a for=/>response</a>, "<code>immutable</code>", and the <a>current realm</a>.
 
  <li><p>Set <var>responseObject</var>'s <a for=Response>response</a>'s <a for=response>status</a> to
  <var>status</var>.
@@ -8232,8 +8232,7 @@ are:
  <li><p>Let <var>body</var> be the result of <a for=BodyInit>extracting</a> <var>bytes</var>.
 
  <li><p>Let <var>responseObject</var> be the result of <a for=Response>creating</a> a {{Response}}
- object, given a new <a for=/>response</a>, "<code>response</code>", and <a>this</a>'s
- <a>relevant Realm</a>.
+ object, given a new <a for=/>response</a>, "<code>response</code>", and the <a>current realm</a>.
 
  <li><p>Perform <a>initialize a response</a> given <var>responseObject</var>, <var>init</var>, and
  (<var>body</var>, "<code>application/json</code>").
@@ -8285,7 +8284,7 @@ otherwise false.
 
  <li><p>Return the result of <a for=Response>creating</a> a {{Response}} object, given
  <var>clonedResponse</var>, <a>this</a>'s <a for=Response>headers</a>'s <a for=Headers>guard</a>,
- and <a>this</a>'s <a>relevant Realm</a>.
+ and <a>this</a>'s <a>relevant realm</a>.
 </ol>
 </div>
 
@@ -8331,7 +8330,7 @@ method steps are:
 
  <li><p>Let <var>responseObject</var> be null.
 
- <li><p>Let <var>relevantRealm</var> be <a>this</a>'s <a>relevant Realm</a>.
+ <li><p>Let <var>relevantRealm</var> be <a>this</a>'s <a>relevant realm</a>.
 
  <li>
   <p>Let <var>locallyAborted</var> be false.