Use fetch client settings object for fetching dependency modules

Fixes #3757, by plumbing through the appropriate environment settings
object into all the algorithms instead of trying to use the module
script's settings object.

Author: hiroshige-g

source

@@ -24318,8 +24318,8 @@ document.body.appendChild(wbr);</pre>
      <li><p>Let <var>visited set</var> be « <var>url</var> ».</p></li>
 
      <li><p><span data-x="fetch the descendants of and instantiate a module script">Fetch the
-     descendants of and instantiate</span> <var>result</var> given <var>destination</var> and
-     <var>visited set</var>.</p></li>
+     descendants of and instantiate</span> <var>result</var> given <var>settings object</var>,
+     <var>destination</var>, and <var>visited set</var>.</p></li>
     </ol>
 
     <p class="note">Generally, performing these steps will be beneficial for performance, as it
@@ -58217,10 +58217,10 @@ o............A....e
          script</span> to null and return; <span>the script is ready</span>.</p></li>
 
          <li><p><span data-x="fetch the descendants of and instantiate a module script">Fetch the
-         descendants of and instantiate</span> <var>script</var>, given the destination "<code
-         data-x="">script</code>". When this asynchronously completes, set <span
-         data-x="concept-script-script">the script's script</span> to the result. At that time,
-         <span>the script is ready</span>.</p></li>
+         descendants of and instantiate</span> <var>script</var>, given <var>settings object</var>
+         and the destination "<code data-x="">script</code>". When this asynchronously completes,
+         set <span data-x="concept-script-script">the script's script</span> to the result. At
+         that time, <span>the script is ready</span>.</p></li>
         </ol>
        </dd>
       </dl>
@@ -86847,9 +86847,9 @@ interface <dfn>ApplicationCache</dfn> : <span>EventTarget</span> {
 
    <li><p>If the <var>top-level module fetch</var> flag is set, <span data-x="fetch the descendants
    of and instantiate a module script">fetch the descendants of and instantiate</span>
-   <var>result</var> given <var>destination</var> and <var>visited set</var>. Otherwise,
-   <span data-x="fetch the descendants of a module script">fetch the descendants of</span>
-   <var>result</var> given the same arguments.</p></li>
+   <var>result</var> given <var>fetch client settings object</var>, <var>destination</var>, and
+   <var>visited set</var>. Otherwise, <span data-x="fetch the descendants of a module script">fetch
+   the descendants of</span> <var>result</var> given the same arguments.</p></li>
 
    <li><p>When the appropriate algorithm asynchronously completes with <var>final result</var>,
    asynchronously complete this algorithm with <var>final result</var>.</p></li>
@@ -86947,9 +86947,9 @@ interface <dfn>ApplicationCache</dfn> : <span>EventTarget</span> {
   </ol>
 
   <p>To <dfn>fetch the descendants of a module script</dfn> <var>module script</var>, given a
-  <var>destination</var> and a <var>visited set</var>, run these steps. The algorithm will
-  asynchronously complete with either null (on failure) or with <var>module script</var> (on
-  success).</p>
+  <var>fetch client settings object</var>, a <var>destination</var>, and a <var>visited set</var>,
+  run these steps. The algorithm will asynchronously complete with either null (on failure) or
+  with <var>module script</var> (on success).</p>
 
   <ol>
    <li><p>If <var>module script</var>'s <span data-x="concept-script-record">record</span> is null,
@@ -86997,11 +86997,10 @@ interface <dfn>ApplicationCache</dfn> : <span>EventTarget</span> {
    <li>
     <p><span data-x="list iterate">For each</span> <var>url</var> in <var>urls</var>, perform the
     <span>internal module script graph fetching procedure</span> given <var>url</var>,
-    <var>module script</var>'s <span>settings object</span>, <var>destination</var>,
-    <var>options</var>, <var>module script</var>'s <span>settings object</span>,
-    <var>visited set</var>, <var>module script</var>'s <span
-    data-x="concept-script-base-url">base URL</span>, and with the <var>top-level module fetch</var>
-    flag unset. If the caller of this algorithm specified custom <span
+    <var>fetch client settings object</var>, <var>destination</var>, <var>options</var>, <var>module
+    script</var>'s <span>settings object</span>, <var>visited set</var>, <var>module script</var>'s
+    <span data-x="concept-script-base-url">base URL</span>, and with the <var>top-level module
+    fetch</var> flag unset. If the caller of this algorithm specified custom <span
     data-x="fetching-scripts-perform-fetch">perform the fetch</span> steps, pass those along
     while performing the <span>internal module script graph fetching procedure</span>.</p>
 
@@ -87019,15 +87018,16 @@ interface <dfn>ApplicationCache</dfn> : <span>EventTarget</span> {
   </ol>
 
   <p>To <dfn>fetch the descendants of and instantiate a module script</dfn> <var>module
-  script</var>, given a <var>destination</var> and an optional <var>visited set</var>, run these
-  steps. The algorithm will asynchronously complete with either null (on failure) or with
-  <var>module script</var> (on success).</p>
+  script</var>, given a <var>fetch client settings object</var>, a <var>destination</var>, and an
+  optional <var>visited set</var>, run these steps. The algorithm will asynchronously complete with
+  either null (on failure) or with <var>module script</var> (on success).</p>
 
   <ol>
    <li><p>If <var>visited set</var> was not given, let it be an empty <span>set</span>.</p></li>
 
    <li><p><span data-x="fetch the descendants of a module script">Fetch the descendants of</span>
-   <var>module script</var>, given <var>destination</var> and <var>visited set</var>.</p></li>
+   <var>module script</var>, given <var>fetch client settings object</var>, <var>destination</var>,
+   and <var>visited set</var>.</p></li>
 
    <li><p>Return from this algorithm, and run the following steps when <span data-x="fetch the
    descendants of a module script">fetching the descendants of a module script</span> asynchronously