Correct handling of ExtendableEvent's extend lifetime promises

Before this patch, the algorithm used Promise's wait for all language
to wait for the event's extend lifetime promises to settle. This
wasn't correct as it actually intends to wait for all the promises in
the event's extend lifetime promises to settle before allowing the UA
to terminate the SW. This patch fixes the step by replacing "wait for
all" with "wait until all the promise".

Fixes #936.

spec/service_worker/index.bs

@@ -1611,7 +1611,7 @@ spec: webidl; urlPrefix: https://heycam.github.io/webidl/
       <li>Run the following substeps <a>in parallel</a>:
         <ol>
           <li><em>SetupPromiseArray</em>: Set <var>extendLifetimePromises</var> to a copy of <var>e</var>'s <a>extend lifetime promises</a>.</li>
-          <li>Wait until the result of <a>waiting for all</a> of <var>extendLifetimePromises</var> settles.</li>
+          <li>Wait until all the <a>promises</a> in <var>extendLifetimePromises</var> settle.</li>
           <li>If the length of <var>extendLifetimePromises</var> does not equal the length of <var>e</var>'s <a>extend lifetime promises</a>, jump to the step labeled <em>SetupPromiseArray</em>.</li>
           <li>Unset <var>e</var>'s <a>extensions allowed flag</a>.</li>
         </ol>

spec/service_worker/index.html

@@ -1409,7 +1409,7 @@
   <div class="head">
    <p data-fill-with="logo"><a class="logo" href="http://www.w3.org/"> <img alt="W3C" height="48" src="https://www.w3.org/StyleSheets/TR/2016/logos/W3C" width="72"> </a> </p>
    <h1 class="p-name no-ref" id="title">Service Workers Nightly</h1>
-   <h2 class="no-num no-toc no-ref heading settled" id="subtitle"><span class="content">Editor’s Draft, <time class="dt-updated" datetime="2016-08-10">10 August 2016</time></span></h2>
+   <h2 class="no-num no-toc no-ref heading settled" id="subtitle"><span class="content">Editor’s Draft, <time class="dt-updated" datetime="2016-08-11">11 August 2016</time></span></h2>
    <div data-fill-with="spec-metadata">
     <dl>
      <dt>This version:
@@ -2779,7 +2779,7 @@ <h3 class="heading settled" data-level="4.4" id="extendable-event"><span class="
        Run the following substeps <a data-link-type="dfn" href="https://html.spec.whatwg.org/multipage/infrastructure.html#in-parallel">in parallel</a>: 
        <ol>
         <li><em>SetupPromiseArray</em>: Set <var>extendLifetimePromises</var> to a copy of <var>e</var>’s <a data-link-type="dfn" href="#dfn-extend-lifetime-promises" id="ref-for-dfn-extend-lifetime-promises-2">extend lifetime promises</a>.
-        <li>Wait until the result of <a data-link-type="dfn" href="https://www.w3.org/2001/tag/doc/promises-guide#waiting-for-all">waiting for all</a> of <var>extendLifetimePromises</var> settles.
+        <li>Wait until all the <a data-link-type="dfn" href="http://www.ecma-international.org/ecma-262/6.0/#sec-promise-objects">promises</a> in <var>extendLifetimePromises</var> settle.
         <li>If the length of <var>extendLifetimePromises</var> does not equal the length of <var>e</var>’s <a data-link-type="dfn" href="#dfn-extend-lifetime-promises" id="ref-for-dfn-extend-lifetime-promises-3">extend lifetime promises</a>, jump to the step labeled <em>SetupPromiseArray</em>.
         <li>Unset <var>e</var>’s <a data-link-type="dfn" href="#extensions-allowed-flag" id="ref-for-extensions-allowed-flag-2">extensions allowed flag</a>.
        </ol>

spec/service_worker_1/index.bs

@@ -1599,7 +1599,7 @@ spec: webidl; urlPrefix: https://heycam.github.io/webidl/
       <li>Run the following substeps <a>in parallel</a>:
         <ol>
           <li><em>SetupPromiseArray</em>: Set <var>extendLifetimePromises</var> to a copy of <var>e</var>'s <a>extend lifetime promises</a>.</li>
-          <li>Wait until the result of <a>waiting for all</a> of <var>extendLifetimePromises</var> settles.</li>
+          <li>Wait until all the <a>promises</a> in <var>extendLifetimePromises</var> settle.</li>
           <li>If the length of <var>extendLifetimePromises</var> does not equal the length of <var>e</var>'s <a>extend lifetime promises</a>, jump to the step labeled <em>SetupPromiseArray</em>.</li>
           <li>Unset <var>e</var>'s <a>extensions allowed flag</a>.</li>
         </ol>

spec/service_worker_1/index.html

@@ -1409,7 +1409,7 @@
   <div class="head">
    <p data-fill-with="logo"><a class="logo" href="http://www.w3.org/"> <img alt="W3C" height="48" src="https://www.w3.org/StyleSheets/TR/2016/logos/W3C" width="72"> </a> </p>
    <h1 class="p-name no-ref" id="title">Service Workers 1</h1>
-   <h2 class="no-num no-toc no-ref heading settled" id="subtitle"><span class="content">Editor’s Draft, <time class="dt-updated" datetime="2016-08-10">10 August 2016</time></span></h2>
+   <h2 class="no-num no-toc no-ref heading settled" id="subtitle"><span class="content">Editor’s Draft, <time class="dt-updated" datetime="2016-08-11">11 August 2016</time></span></h2>
    <div data-fill-with="spec-metadata">
     <dl>
      <dt>This version:
@@ -2761,7 +2761,7 @@ <h3 class="heading settled" data-level="4.4" id="extendable-event"><span class="
        Run the following substeps <a data-link-type="dfn" href="https://html.spec.whatwg.org/multipage/infrastructure.html#in-parallel">in parallel</a>: 
        <ol>
         <li><em>SetupPromiseArray</em>: Set <var>extendLifetimePromises</var> to a copy of <var>e</var>’s <a data-link-type="dfn" href="#dfn-extend-lifetime-promises" id="ref-for-dfn-extend-lifetime-promises-2">extend lifetime promises</a>.
-        <li>Wait until the result of <a data-link-type="dfn" href="https://www.w3.org/2001/tag/doc/promises-guide#waiting-for-all">waiting for all</a> of <var>extendLifetimePromises</var> settles.
+        <li>Wait until all the <a data-link-type="dfn" href="http://www.ecma-international.org/ecma-262/6.0/#sec-promise-objects">promises</a> in <var>extendLifetimePromises</var> settle.
         <li>If the length of <var>extendLifetimePromises</var> does not equal the length of <var>e</var>’s <a data-link-type="dfn" href="#dfn-extend-lifetime-promises" id="ref-for-dfn-extend-lifetime-promises-3">extend lifetime promises</a>, jump to the step labeled <em>SetupPromiseArray</em>.
         <li>Unset <var>e</var>’s <a data-link-type="dfn" href="#extensions-allowed-flag" id="ref-for-extensions-allowed-flag-2">extensions allowed flag</a>.
        </ol>