Fix #178 by passing the dictionary as receiver when doing [[Get]]s on it.

Author: bzbarsky

index.bs

@@ -7232,7 +7232,7 @@ the object (or its prototype chain) correspond to [=dictionary members=].
                      :  Null
                      :: |value| is <emu-val>undefined</emu-val>.
                      :  anything else
-                     :: |value| is the result of calling the \[[Get]] internal method on |V| with property name |key|.
+                     :: |value| is the result of calling the \[[Get]] internal method of |V| passing |key| and |V| as arguments.
                 </dl>
             1.  If |value| is not <emu-val>undefined</emu-val>, then:
                 1.  Let |idlValue| be the result of [=converted to an IDL value|converting=] |value| to an IDL value whose type is the type |member| is declared to be of.

index.html

@@ -1544,7 +1544,7 @@
   <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">Web IDL</h1>
-   <h2 class="no-num no-toc no-ref heading settled" id="subtitle"><span class="content">Editor’s Draft, <time class="dt-updated" datetime="2016-09-11">11 September 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="2016-09-22">22 September 2016</time></span></h2>
    <div data-fill-with="spec-metadata">
     <dl>
      <dt>This version:
@@ -7043,7 +7043,7 @@ <h4 class="heading settled" data-level="3.2.21" id="es-dictionary"><span class="
           <dt data-md="">
            <p>anything else</p>
           <dd data-md="">
-           <p><var>value</var> is the result of calling the [[Get]] internal method on <var>V</var> with property name <var>key</var>.</p>
+           <p><var>value</var> is the result of calling the [[Get]] internal method of <var>V</var> passing <var>key</var> and <var>V</var> as arguments.</p>
          </dl>
         <li data-md="">
          <p>If <var>value</var> is not <emu-val>undefined</emu-val>, then:</p>