Use new BufferSource concept from IDL

Overview.html

@@ -7,7 +7,7 @@
 
 <p><a class="logo" href="//whatwg.org/"><img alt="WHATWG" height="100" src="//resources.whatwg.org/logo-fetch.svg" width="100"></a>
 <h1 id="cors">Fetch</h1>
-<h2 class="no-num no-toc" id="living-standard-—-last-updated-3-october-2014">Living Standard — Last Updated 3 October 2014</h2>
+<h2 class="no-num no-toc" id="living-standard-—-last-updated-4-october-2014">Living Standard — Last Updated 4 October 2014</h2>
 
 <dl>
  <dt>Participate:
@@ -2416,7 +2416,7 @@ <h3 id="headers-class"><span class="secno">5.1 </span>Headers class</h3>
 <h3 id="body-mixin"><span class="secno">5.2 </span>Body mixin</h3>
 
 <pre class="idl">typedef object <dfn id="json">JSON</dfn>;
-typedef (ArrayBuffer or ArrayBufferView or <a class="external" href="http://dev.w3.org/2006/webapi/FileAPI/#blob">Blob</a> or <a class="external" href="https://xhr.spec.whatwg.org/#formdata">FormData</a> or USVString or <a class="external" href="https://url.spec.whatwg.org/#urlsearchparams">URLSearchParams</a>) <dfn id="bodyinit">BodyInit</dfn>;</pre>
+typedef (BufferSource or <a class="external" href="http://dev.w3.org/2006/webapi/FileAPI/#blob">Blob</a> or <a class="external" href="https://xhr.spec.whatwg.org/#formdata">FormData</a> or USVString or <a class="external" href="https://url.spec.whatwg.org/#urlsearchparams">URLSearchParams</a>) <dfn id="bodyinit">BodyInit</dfn>;</pre>
 
 <p>To <dfn id="concept-bodyinit-extract" title="concept-BodyInit-extract">extract</dfn> a byte stream and a
 `<code title="">Content-Type</code>` <a href="#concept-header-value" title="concept-header-value">value</a> from
@@ -2431,10 +2431,11 @@ <h3 id="body-mixin"><span class="secno">5.2 </span>Body mixin</h3>
   <p>Switch on <var title="">object</var>'s type:
 
   <dl class="switch">
-   <dt><code title="">ArrayBuffer</code>
-   <dt><code title="">ArrayBufferView</code>
+   <dt><code title="">BufferSource</code>
    <dd>
-    <p>Push a copy of <var title="">object</var>'s contents to <var title="">stream</var>.
+    <p>Push a
+    <a class="external" href="http://heycam.github.io/webidl/#dfn-get-buffer-source-copy" title="get a copy of the bytes held by the buffer source">copy of</a>
+    <var title="">object</var> to <var title="">stream</var>.
 
    <dt><code class="external"><a href="http://dev.w3.org/2006/webapi/FileAPI/#blob">Blob</a></code>
    <dd>
@@ -2460,7 +2461,7 @@ <h3 id="body-mixin"><span class="secno">5.2 </span>Body mixin</h3>
     generated by the
     <a class="external" href="https://html.spec.whatwg.org/multipage/forms.html#multipart/form-data-encoding-algorithm"><code>multipart/form-data</code> encoding algorithm</a>.
 
-   <dt>USVString
+   <dt><code title="">USVString</code>
    <dd>
     <p>Push the result of running <a class="external" href="https://encoding.spec.whatwg.org/#utf-8-encode">utf-8 encode</a> on
     <var title="">object</var> to <var title="">stream</var>.

Overview.src.html

@@ -2371,7 +2371,7 @@ <h3>Headers class</h3>
 <h3>Body mixin</h3>
 
 <pre class=idl>typedef object <dfn>JSON</dfn>;
-typedef (ArrayBuffer or ArrayBufferView or <span data-anolis-spec=fileapi>Blob</span> or <span data-anolis-spec=xhr>FormData</span> or USVString or <span data-anolis-spec=url>URLSearchParams</span>) <dfn>BodyInit</dfn>;</pre>
+typedef (BufferSource or <span data-anolis-spec=fileapi>Blob</span> or <span data-anolis-spec=xhr>FormData</span> or USVString or <span data-anolis-spec=url>URLSearchParams</span>) <dfn>BodyInit</dfn>;</pre>
 
 <p>To <dfn title=concept-BodyInit-extract>extract</dfn> a byte stream and a
 `<code title>Content-Type</code>` <span title=concept-header-value>value</span> from
@@ -2386,10 +2386,11 @@ <h3>Body mixin</h3>
   <p>Switch on <var title>object</var>'s type:
 
   <dl class=switch>
-   <dt><code title>ArrayBuffer</code>
-   <dt><code title>ArrayBufferView</code>
+   <dt><code title>BufferSource</code>
    <dd>
-    <p>Push a copy of <var title>object</var>'s contents to <var title>stream</var>.
+    <p>Push a
+    <span data-anolis-spec=webidl title="get a copy of the bytes held by the buffer source">copy of</span>
+    <var title>object</var> to <var title>stream</var>.
 
    <dt><code data-anolis-spec=fileapi>Blob</code>
    <dd>
@@ -2415,7 +2416,7 @@ <h3>Body mixin</h3>
     generated by the
     <span data-anolis-spec=html><code>multipart/form-data</code> encoding algorithm</span>.
 
-   <dt>USVString
+   <dt><code title>USVString</code>
    <dd>
     <p>Push the result of running <span data-anolis-spec=encoding>utf-8 encode</span> on
     <var title>object</var> to <var title>stream</var>.