Per P0 reqs add launch pts + make download obvious. Also misc cpy edits.

native_client_sdk/doc_generated/devguide/coding/file-io.html

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 <section id="file-i-o">
 <span id="devguide-coding-fileio"></span><h1 id="file-i-o"><span id="devguide-coding-fileio"></span>File I/O</h1>
 <div class="contents local" id="contents" style="display: none">
 <ul class="small-gap">
 <li><a class="reference internal" href="#introduction" id="id2">Introduction</a></li>
 <li><a class="reference internal" href="#reference-information" id="id3">Reference information</a></li>
 <li><p class="first"><a class="reference internal" href="#local-file-i-o" id="id4">Local file I/O</a></p>
 <ul class="small-gap">
@@ skipping 19 matching lines @@
 <li><a class="reference internal" href="#loading-a-file" id="id18">Loading a file</a></li>
 <li><a class="reference internal" href="#id1" id="id19">Deleting a file</a></li>
 <li><a class="reference internal" href="#listing-files-in-a-directory" id="id20">Listing files in a directory</a></li>
 <li><a class="reference internal" href="#making-a-new-directory" id="id21">Making a new directory</a></li>
 </ul>
 </li>
 </ul>
 
 </div><section id="introduction">
 <h2 id="introduction">Introduction</h2>
-<p>This chapter describes how to use the <a class="reference external" href="/native-client/pepper_stable/cpp/classpp_1_1_file_i_o">FileIO API</a> to read and write
+<p>This section describes how to use the <a class="reference external" href="/native-client/pepper_stable/cpp/classpp_1_1_file_i_o">FileIO API</a> to read and write
 files using a local secure data store.</p>
 <p>You might use the File IO API with the URL Loading APIs to create an overall
 data download and caching solution for your NaCl applications. For example:</p>
 <ol class="arabic simple">
 <li>Use the File IO APIs to check the local disk to see if a file exists that
 your program needs.</li>
 <li>If the file exists locally, load it into memory using the File IO API. If
 the file doesn&#8217;t exist locally, use the URL Loading API to retrieve the
 file from the server.</li>
 <li>Use the File IO API to write the file to disk.</li>
 <li>Load the file into memory using the File IO API when needed by your
 application.</li>
 </ol>
-<p>The example discussed in this chapter is included in the SDK in the directory
+<p>The example discussed in this section is included in the SDK in the directory
 <code>examples/api/file_io</code>.</p>
 </section><section id="reference-information">
 <h2 id="reference-information">Reference information</h2>
 <p>For reference information related to FileIO, see the following documentation:</p>
 <ul class="small-gap">
 <li><a class="reference external" href="/native-client/pepper_stable/cpp/file__io_8h">file_io.h</a> - API to create a
 FileIO object</li>
 <li><a class="reference external" href="/native-client/pepper_stable/cpp/file__ref_8h">file_ref.h</a> - API to create
 a file reference or &#8220;weak pointer&#8221; to a file in a file system</li>
 <li><a class="reference external" href="/native-client/pepper_stable/cpp/file__system_8h">file_system.h</a> - API to
@@ skipping 423 matching lines @@
     PP_MAKEDIRECTORYFLAG_NONE, pp::BlockUntilComplete());
 if (result != PP_OK) {
   ShowErrorMessage(&quot;Make directory failed&quot;, result);
   return;
 }
 ShowStatusMessage(&quot;Make directory success&quot;);
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