Doc server manifest page generation

chrome/common/extensions/docs/templates/articles/manifest/key.html

Index: chrome/common/extensions/docs/templates/articles/manifest/key.html
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+<h1 id="key">Manifest - Key</h1>
+
+<p>
+This value can be used to control
+the unique ID of an extension, app, or theme when
+it is loaded during development.
+</p>
+
+<p class="note">
+<b>Note:</b> You don't usually need to
+use this value. Instead, write your
+code so that the key value doesn't matter
+by using <a href="http://developer.chrome.com/extensions/overview.html#relative-urls">relative paths</a>
+and <a href="http://developer.chrome.com/extensions/extension.html#method-getURL">extension.getURL</a>.
+</p>
+
+<p>
+To get a suitable key value, first
+install your extension from a <code>.crx</code> file
+(you may need to
+<a href="https://chrome.google.com/webstore/developer/dashboard">upload your extension</a>
+or <a href="http://developer.chrome.com/extensions/packaging.html">package it manually</a>).
+Then, in your
+<a href="http://www.chromium.org/user-experience/user-data-directory">user
+data directory</a>, look in the file
+<code>Default/Extensions/<em>&lt;extensionId&gt;</em>/<em>&lt;versionString&gt;</em>/manifest.json</code>.
+You will see the key value filled in there.
+</p>