Add a "minimum_chrome_version" key to the manifest.

chrome/common/extensions/docs/static/manifest.html

Index: chrome/common/extensions/docs/static/manifest.html
diff --git a/chrome/common/extensions/docs/static/manifest.html b/chrome/common/extensions/docs/static/manifest.html
index dfa2c9d2b1fc89ae31961053e5f3211e655c8950..802b26ef2d61422bf5c392d79482617141960408 100644
--- a/chrome/common/extensions/docs/static/manifest.html
+++ b/chrome/common/extensions/docs/static/manifest.html
@@ -36,6 +36,7 @@ are <b>name</b> and <b>version</b>.
   "<a href="background_pages.html">background_page</a>": "<em>aFile</em>.html",
   "<a href="override.html">chrome_url_overrides</a>": {...},
   "<a href="content_scripts.html">content_scripts</a>": [...],
+  "<a href="#minimum_chrome_version">minimum_chrome_version</a>": "x.y",
   "<a href="options.html">options_page</a>": "<em>aFile</em>.html",
   "<a href="#permissions">permissions</a>": [...],
   "<a href="npapi.html">plugins</a>": [...],
@@ -112,6 +113,13 @@ extension management UI,
 and the <a href="https://chrome.google.com/extensions">extension gallery</a>.
 </p>
 
+<h3 id="minimum_chrome_version">Minimum Chrome Version</h3>
+
+<p>
+The version of Google Chrome that your extension requires, if any.
+The format for this string is the same as for the <a href="#version">version
+field</a>.
+
 <h3 id="permissions">permissions</h3>
 
 <p>