Remove .html extension from links

chrome/common/extensions/docs/templates/articles/a11y.html

Index: chrome/common/extensions/docs/templates/articles/a11y.html
diff --git a/chrome/common/extensions/docs/templates/articles/a11y.html b/chrome/common/extensions/docs/templates/articles/a11y.html
index 50c6b473087533816e4dde58b82756a2a2028443..60277c34f53f11c47590f6e043a320c262ecd8c3 100644
--- a/chrome/common/extensions/docs/templates/articles/a11y.html
+++ b/chrome/common/extensions/docs/templates/articles/a11y.html
@@ -303,7 +303,7 @@ is to list them somewhere.
   Your application's options page
 {{:is_apps}}
   Your extension's
-  <a href="options.html">Options page</a>
+  <a href="options">Options page</a>
 {{/is_apps}}
 might be a good place to do this.
 </p>
@@ -404,7 +404,7 @@ and is accessible to people using screen readers.
 <p>
 Check that there is sufficient contrast between
 background color and foreground/text color in your extension.
-<a href="http://snook.ca/technical/colour_contrast/colour.html">This contrast checking tool</a>
+<a href="http://snook.ca/technical/colour_contrast/colour">This contrast checking tool</a>
 checks whether your background and foreground colors
 provide appropriate contrast.
 If you’re developing in a Windows environment,
@@ -467,4 +467,4 @@ For an example that implements keyboard navigation and ARIA properties, see
 (compare it to
 <a href="http://src.chromium.org/viewvc/chrome/trunk/src/chrome/common/extensions/docs/examples/extensions/news/">examples/extensions/news</a>).
 For more examples and for help in viewing the source code,
-see <a href="samples.html">Samples</a>.
+see <a href="samples">Samples</a>.