Fix some typos, broken links and other issues in extension docs

chrome/common/extensions/docs/templates/intros/downloads.html

Index: chrome/common/extensions/docs/templates/intros/downloads.html
===================================================================
--- chrome/common/extensions/docs/templates/intros/downloads.html	(revision 181647)
+++ chrome/common/extensions/docs/templates/intros/downloads.html	(working copy)
@@ -5,7 +5,7 @@
 
 <p> You must declare the 'downloads' permission in the <a
 href='manifest.html'>extension manifest</a> to use this API, along with <a
-href='manifest.html#permissions'>host permissions</a> for any hosts that you
+href='declare_permissions.html'>host permissions</a> for any hosts that you
 may pass to $ref:downloads.download.</p>
 
 <pre>{
@@ -30,4 +30,4 @@
 <p>You can find simple examples of using the downloads module in the <a
 href='http://src.chromium.org/viewvc/chrome/trunk/src/chrome/common/extensions/docs/examples/api/downloads/'>examples/api/downloads</a>
 directory. For other examples and for help in viewing the source code, see <a
-href='samples.html'>Samples</a>.</p>
+href='samples.html'>Samples</a>.</p>