Add migration to WebAssembly information to PNaCl / NaCl docs.

native_client_sdk/doc_generated/sdk/download.html

Index: native_client_sdk/doc_generated/sdk/download.html
diff --git a/native_client_sdk/doc_generated/sdk/download.html b/native_client_sdk/doc_generated/sdk/download.html
index 6052da14a168600a4747ad73f8049fc8d4e32bcc..8ec27a922e8dfa426f07e2bcd1940475aa15dcac 100644
--- a/native_client_sdk/doc_generated/sdk/download.html
+++ b/native_client_sdk/doc_generated/sdk/download.html
@@ -1,7 +1,15 @@
 {{+bindTo:partials.standard_nacl_article}}
 
-<section id="download-the-native-client-sdk">
-<span id="download"></span><h1 id="download-the-native-client-sdk"><span id="download"></span>Download the Native Client SDK</h1>
+<b><font color="#cc0000">
+NOTE:
+Deprecation of the technologies described here has been announced
+for platforms other than ChromeOS.<br/>
+Please visit our
+<a href="/native-client/migration">migration guide</a>
+for details.
+</font></b>
+<hr/><section id="download-the-native-client-sdk">
+<h1 id="download-the-native-client-sdk">Download the Native Client SDK</h1>
 <p>This page provides an overview of the Native Client SDK, and instructions for
 downloading and installing the SDK.</p>
 <div id="home">