This includes the extension release notes for Chrome 17.

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

Index: chrome/common/extensions/docs/static/whats_new.html
===================================================================
--- chrome/common/extensions/docs/static/whats_new.html	(revision 120336)
+++ chrome/common/extensions/docs/static/whats_new.html	(working copy)
@@ -7,6 +7,7 @@
 </p>
 
 <ul>
+  <li> <a href="#17">Google Chrome 17</a> </li>
   <li> <a href="#16">Google Chrome 16</a> </li>
   <li> <a href="#15">Google Chrome 15</a> </li>
   <li> <a href="#14">Google Chrome 14</a> </li>
@@ -26,6 +27,53 @@
 <a href="experimental.html">experimental APIs</a>.
 </p>
 
+<h2 id="17"> Google Chrome 17 </h2>
+
+<h4> New APIs </h4>
+  <ul>
+    <li> The
+      <a href="pageCapture.html">page capture API</a>
+      lets you save a tab as MHTML.
+    </li>

[jhurwich, 2012/02/03 23:10:25]

pageCapture will go to stable in M18, not M17

[mkearney, 2012/02/04 00:04:08]

Done.

+    <li> The
+      <a href="webRequest.html">web request API</a>
+      lets you intercept, block, or
+      modify requests in-flight and
+      to observe and analyze traffic.
+      </li>
+  </ul>
+
+<h4> Manifest changes </h4>
+  <ul>
+    <li> The <a href="contentSecurityPolicy.html">content security policy</a>
+      has been updated for
+      <a href="manifest.html#manifest_version">manifest_version 2</a>.
+    </li>

[jhurwich, 2012/02/03 23:10:25]

I'm a little less certain on this one, but isn't manifest_version 2 M18 as well?

[mkearney, 2012/02/04 00:04:08]

Done.

+    <li>
+      Permissions can now be
+      <a href="permissions.html">optional</a>
+      for the content setting API and web navigation API;
+      they can also be optional
+      for the new page capture API and web request API.

[jhurwich, 2012/02/03 23:10:25]

Unfortunately I don't know the details of this, but no pageCapture for M17.

[mkearney, 2012/02/04 00:04:08]

Done.

+  </ul>
+
+<h4> Additions to existing APIs </h4>
+  <ul>
+    <li>The management API's
+    <a href="management.html#type-ExtensionInfo">ExtensionInfo</a> object
+    now has a <code>disabledReason</code> property.
+    </li>
+  </ul>
+
+<h4> Changes to existing APIs </h4>
+
+  <ul>
+    <li>The <a href="omnibox.html">omnibox API</a>
+    now works in
+    <a href="manifest.html#incognito">split incognito mode</a>.
+    </li>
+  </ul>
+
 <h2 id="16"> Google Chrome 16 </h2>
 
 <h4> New APIs </h4>