Added introductory tables to Chrome apps APIs.

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

Index: chrome/common/extensions/docs/templates/intros/usb.html
diff --git a/chrome/common/extensions/docs/templates/intros/usb.html b/chrome/common/extensions/docs/templates/intros/usb.html
index 27680cf283a421f119d2d122d8fb7e21d8ff1448..beb0f3bc612fc2278cdb3c31141443d499f85ef9 100644
--- a/chrome/common/extensions/docs/templates/intros/usb.html
+++ b/chrome/common/extensions/docs/templates/intros/usb.html
@@ -1,14 +1,28 @@
-<p id="classSummary">
-Use the <code>chrome.usb</code> module
-to interact with connected USB devices.
-This API provides access to USB operations
-from within the context of an app or extension.
-Using this API,
-apps and extensions can function as drivers
-for hardware devices.
-</p>
-
-<h4>Related Documentation</h4>
-<ul>
-	<li><a href="app_hardware.html">Accessing Hardware Devices</a></li>
-</ul>
+<table class="intro">
+  <tr>
+    <th scope="col"></th>
+    <th scope="col"></th>
+  </tr>
+  <tr>
+    <td><strong>Description:</strong></td>
+    <td>Use the <code>chrome.usb</code> module
+    to interact with connected USB devices.
+    This API provides access to USB operations
+    from within the context of an app or extension.
+    Using this API,
+    apps and extensions can function as drivers
+    for hardware devices.</td>
+  </tr>
+  <tr>
+    <td><strong>Availability:</strong></td>
+    <td>Google Chrome Dev Channel Only</td>
+  </tr>
+  <tr>
+    <td><strong>Permissions:</strong></td>
+    <td><code>"usb"</code></td>
+  </tr>
+  <tr>
+    <td><strong>Learn more:</strong></td>
+    <td><a href="app_hardware.html">Accessing Hardware Devices</a></td>
+  </tr>
+</table>