"index" property should be optional with "chrome.tabs.move"

chrome/common/extensions/docs/tabs.html

Index: chrome/common/extensions/docs/tabs.html
diff --git a/chrome/common/extensions/docs/tabs.html b/chrome/common/extensions/docs/tabs.html
index dfab0959260a8b0c3a9aa81d6929c68a3cb17d90..464326f68f1cc7e9b36abb18810d49ca4a153bfe 100644
--- a/chrome/common/extensions/docs/tabs.html
+++ b/chrome/common/extensions/docs/tabs.html
@@ -1733,7 +1733,7 @@ For other examples and for help in viewing the source code, see
               <div class="summary">
                   <!-- Note: intentionally longer 80 columns -->
                   <span>chrome.tabs.move</span>(<span class="null"><span>integer or array of integer</span>
-                      <var><span>tabIds</span></var></span><span class="null"><span>, </span><span>object</span>
+                      <var><span>tabIds</span></var></span><span class="optional"><span>, </span><span>object</span>
                       <var><span>moveProperties</span></var></span><span class="optional"><span>, </span><span>function</span>
                       <var><span>callback</span></var></span>)</div>
               <div class="description">
@@ -1772,6 +1772,7 @@ For other examples and for help in viewing the source code, see
                 <!-- TYPE -->
                 <div style="display:inline">
                   (
+                    <span class="optional">optional</span>
                     <span id="typeTemplate">
                       <span>
                         <span>object</span>
@@ -1819,6 +1820,7 @@ For other examples and for help in viewing the source code, see
                 <!-- TYPE -->
                 <div style="display:inline">
                   (
+                    <span class="optional">optional</span>
                     <span id="typeTemplate">
                       <span>
                         <span>integer</span>
@@ -1828,7 +1830,7 @@ For other examples and for help in viewing the source code, see
                 </div>
               </em>
           </dt>
-          <dd>The position to move the window to. The provided value will be clamped to between zero and the number of tabs in the window.</dd>
+          <dd>The position to move the window to. The provided value will be clamped to between zero and the number of tabs in the window. Defaults to the index of the last tab in the window.</dd>
           <!-- OBJECT PROPERTIES -->
           <!-- OBJECT METHODS -->
           <!-- OBJECT EVENT FIELDS -->