Make the extension API docs point out the minimum version that supports an API call.

chrome/common/extensions/docs/experimental.infobars.html

Index: chrome/common/extensions/docs/experimental.infobars.html
diff --git a/chrome/common/extensions/docs/experimental.infobars.html b/chrome/common/extensions/docs/experimental.infobars.html
index 97acc36358137d0d28967e19e63ab2ac4fa1ed28..671e2d6430317e4e8460c9973d94b8eb0e43ab86 100644
--- a/chrome/common/extensions/docs/experimental.infobars.html
+++ b/chrome/common/extensions/docs/experimental.infobars.html
@@ -59,6 +59,15 @@
           <dd>
             Description of this parameter from the json schema.
           </dd>
+          <dd>
+            This parameter was added in version
+            <b><span></span></b>.
+            You must omit this parameter in earlier versions,
+            and you may omit it in any version.  If you require this
+            parameter, the manifest key
+            <a href="manifest.html#minimum_chrome_version">minimum_chrome_version</a>
+            can ensure that your extension won't be run in an earlier browser version.
+          </dd>
 
           <!-- OBJECT PROPERTIES -->
           <dd>
@@ -343,6 +352,15 @@ see the <a href="experimental.html">chrome.experimental.* APIs</a> page.
           <dd style="display: none; ">
             Description of this parameter from the json schema.
           </dd>
+          <dd style="display: none; ">
+            This parameter was added in version
+            <b><span></span></b>.
+            You must omit this parameter in earlier versions,
+            and you may omit it in any version.  If you require this
+            parameter, the manifest key
+            <a href="manifest.html#minimum_chrome_version">minimum_chrome_version</a>
+            can ensure that your extension won't be run in an earlier browser version.
+          </dd>
 
           <!-- OBJECT PROPERTIES -->
           <dd>
@@ -379,6 +397,15 @@ see the <a href="experimental.html">chrome.experimental.* APIs</a> page.
             Undocumented.
           </dd>
           <dd>The tab id for the tab to display the infobar in.</dd>
+          <dd style="display: none; ">
+            This parameter was added in version
+            <b><span></span></b>.
+            You must omit this parameter in earlier versions,
+            and you may omit it in any version.  If you require this
+            parameter, the manifest key
+            <a href="manifest.html#minimum_chrome_version">minimum_chrome_version</a>
+            can ensure that your extension won't be run in an earlier browser version.
+          </dd>
 
           <!-- OBJECT PROPERTIES -->
           <dd style="display: none; ">
@@ -422,6 +449,15 @@ see the <a href="experimental.html">chrome.experimental.* APIs</a> page.
             Undocumented.
           </dd>
           <dd>The html file that contains the infobar.</dd>
+          <dd style="display: none; ">
+            This parameter was added in version
+            <b><span></span></b>.
+            You must omit this parameter in earlier versions,
+            and you may omit it in any version.  If you require this
+            parameter, the manifest key
+            <a href="manifest.html#minimum_chrome_version">minimum_chrome_version</a>
+            can ensure that your extension won't be run in an earlier browser version.
+          </dd>
 
           <!-- OBJECT PROPERTIES -->
           <dd style="display: none; ">
@@ -471,6 +507,15 @@ see the <a href="experimental.html">chrome.experimental.* APIs</a> page.
           <dd style="display: none; ">
             Description of this parameter from the json schema.
           </dd>
+          <dd style="display: none; ">
+            This parameter was added in version
+            <b><span></span></b>.
+            You must omit this parameter in earlier versions,
+            and you may omit it in any version.  If you require this
+            parameter, the manifest key
+            <a href="manifest.html#minimum_chrome_version">minimum_chrome_version</a>
+            can ensure that your extension won't be run in an earlier browser version.
+          </dd>
 
           <!-- OBJECT PROPERTIES -->
           <dd style="display: none; ">
@@ -542,6 +587,15 @@ see the <a href="experimental.html">chrome.experimental.* APIs</a> page.
             Undocumented.
           </dd>
           <dd>Contains details about the window in which the infobar was created.</dd>
+          <dd style="display: none; ">
+            This parameter was added in version
+            <b><span></span></b>.
+            You must omit this parameter in earlier versions,
+            and you may omit it in any version.  If you require this
+            parameter, the manifest key
+            <a href="manifest.html#minimum_chrome_version">minimum_chrome_version</a>
+            can ensure that your extension won't be run in an earlier browser version.
+          </dd>
 
           <!-- OBJECT PROPERTIES -->
           <dd style="display: none; ">
@@ -558,6 +612,13 @@ see the <a href="experimental.html">chrome.experimental.* APIs</a> page.
                   </div>
                 </div>
 
+                <!-- MIN_VERSION -->
+                <p style="display: none; ">
+                  This function was added in version <b><span></span></b>.
+                  If you require this function, the manifest key
+                  <a href="manifest.html#minimum_chrome_version">minimum_chrome_version</a>
+                  can ensure that your extension won't be run in an earlier browser version.
+                </p>
               </div> <!-- /description -->
 
             </div>  <!-- /apiItem -->