Remove the 'url' type from the add startup page overlay

This was accidentally re-added during a bad merge; having the type causes the new built-in validation to be activated, and it's stricter than we want to be.

BUG=None
TEST=Enter a domain without a scheme in the add page overlay field; there shouldn't be any validation UI

Review URL: http://codereview.chromium.org/6352020

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@72674 0039d316-1c4b-4281-b951-d872f2087c98

chrome/browser/resources/options/add_startup_page_overlay.html

@@ -4,7 +4,7 @@
     <div class="content-area">
       <label id="addURLBlock"><span
           i18n-content="addStartupPageURLLabel"></span>
-        <input type="url" id="addStartupPageURL"></label>
+        <input id="addStartupPageURL"></label>
       <list id="addStartupRecentPageList"></list>
     </div>
     <div class="action-area">