make search box in settings page not get hidden behind enterprise warning

chrome/browser/resources/options2/options_page.css

 /* Copyright (c) 2012 The Chromium Authors. All rights reserved.
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file. */
 
 body {
   position: relative;
 }
 
 #main-content {
   bottom: 0;
@@ skipping 24 matching lines @@
   position: relative;
 }
 
 #page-container {
   -webkit-padding-end: 24px;
   box-sizing: border-box;
   max-width: 888px;
   min-width: 600px;
 }
 
+#page-container .page {
+  -webkit-transition-duration: 200ms;
+  -webkit-transition-property: margin-top;
+}
+
+#page-container .page.under-managed-prefs-banner {
+  margin-top: 31px;
+}
+
+#page-container header {
+  -webkit-transition-duration: 200ms;
+  -webkit-transition-property: top;
+}
+
+#page-container .page.under-managed-prefs-banner header {
+  top: 31px;
+}
+
 div.disabled {
   color: #888;
 }
 
 /* TODO(jhawkins): Refactor back into button.css once more pages are converted.
  */
 /* Note |link-button| has no additional styling for focus, hover, or active. */
 .link-button {
   color: rgb(48, 57, 66);
   padding-left: 0;
@@ skipping 233 matching lines @@
   min-width: 650px;
   padding: 0 20px;
   width: 95%;
 }
 
 .subpage-sheet-contents .page {
   z-index: 1;
 }
 
 .managed-prefs-banner {
+  -webkit-transition-duration: 200ms;
+  -webkit-transition-property: height;
   background: -webkit-linear-gradient(rgb(255, 242, 183),
                                       rgb(250, 230, 145) 97%,
                                       rgb(135, 135, 135));
   height: 31px;
   margin: 0;
   padding: 0;
-  position: relative;
+  position: fixed;
   vertical-align: middle;
   width: 100%;
-  z-index: 9;
+  z-index: 2;
+}
+
+.managed-prefs-banner[hidden] {
+  height: 0;
 }
 
 .managed-prefs-banner.clickable:active {
   background: -webkit-linear-gradient(rgb(135, 135, 135),
                                       rgb(250, 230, 145) 3%,
                                       rgb(255, 242, 183));
 }
 
 .managed-prefs-icon {
   background-image: url('chrome://theme/IDR_WARNING');
@@ skipping 426 matching lines @@
       url('chrome://theme/IDR_CONTROLLED_SETTING_RECOMMENDED_LARGE');
 }
 
 html[dir='rtl'] .controlled-setting-bubble-text {
   background-position: right top;
 }
 
 .controlled-setting-bubble-action {
   padding: 0 !important;
 }