DevTools: [Documentation] fix css styles for renderer

Source/devtools/front_end/documentationView.css

 /*
  * Copyright 2014 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.
  */
 
-.documentation-example-code {
-    border: 1px dotted black;
-    border-radius: 6px;
-    padding: 10px;
-    margin-bottom: 10px;
-}
-
 .documentation-code {
     border: 1px dotted black;
     border-radius: 6px;
     padding: 10px;
     margin-bottom: 10px;
 }
 
 .documentation-section-title {
     font-size: 120%;
     padding-bottom: 4px;
@@ skipping 14 matching lines @@
 
 .documentation-section {
     margin-bottom: 15px;
 }
 
 .documentation-code-tag {
     font-weight: bold;
 }
 
 .documentation-parameter-optional {
-    padding: 6px;
     background-color: rgb(219, 234, 249);
-    text-decoration: none;
-    margin-left: 10px;
-    margin-top: -5px;
-    border-radius: 5px;
 }
 
 .documentation-parameter-data-type-value {
-    margin-right: 5px;
-    padding: 6px;
     background-color: rgb(254, 254, 202);
-    text-decoration: none;
-    margin-left: 10px;
-    margin-top: 5px;
-    border-radius: 5px;
 }
 
 .documentation-parameter-name {
     font-size: 120%;
     font-style: italic;
 }
 
 .documentation-page-title {
     font-size: 160%;
     font-weight: bold;
     padding-bottom: 7px;
 }
 
 .documentation-view {
     -webkit-user-select: text;
     padding: 10px;
 }
 
 .documentation-example-description-section {
     margin-bottom: 10px;
 }
 
 .documentation-example-link {
     float: right;
+}
+
+.documentation-box {
     padding: 6px;
-    background-color: rgb(241, 246, 251);
     text-decoration: none;
     margin-left: 10px;
     margin-top: 5px;
     border-radius: 5px;
-}
+}