[MD settings] moving dialog css to shared to use in OnStartup and Reset settings

chrome/browser/resources/settings/reset_page/reset_page_dialog.css

Index: chrome/browser/resources/settings/reset_page/reset_page_dialog.css
diff --git a/chrome/browser/resources/settings/reset_page/reset_page_dialog.css b/chrome/browser/resources/settings/reset_page/reset_page_dialog.css
index 9bdac00e3c638faad82dbaa116134c3128b2e6fd..43afe64d8d9acda58732fa8768bf43ff60badd1c 100644
--- a/chrome/browser/resources/settings/reset_page/reset_page_dialog.css
+++ b/chrome/browser/resources/settings/reset_page/reset_page_dialog.css
@@ -2,48 +2,6 @@
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file. */
 
-#dialog-content {
-  -webkit-padding-end: 0;
-  -webkit-padding-start: 0;
-  margin-top: 0;
-}
-
-.dialog-top-row {
-  align-items: center;
-  border-bottom: 1px solid gainsboro;
-  display: flex;
-  padding-bottom: 5px;
-  padding-top: 5px;
-}
-
-.dialog-title {
-  flex: 1;
-  font-size: 1.13em;
-}
-
-.dialog-body {
-  font-size: 1em;
-  margin: 20px 0;
-}
-
-.dialog-title,
-.dialog-body {
-  -webkit-padding-end: 24px;
-  -webkit-padding-start: 24px;
-}
-
-.action-button {
-  -webkit-margin-start: 10px;
-  background-color: rgb(66, 133, 244);
-  color: white;
-  font-weight: 500;
-}
-
-.cancel-button {
-  color: rgb(109, 109, 109);
-  font-weight: 500;
-}
-
 paper-button {
   margin: 0;
 }
@@ -52,13 +10,3 @@ a {
   color: rgb(66, 133, 244);
   text-decoration: none;
 }
-
-.explanation {
-  margin-bottom: 35px;
-}
-
-.button-container {
-  display: flex;
-  flex: 1;
-  justify-content: flex-end;
-}