MD Settings: create a global "action button" style (blue, flat)

chrome/browser/resources/settings/settings_dialog_css.html

Index: chrome/browser/resources/settings/settings_dialog_css.html
diff --git a/chrome/browser/resources/settings/settings_dialog_css.html b/chrome/browser/resources/settings/settings_dialog_css.html
index 5c34203c5c2a593d12bcc90fa548bd4cc6e07e02..4f61bc5d0d9bc0d446e3a046c5546a343ff0da15 100644
--- a/chrome/browser/resources/settings/settings_dialog_css.html
+++ b/chrome/browser/resources/settings/settings_dialog_css.html
@@ -46,16 +46,6 @@
         -webkit-padding-start: 24px;
       }
 
-      paper-dialog .action-button {
-        -webkit-margin-start: 10px;
-        font-weight: 500;
-      }
-
-      paper-dialog .action-button:not([disabled]) {
-        background-color: rgb(66, 133, 244);
-        color: white;
-      }
-
       paper-dialog .cancel-button {
         color: rgb(109, 109, 109);
         font-weight: 500;