Move settings_dropdown_menu styling to settings_shared_css.

chrome/browser/resources/settings/site_settings/site_details_permission.html

Index: chrome/browser/resources/settings/site_settings/site_details_permission.html
diff --git a/chrome/browser/resources/settings/site_settings/site_details_permission.html b/chrome/browser/resources/settings/site_settings/site_details_permission.html
index 42c7b56a7428464a9015c2d9a6fc0f565ae53003..ac6a4b78c7e6ad7c3edfa62fe29d34ed94c9d5c1 100644
--- a/chrome/browser/resources/settings/site_settings/site_details_permission.html
+++ b/chrome/browser/resources/settings/site_settings/site_details_permission.html
@@ -18,16 +18,6 @@
         display: block;
       }
 
-      paper-dropdown-menu {
-        --paper-input-container-input: {
-          font-size: inherit;
-        };
-
-        --paper-font-caption: {
-          font-size: inherit;
-        }
-      }
-
       .left-column {
         -webkit-margin-start: 15px;
       }
@@ -71,14 +61,14 @@
             <paper-listbox id="permission" class="dropdown-content"
                 on-iron-activate="onPermissionMenuIronActivate_"
                 attr-for-selected="data-permission-value">
-              <paper-item id="allow"
+              <div id="allow" class="dropdown-item"

[dpapad, 2016/07/07 21:03:55]

Same here and below, role="option"

[stevenjb, 2016/07/07 21:39:06]

Done.

                   data-permission-value$="[[PermissionValues.ALLOW]]">
                 [[i18n_.allowAction]]
-              </paper-item>
-              <paper-item id="block"
+              </div>
+              <div id="block" class="dropdown-item"
                   data-permission-value$="[[PermissionValues.BLOCK]]">
                  [[i18n_.blockAction]]
-              </paper-item>
+              </div>
             </paper-listbox>
           </paper-dropdown-menu>
         </div>