Fix font sizes on Site Details page.

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

 <link rel="import" href="chrome://resources/html/polymer.html">
 <link rel="import" href="chrome://resources/polymer/v1_0/iron-flex-layout/iron-flex-layout.html">
 <link rel="import" href="chrome://resources/polymer/v1_0/iron-icon/iron-icon.html">
 <link rel="import" href="chrome://resources/polymer/v1_0/paper-dropdown-menu/paper-dropdown-menu.html">
 <link rel="import" href="chrome://resources/polymer/v1_0/paper-item/paper-item.html">
 <link rel="import" href="chrome://resources/polymer/v1_0/paper-listbox/paper-listbox.html">
 <link rel="import" href="chrome://resources/html/web_ui_listener_behavior.html">
 <link rel="import" href="/i18n_setup.html">
 <link rel="import" href="/settings_shared_css.html">
 <link rel="import" href="/site_settings/constants.html">
 <link rel="import" href="/site_settings/site_settings_behavior.html">
 <link rel="import" href="/site_settings/site_settings_prefs_browser_proxy.html">
 
 <dom-module id="site-details-permission">
   <template>
     <style include="settings-shared">
       :host {
         display: block;
       }
 
+      paper-dropdown-menu {
+        --paper-input-container-input: {
+          font-size: inherit;
+        };
+
+        --paper-font-caption: {
+          font-size: inherit;
+        }
+      }
+
       .left-column {
         -webkit-margin-start: 15px;
       }
 
       .right-column {
         -webkit-margin-start: 10px;
       }
 
       .permission-header {
         -webkit-margin-start: -1px;
@@ skipping 39 matching lines @@
                  [[i18n_.blockAction]]
               </paper-item>
             </paper-listbox>
           </paper-dropdown-menu>
         </div>
       </div>
     </div>
   </template>
   <script src="site_details_permission.js"></script>
 </dom-module>