MD Settings: re-fix relative paper-input-label font-size.

chrome/browser/resources/settings/passwords_and_forms_page/address_edit_dialog.html

 <link rel="import" href="chrome://resources/cr_elements/cr_dialog/cr_dialog.html">
 <link rel="import" href="chrome://resources/html/cr.html">
 <link rel="import" href="chrome://resources/html/i18n_behavior.html">
 <link rel="import" href="chrome://resources/html/md_select_css.html">
 <link rel="import" href="chrome://resources/html/polymer.html">
 <link rel="import" href="chrome://resources/polymer/v1_0/iron-a11y-keys/iron-a11y-keys.html">
 <link rel="import" href="chrome://resources/polymer/v1_0/paper-input/paper-input.html">
 <link rel="import" href="chrome://resources/polymer/v1_0/paper-input/paper-textarea.html">
 <link rel="import" href="../settings_shared_css.html">
 <link rel="import" href="../settings_vars_css.html">
@@ skipping 14 matching lines @@
       .md-select.address-column {
         -webkit-margin-end: 0;
         margin-bottom: 0;
       }
 
       #select-row {
         display: block;
       }
 
       #select-label {
-       color: var(--light-theme-secondary-color);
-       font-size: 12px
+        /* Mimic other paper-input floating labels. */
+        -webkit-transform: scale(0.75);
+        color: var(--light-theme-secondary-color);
+        transform: scale(0.75);
+        transform-origin: left;
+        width: 133%;
+        @apply(--paper-input-container-label-floating);
       }
 
       .long {
         width: var(--paper-input-max-width);
       }
 
       #saveButton {
         -webkit-margin-start: 8px;
       }
 
@@ skipping 68 matching lines @@
         </paper-button>
         <paper-button id="saveButton" class="action-button"
             disabled="[[!canSave_]]" on-tap="onSaveButtonTap_">
           $i18n{save}
         </paper-button>
       </div>
     </dialog>
   </template>
   <script src="address_edit_dialog.js"></script>
 </dom-module>