Language settings: tweak Custom Spelling page

chrome/browser/resources/settings/languages_page/edit_dictionary_page.html

 <link rel="import" href="chrome://resources/cr_elements/icons.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/iron-list/iron-list.html">
 <link rel="import" href="chrome://resources/polymer/v1_0/paper-button/paper-button.html">
 <link rel="import" href="chrome://resources/polymer/v1_0/paper-icon-button/paper-icon-button.html">
 <link rel="import" href="chrome://resources/polymer/v1_0/paper-input/paper-input.html">
 <link rel="import" href="/settings_shared_css.html">
 
 <dom-module id="settings-edit-dictionary-page">
   <template>
     <style include="settings-shared">
       :host {
         display: flex;
         flex-direction: column;
       }
 
       #newWord {
-        flex: .5;
+        width: var(--paper-input-max-width);
+        --paper-input-container-label: {
+          font-size: inherit;
+        };
       }
 
       iron-list {
         /* TODO(michaelpg): Size to fit the viewport. */
         height: 300px;
       }
 
       iron-list .word {
         flex: 1;
         overflow: hidden;
         text-overflow: ellipsis;
         white-space: nowrap;
       }
 
       paper-button {
         -webkit-margin-start: 16px;
       }
     </style>
     <div class="settings-box">
       <iron-a11y-keys id="keys" keys="enter esc"
           on-keys-pressed="onKeysPress_"></iron-a11y-keys>
-      <paper-input id="newWord" no-label-float
-          label="$i18n{addDictionaryWordLabel}"></paper-input>
+      <div class="start">
+        <paper-input id="newWord" no-label-float
+            label="$i18n{addDictionaryWordLabel}"></paper-input>
+      </div>
       <paper-button on-tap="onAddWordTap_">
         $i18n{addDictionaryWordButton}
       </paper-button>
     </div>
     <div class="settings-box block">
       <h2>$i18n{customDictionaryWords}</h2>
       <div class="list-frame">
         <iron-list id="list" items="{{words_}}">
           <template>
             <div class="list-item">
               <div class="word">[[item]]</div>
               <paper-icon-button icon="cr:clear" on-tap="onRemoveWordTap_">
               </paper-icon-button>
             </div>
           </template>
         </iron-list>
       </div>
     </div>
   </template>
   <script src="edit_dictionary_page.js"></script>
 </dom-module>