MD WebUI: Fix minor rendering problems in <cr-toolbar>

ui/webui/resources/cr_elements/cr_toolbar/cr_toolbar_search_field.html

 <link rel="import" href="chrome://resources/html/polymer.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-spinner/paper-spinner-lite.html">
 <link rel="import" href="chrome://resources/cr_elements/cr_search_field/cr_search_field_behavior.html">
 <link rel="import" href="chrome://resources/cr_elements/icons.html">
 
 <dom-module id="cr-toolbar-search-field">
   <template>
     <style>
       :host {
@@ skipping 40 matching lines @@
         opacity: 1;
       }
 
       #prompt,
       paper-spinner-lite {
         transition: opacity 200ms;
       }
 
       /* Input field. */
       #searchTerm {
+        -webkit-font-smoothing: antialiased;
         -webkit-margin-start: 2px;
         flex: 1;
         line-height: 185%;
         position: relative;
       }
 
       label {
         bottom: 0;
         cursor: text;
         left: 0;
+        overflow: hidden;
         position: absolute;
         right: 0;
         top: 0;
+        white-space: nowrap;
       }
 
       :host([has-search-text_]) label {
         visibility: hidden;
       }
 
       input {
         -webkit-appearance: none;
         background: transparent;
         border: none;
         color: white;
-        font-family: inherit;
+        font: inherit;
         outline: none;
         padding: 0;
+        position: relative;
         width: 100%;
       }
 
       input[type='search']::-webkit-search-decoration,
       input[type='search']::-webkit-search-cancel-button,
       input[type='search']::-webkit-search-results-button {
         -webkit-appearance: none;
       }
 
       /** Wide layout. */
@@ skipping 49 matching lines @@
       </input>
     </div>
     <template is="dom-if" if="[[hasSearchText_]]">
       <paper-icon-button icon="cr:cancel" id="clearSearch"
           title="[[clearLabel]]" on-tap="clearSearch_">
       </paper-icon-button>
     </template>
   </template>
   <script src="cr_toolbar_search_field.js"></script>
 </dom-module>