[MD History] Make side bar always visible.

chrome/browser/resources/md_history/history_toolbar.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/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-spinner/paper-spinner.html">
 <link rel="import" href="chrome://resources/cr_elements/cr_search_field/cr_search_field.html">
 <link rel="import" href="chrome://history/shared_style.html">
 
 <dom-module id="history-toolbar">
   <template>
@@ skipping 19 matching lines @@
         background: rgb(68, 136, 255);
       }
 
       h1 {
         @apply(--layout-flex);
         -webkit-padding-start: 24px;
         font-size: 123%;
         font-weight: 400;
       }
 
-      #left-content,
       #right-content {
         flex: 1 0 0;
       }
 
-      :host([has-sidebar]) #left-content {
+      #left-content {
         flex: 1 0 var(--side-bar-width);
       }
 
       #centered-content {
         /** Padding-start gives space on one side, flex-basis gives space on the
           other. */
         -webkit-padding-start: var(--card-padding-side);
         display: flex;
         flex: 1 1 calc(var(--card-max-width) + var(--card-padding-side));
       }
@@ skipping 13 matching lines @@
         width: 20px;
         -webkit-padding-end: 10px;
       }
 
       #overlay-buttons {
         margin: 0 auto;
         max-width: var(--card-max-width);
         padding: 0 var(--card-padding-side);
       }
 
-      :host([has-sidebar]) #overlay-wrapper {
+      #overlay-wrapper {
         -webkit-margin-start: var(--side-bar-width);
       }
 
       #number-selected {
         @apply(--layout-flex);
       }
 
       paper-icon-button {
         -webkit-margin-end: 24px;
         -webkit-margin-start: 2px;
@@ skipping 36 matching lines @@
           </paper-button>
           <paper-button id="delete-button" on-tap="onDeleteTap_">
             $i18n{delete}
           </paper-button>
         </div>
       </div>
     </div>
   </template>
   <script src="chrome://history/history_toolbar.js"></script>
 </dom-module>