Enable MD storage manager by default.

chrome/browser/resources/settings/device_page/device_page.html

 <link rel="import" href="chrome://resources/html/i18n_behavior.html">
 <link rel="import" href="chrome://resources/html/polymer.html">
 <link rel="import" href="chrome://resources/html/web_ui_listener_behavior.html">
 <link rel="import" href="chrome://resources/polymer/v1_0/iron-icon/iron-icon.html">
 <link rel="import" href="chrome://resources/polymer/v1_0/neon-animation/neon-animatable.html">
 <link rel="import" href="chrome://resources/polymer/v1_0/paper-icon-button/paper-icon-button-light.html">
 <link rel="import" href="/device_page/device_page_browser_proxy.html">
 <link rel="import" href="/device_page/display.html">
 <link rel="import" href="/device_page/keyboard.html">
 <link rel="import" href="/device_page/pointers.html">
@@ skipping 33 matching lines @@
             <div class="middle">$i18n{stylusTitle}</div>
           <button class="subpage-arrow" is="paper-icon-button-light"></button>
           </div>
         </template>
         <div id="displayRow" class="settings-box" on-tap="onDisplayTap_"
             actionable>
           <iron-icon icon="settings:desktop-windows"></iron-icon>
           <div class="middle">$i18n{displayTitle}</div>
           <button class="subpage-arrow" is="paper-icon-button-light"></button>
         </div>
-        <template is="dom-if" if="[[showStorageManager_]]">
-          <div id="storageRow" class="settings-box" on-tap="onStorageTap_"
-              actionable>
-            <iron-icon icon="settings:storage"></iron-icon>
-            <div class="middle">$i18n{storageTitle}</div>
-            <button class="subpage-arrow" is="paper-icon-button-light"></button>
-          </div>
-        </template>
+        <div id="storageRow" class="settings-box" on-tap="onStorageTap_"
+            actionable>
+          <iron-icon icon="settings:storage"></iron-icon>
+          <div class="middle">$i18n{storageTitle}</div>
+          <button class="subpage-arrow" is="paper-icon-button-light"></button>
+        </div>
       </neon-animatable>
       <template is="dom-if" route-path="/pointer-overlay">
         <settings-subpage
             associated-control="[[$$('#pointersRow')]]"
             page-title="[[getPointersTitle_(hasMouse_, hasTouchpad_)]]">
           <settings-pointers prefs="{{prefs}}"
               has-mouse="[[hasMouse_]]" has-touchpad="[[hasTouchpad_]]">
           </settings-pointers>
         </settings-subpage>
       </template>
@@ skipping 13 matching lines @@
           </settings-subpage>
         </template>
       </template>
       <template is="dom-if" route-path="/display">
         <settings-subpage
             associated-control="[[$$('#displayRow')]]"
             page-title="$i18n{displayTitle}">
           <settings-display></settings-display>
         </settings-subpage>
       </template>
-      <template is="dom-if" if="[[showStorageManager_]]">
-        <template is="dom-if" route-path="/storage">
-          <settings-subpage
-              associated-control="[[$$('#storageRow')]]"
-              page-title="$i18n{storageTitle}">
-            <settings-storage></settings-storage>
-          </settings-subpage>
-        </template>
+      <template is="dom-if" route-path="/storage">
+        <settings-subpage
+            associated-control="[[$$('#storageRow')]]"
+            page-title="$i18n{storageTitle}">
+          <settings-storage></settings-storage>
+        </settings-subpage>
       </template>
     </settings-animated-pages>
   </template>
   <script src="device_page.js"></script>
 </dom-module>