MD Settings: Replace paper-item with button under iron-dropdown, part1.

chrome/browser/resources/settings/certificate_manager_page/certificate_subentry.html

Index: chrome/browser/resources/settings/certificate_manager_page/certificate_subentry.html
diff --git a/chrome/browser/resources/settings/certificate_manager_page/certificate_subentry.html b/chrome/browser/resources/settings/certificate_manager_page/certificate_subentry.html
index 7ac2346c0b052aef245b1ecf01269e4c33a602a6..8325fb23c05ce4a9685af2cfce543edef7d2e124 100644
--- a/chrome/browser/resources/settings/certificate_manager_page/certificate_subentry.html
+++ b/chrome/browser/resources/settings/certificate_manager_page/certificate_subentry.html
@@ -2,7 +2,6 @@
 <link rel="import" href="chrome://resources/cr_elements/icons.html">
 <link rel="import" href="chrome://resources/polymer/v1_0/iron-dropdown/iron-dropdown.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-item/paper-item.html">
 <link rel="import" href="/certificate_manager_page/certificate_manager_types.html">
 <link rel="import" href="/certificate_manager_page/certificates_browser_proxy.html">
 <link rel="import" href="/settings_shared_css.html">
@@ -28,10 +27,6 @@
         text-transform: uppercase;
       }
 
-      paper-item:hover {
-        background-color: var(--settings-hover-color);
-      }
-
       :host([is-last]) .list-item {
         border-bottom: none;
       }
@@ -48,22 +43,24 @@
         <iron-dropdown vertical-align="auto" horizontal-align="right"
             opened="{{menuOpened}}">
           <div class="dropdown-content">
-            <paper-item id="view" on-tap="onViewTap_">
+            <button class="dropdown-item" role="option" id="view"
+                on-tap="onViewTap_">
               $i18n{certificateManagerView}
-            </paper-item>
-            <paper-item id="edit" hidden$="[[!canEdit_(certificateType, model)]]"
+            </button>
+            <button class="dropdown-item" role="option" id="edit"
+                hidden$="[[!canEdit_(certificateType, model)]]"
                 on-tap="onEditTap_">
               $i18n{certificateManagerEdit}
-            </paper-item>
-            <paper-item id="export"
+            </button>
+            <button class="dropdown-item" role="option" id="export"
                 hidden$="[[!canExport_(certificateType, model)]]"
                 on-tap="onExportTap_">
               $i18n{certificateManagerExport}
-            </paper-item>
-            <paper-item id="delete" hidden$="[[!canDelete_(model)]]"
-                on-tap="onDeleteTap_">
+            </button>
+            <button class="dropdown-item" role="option" id="delete"
+                hidden$="[[!canDelete_(model)]]" on-tap="onDeleteTap_">
               $i18n{certificateManagerDelete}
-            </paper-item>
+            </button>
           </div>
         </iron-dropdown>
       </template>