[dashboard] Use "dialog-dismiss" and "dialog-confirm" w/ paper-dialogs

dashboard/dashboard/elements/bisect-form.html

Index: dashboard/dashboard/elements/bisect-form.html
diff --git a/dashboard/dashboard/elements/bisect-form.html b/dashboard/dashboard/elements/bisect-form.html
index 49c0b012e41ea9c5e02077e234f48a6677cc3a3d..6db952768bc6b290a84ceb86477faab37cfcc3ba 100644
--- a/dashboard/dashboard/elements/bisect-form.html
+++ b/dashboard/dashboard/elements/bisect-form.html
@@ -46,7 +46,7 @@ the bisect process after the user clicks on the bisect button.
           padding: 1px 2px;
         }
 
-        paper-button[affirmative] {
+        paper-button[dialog-confirm] {
           background: #4285f4;
           color: #fff;
         }
@@ -138,9 +138,9 @@ the bisect process after the user clicks on the bisect button.
 
       <p class="error">{{error}}</p>
 
-      <paper-button affirmative raised autofocus disabled$="{{error}}"
+      <paper-button dialog-confirm raised autofocus disabled$="{{error}}"
                     on-click="onSendToTrybot">Start bisect</paper-button>
-      <paper-button dismissive raised>Close</paper-button>
+      <paper-button dialog-dismiss raised>Close</paper-button>
 
       <template is="dom-if" if="{{loading}}">
         <div id="loading">