md settings: Fix dialog buttons on lock screen.

chrome/browser/resources/settings/people_page/password_prompt_dialog.html

Index: chrome/browser/resources/settings/people_page/password_prompt_dialog.html
diff --git a/chrome/browser/resources/settings/people_page/password_prompt_dialog.html b/chrome/browser/resources/settings/people_page/password_prompt_dialog.html
index 9b4cec371a2a48ddb0c0a5c6c74722bf4bbd0577..c08d364a09365646885e5409ffaf3a089eab7d1b 100644
--- a/chrome/browser/resources/settings/people_page/password_prompt_dialog.html
+++ b/chrome/browser/resources/settings/people_page/password_prompt_dialog.html
@@ -31,18 +31,16 @@
             error-message="$i18n{passwordPromptInvalidPassword}"
             aria-disabled="false">
         </paper-input>
+      </div>
+      <div class="button-container">
+        <paper-button class="cancel-button" on-tap="onCancelTap_">
+          $i18n{cancel}
+        </paper-button>
 
-        <div class="button-strip">
-          <paper-button class="cancel-button" on-tap="onCancelTap_">
-            $i18n{cancel}
-          </paper-button>
-
-          <paper-button class="action-button" on-tap="submitPassword_"
-                        disabled$="[[!enableConfirm_(password_,
-                                                     passwordInvalid_)]]">
-            $i18n{confirm}
-          </paper-button>
-        </div>
+        <paper-button class="action-button" on-tap="submitPassword_"
+            disabled$="[[!enableConfirm_(password_, passwordInvalid_)]]">
+          $i18n{confirm}
+        </paper-button>
       </div>
     </dialog>
   </template>