Add timestamp support to the Previews infobar

components/infobars/core/infobar_delegate.cc

 // Copyright 2014 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "components/infobars/core/infobar_delegate.h"
 
 #include "base/logging.h"
 #include "build/build_config.h"
 #include "components/infobars/core/infobar.h"
 #include "components/infobars/core/infobar_manager.h"
@@ skipping 83 matching lines @@
 }
 
 PermissionInfoBarDelegate* InfoBarDelegate::AsPermissionInfoBarDelegate() {
   return nullptr;
 }
 
 PopupBlockedInfoBarDelegate* InfoBarDelegate::AsPopupBlockedInfoBarDelegate() {
   return nullptr;
 }
 
+PreviewsInfoBarDelegate* InfoBarDelegate::AsPreviewsInfoBarDelegate() {
+  return nullptr;
+}
+
 RegisterProtocolHandlerInfoBarDelegate*
     InfoBarDelegate::AsRegisterProtocolHandlerInfoBarDelegate() {
   return nullptr;
 }
 
 ScreenCaptureInfoBarDelegate*
     InfoBarDelegate::AsScreenCaptureInfoBarDelegate() {
   return nullptr;
 }
 
@@ skipping 20 matching lines @@
 offline_pages::OfflinePageInfoBarDelegate*
 InfoBarDelegate::AsOfflinePageInfoBarDelegate() {
   return nullptr;
 }
 #endif
 
 InfoBarDelegate::InfoBarDelegate() : nav_entry_id_(0) {
 }
 
 }  // namespace infobars