Read and restore persisted slice info

chrome/browser/ntp_snippets/fake_download_item.cc

Index: chrome/browser/ntp_snippets/fake_download_item.cc
diff --git a/chrome/browser/ntp_snippets/fake_download_item.cc b/chrome/browser/ntp_snippets/fake_download_item.cc
index ef06a2849547ffc6e313fe6473858a67a4737cf4..2f2db42ae4ebdc0cd0ce393e18b05dbf26458734 100644
--- a/chrome/browser/ntp_snippets/fake_download_item.cc
+++ b/chrome/browser/ntp_snippets/fake_download_item.cc
@@ -326,6 +326,13 @@ int64_t FakeDownloadItem::GetReceivedBytes() const {
   return 1;
 }
 
+const std::vector<DownloadItem::ReceivedSlice>&
+FakeDownloadItem::GetReceivedSlices() const {
+  NOTREACHED();
+  static const std::vector<DownloadItem::ReceivedSlice> slices;
+  return slices;
+}
+
 bool FakeDownloadItem::CanShowInFolder() {
   NOTREACHED();
   return true;