add a download slices table into history download db

chrome/browser/safe_browsing/incident_reporting/last_download_finder_unittest.cc

Index: chrome/browser/safe_browsing/incident_reporting/last_download_finder_unittest.cc
diff --git a/chrome/browser/safe_browsing/incident_reporting/last_download_finder_unittest.cc b/chrome/browser/safe_browsing/incident_reporting/last_download_finder_unittest.cc
index 49b194f15e0f807e297c664b8e0531de3db65b64..1c140dff4d74df1f326a3526ccc2fdd24db2f85a 100644
--- a/chrome/browser/safe_browsing/incident_reporting/last_download_finder_unittest.cc
+++ b/chrome/browser/safe_browsing/incident_reporting/last_download_finder_unittest.cc
@@ -295,7 +295,8 @@ class LastDownloadFinderTest : public testing::Test {
         base::GenerateGUID(),                          // GUID
         false,                                         // download_opened
         std::string(),                                 // ext_id
-        std::string());                                // ext_name
+        std::string(),                                 // ext_name
+        std::vector<history::DownloadSliceInfo>());    // download_slice_info
   }
 
   content::TestBrowserThreadBundle browser_thread_bundle_;