[Downloads] Rework how hashes are calculated for download files.

chrome/browser/download/download_item_model.cc

Index: chrome/browser/download/download_item_model.cc
diff --git a/chrome/browser/download/download_item_model.cc b/chrome/browser/download/download_item_model.cc
index 46694aecc071080a58a14fa941cb273d2aaf1cca..049a3b00bf76c733c96e03e8a75a57224a1dbadd 100644
--- a/chrome/browser/download/download_item_model.cc
+++ b/chrome/browser/download/download_item_model.cc
@@ -179,6 +179,7 @@ base::string16 InterruptReasonStatusMessage(
       // fallthrough
     case content::DOWNLOAD_INTERRUPT_REASON_SERVER_NO_RANGE:
     case content::DOWNLOAD_INTERRUPT_REASON_FILE_FAILED:
+    case content::DOWNLOAD_INTERRUPT_REASON_FILE_HASH_MISMATCH:
       string_id = IDS_DOWNLOAD_INTERRUPTED_STATUS;
   }
 
@@ -262,6 +263,7 @@ base::string16 InterruptReasonMessage(content::DownloadInterruptReason reason) {
       // fallthrough
     case content::DOWNLOAD_INTERRUPT_REASON_SERVER_NO_RANGE:
     case content::DOWNLOAD_INTERRUPT_REASON_FILE_FAILED:
+    case content::DOWNLOAD_INTERRUPT_REASON_FILE_HASH_MISMATCH:
       string_id = IDS_DOWNLOAD_INTERRUPTED_STATUS;
   }