Add sampling of unknown filetypes in download protection.

chrome/browser/safe_browsing/incident_reporting/last_download_finder.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 "chrome/browser/safe_browsing/incident_reporting/last_download_finder.h"
 
 #include <stddef.h>
 #include <stdint.h>
 
 #include <algorithm>
@@ skipping 41 matching lines @@
 int64_t GetEndTime(const ClientIncidentReport_DownloadDetails& details) {
   return details.download_time_msec();
 }
 
 bool IsBinaryDownloadForCurrentOS(
     ClientDownloadRequest::DownloadType download_type) {
   // Whenever a new DownloadType is introduced, the following set of conditions
   // should also be updated so that the IsBinaryDownloadForCurrentOS() will
   // return true for that DownloadType as appropriate.
   static_assert(ClientDownloadRequest::DownloadType_MAX ==
-                    ClientDownloadRequest::PPAPI_SAVE_REQUEST,
+                    ClientDownloadRequest::SAMPLED_UNSUPPORTED_FILE,
                 "Update logic below");
 
 // Platform-specific types are relevant only for their own platforms.
 #if defined(OS_MACOSX)
   if (download_type == ClientDownloadRequest::MAC_EXECUTABLE ||
       download_type == ClientDownloadRequest::INVALID_MAC_ARCHIVE)
     return true;
 #elif defined(OS_ANDROID)
   if (download_type == ClientDownloadRequest::ANDROID_APK)
     return true;
@@ skipping 372 matching lines @@
     }
   }
 }
 
 void LastDownloadFinder::HistoryServiceBeingDeleted(
     history::HistoryService* history_service) {
   history_service_observer_.Remove(history_service);
 }
 
 }  // namespace safe_browsing