Validate that zip entry filenames are UTF8.

chrome/browser/safe_browsing/download_protection_service.cc

Index: chrome/browser/safe_browsing/download_protection_service.cc
diff --git a/chrome/browser/safe_browsing/download_protection_service.cc b/chrome/browser/safe_browsing/download_protection_service.cc
index ba2592be3c90b04e8d8615780447a0b9a8737ab8..6939ca0290ca949586ec41e7d4791904f2f57d1d 100644
--- a/chrome/browser/safe_browsing/download_protection_service.cc
+++ b/chrome/browser/safe_browsing/download_protection_service.cc
@@ -590,7 +590,10 @@ class DownloadProtectionService::CheckClientDownloadRequest
       archived_binary_.CopyFrom(results.archived_binary);
       DVLOG(1) << "Zip analysis finished for " << item_->GetFullPath().value()
                << ", has_executable=" << results.has_executable
-               << " has_archive=" << results.has_archive;
+               << " has_archive=" << results.has_archive
+               << " has_unsafe_file=" << results.has_unsafe_file;
+      UMA_HISTOGRAM_BOOLEAN("SBClientDownload.ZipFileHasUnsafeFile",
+                            results.has_unsafe_file);
     } else {
       DVLOG(1) << "Zip analysis failed for " << item_->GetFullPath().value();
     }