Measure how often downloaded executables match the download whitelist.

chrome/browser/safe_browsing/protocol_parser.cc

Index: chrome/browser/safe_browsing/protocol_parser.cc
diff --git a/chrome/browser/safe_browsing/protocol_parser.cc b/chrome/browser/safe_browsing/protocol_parser.cc
index c6edf116dffa596233a38555a666322e18d03210..f8ab1aa75e9dc10c77f9112c0146c23e2e9e4e20 100644
--- a/chrome/browser/safe_browsing/protocol_parser.cc
+++ b/chrome/browser/safe_browsing/protocol_parser.cc
@@ -335,8 +335,9 @@ bool SafeBrowsingProtocolParser::ParseAddChunk(const std::string& list_name,
   SBEntry::Type type = hash_len == sizeof(SBPrefix) ?
       SBEntry::ADD_PREFIX : SBEntry::ADD_FULL_HASH;
 
-  if (list_name == safe_browsing_util::kBinHashList) {
-    // kBinHashList only contains prefixes, no HOSTKEY and COUNT.
+  if (list_name == safe_browsing_util::kBinHashList ||
+      list_name == safe_browsing_util::kDownloadWhiteList) {
+    // These lists only contain prefixes, no HOSTKEY and COUNT.
     DCHECK_EQ(0, remaining % hash_len);
     prefix_count = remaining / hash_len;
     SBChunkHost chunk_host;