[SafeBrowsing] Send pings for Zip files that contain other archives.

chrome/common/safe_browsing/csd.proto

 // Copyright (c) 2012 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.
 //
 // Client side phishing and malware detection request and response
 // protocol buffers.  Those protocol messages should be kept in sync
 // with the server implementation.
 //
 // If you want to change this protocol definition or you have questions
 // regarding its format please contact chrome-anti-phishing@googlegroups.com.
@@ skipping 227 matching lines @@
   optional string file_basename = 9;
 
   // Starting with Chrome M19 we're also sending back pings for Chrome
   // extensions that get downloaded by users.
   enum DownloadType {
     WIN_EXECUTABLE = 0;    // Currently all .exe, .cab and .msi files.
     CHROME_EXTENSION = 1;  // .crx files.
     ANDROID_APK = 2;       // .apk files.
     // .zip files containing one of the other executable types.
     ZIPPED_EXECUTABLE = 3;
-    MAC_EXECUTABLE = 4;    // .dmg, .pkg, etc.
+    MAC_EXECUTABLE = 4;  // .dmg, .pkg, etc.
+    ZIPPED_ARCHIVE = 5;  // .zip file containing another archive.

[palmer, 2015/07/31 22:48:18]

|NESTED_ARCHIVE| is more explanatory, IMO.

[asanka, 2015/08/02 03:43:32]

We are currently looking just at zip files, but I concede that even then
|NESTED_ARCHIVE| would've been a better name. I'm going to leave it as is
because it reflects the meanings and names used internally by the SafeBrowsing
service. However, in the future we should consider generalizing these to make
them less .zip specific.

   }
   optional DownloadType download_type = 10 [default = WIN_EXECUTABLE];
 
   // Locale of the device, eg en, en_US.
   optional string locale = 11;
 
   message PEImageHeaders {
     // IMAGE_DOS_HEADER.
     optional bytes dos_header = 1;
     // IMAGE_FILE_HEADER.
@@ skipping 286 matching lines @@
   message EnvironmentRequest { optional int32 dll_index = 1; }
 
   repeated EnvironmentRequest environment_requests = 3;
 }
 
 message DownloadMetadata {
   optional uint32 download_id = 1;
 
   optional ClientIncidentReport.DownloadDetails download = 2;
 }