Parse the download server response.

chrome/common/safe_browsing/csd.proto

 // Copyright (c) 2011 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 128 matching lines @@
     // The full DER-encoded X.509 certificate extracted from the binary.
     optional bytes certificate_contents = 4;
   }
 
   // This field will only be set if the binary is signed.
   optional SignatureInfo signature = 5;
 
   // True if the download was user initiated.
   optional bool user_initiated = 6;
 }
+
+message ClientDownloadResponse {
+  enum Verdict {
+    // Download is considered safe.
+    SAFE = 0;
+    // Download is considered dangerous.  Chrome should show a warning to the
+    // user.
+    DANGEROUS = 1;
+  }
+  required Verdict verdict = 1;
+}