Sync csd.proto with server-side version.

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 177 matching lines @@
   enum Verdict {
     // Download is considered safe.
     SAFE = 0;
     // Download is considered dangerous.  Chrome should show a warning to the
     // user.
     DANGEROUS = 1;
     // Download is unknown.  Chrome should display a less severe warning.
     UNCOMMON = 2;
     // The download is potentially unwanted.
     POTENTIALLY_UNWANTED = 3;
+    // The download is from a dangerous host.
+    DANGEROUS_HOST = 4;
   }
   required Verdict verdict = 1;
 
   message MoreInfo {
     // A human-readable string describing the nature of the warning.
     // Only if verdict != SAFE. Localized based on request.locale.
     optional string description = 1;
 
     // A URL to get more information about this warning, if available.
     optional string url = 2;
@@ skipping 27 matching lines @@
 
   // Stores the information of the user who provided the feedback.
   optional UserInformation user_information = 3;
 
   // Unstructed comments provided by the user.
   optional bytes comment = 4;
 
   // The original download response sent from the verdict server.
   optional ClientDownloadResponse download_response = 5;
 }