Sync csd.proto with server-side version.

content/public/browser/download_danger_type.h

Index: content/public/browser/download_danger_type.h
diff --git a/content/public/browser/download_danger_type.h b/content/public/browser/download_danger_type.h
index 046bc78fc34f1af8e8d51c09b4455f167d66796f..fbd7aef591d7e3e531d230105e7bed440783461f 100644
--- a/content/public/browser/download_danger_type.h
+++ b/content/public/browser/download_danger_type.h
@@ -32,10 +32,15 @@ enum DownloadDangerType {
   // didn't have enough data to determine whether it was malicious.
   DOWNLOAD_DANGER_TYPE_UNCOMMON_CONTENT,
 
-  // The download was evaluated to be one of the above types of danger,
+  // The download was evaluated to be one of the other types of danger,
   // but the user told us to go ahead anyway.
   DOWNLOAD_DANGER_TYPE_USER_VALIDATED,
 
+  // SafeBrowsing download service checked the contents of the download and
+  // didn't have data on this specific file, but the file was served from a host
+  // known to serve mostly malicious content.
+  DOWNLOAD_DANGER_TYPE_DANGEROUS_HOST,
+
   // Memory space for histograms is determined by the max.
   // ALWAYS ADD NEW VALUES BEFORE THIS ONE.
   DOWNLOAD_DANGER_TYPE_MAX