Adds SB V4 response handler to Protocol Manager.

components/safe_browsing_db/util.h

 // Copyright (c) 2015 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.
 //
 // Utilities for the SafeBrowsing DB code.
 
 #ifndef COMPONENTS_SAFE_BROWSING_DB_UTIL_H_
 #define COMPONENTS_SAFE_BROWSING_DB_UTIL_H_
 
 #include <cstring>
@@ skipping 46 matching lines @@
   char full_hash[32];
   SBPrefix prefix;
 };
 
 // Used when we get a gethash response.
 struct SBFullHashResult {
   SBFullHash hash;
   // TODO(shess): Refactor to allow ListType here.
   int list_id;
   std::string metadata;
+  // Used only for V4 results. The cache lifetime for this result. The response
+  // must not be cached for more than this duration to avoid false positives.
+  base::TimeDelta cache_duration;
 };
 
 // Caches individual response from GETHASH request.
 struct SBCachedFullHashResult {
   SBCachedFullHashResult();
   explicit SBCachedFullHashResult(const base::Time& in_expire_after);
   ~SBCachedFullHashResult();
 
   base::Time expire_after;
   std::vector<SBFullHashResult> full_hashes;
@@ skipping 87 matching lines @@
 
 // Given a URL, returns all the paths we need to check.
 void GeneratePathsToCheck(const GURL& url, std::vector<std::string>* paths);
 
 // Given a URL, returns all the patterns we need to check.
 void GeneratePatternsToCheck(const GURL& url, std::vector<std::string>* urls);
 
 }  // namespace safe_browsing
 
 #endif  // COMPONENTS_SAFE_BROWSING_DB_UTIL_H_