Check that all the hashes ids in the model are valid.

chrome/browser/safe_browsing/client_side_detection_service.h

Index: chrome/browser/safe_browsing/client_side_detection_service.h
diff --git a/chrome/browser/safe_browsing/client_side_detection_service.h b/chrome/browser/safe_browsing/client_side_detection_service.h
index ee182d724d06a6c07c2f0121ac4e14f2a97f34c2..864ab7677b06913e1c11b79cfebd5b5f8c2f46f4 100644
--- a/chrome/browser/safe_browsing/client_side_detection_service.h
+++ b/chrome/browser/safe_browsing/client_side_detection_service.h
@@ -130,6 +130,7 @@ class ClientSideDetectionService : public URLFetcher::Delegate,
     MODEL_PARSE_ERROR,
     MODEL_MISSING_FIELDS,
     MODEL_INVALID_VERSION_NUMBER,
+    MODEL_BAD_HASH_IDS,
     MODEL_STATUS_MAX  // Always add new values before this one.
   };
 
@@ -148,6 +149,8 @@ class ClientSideDetectionService : public URLFetcher::Delegate,
   FRIEND_TEST_ALL_PREFIXES(ClientSideDetectionServiceTest, FetchModelTest);
   FRIEND_TEST_ALL_PREFIXES(ClientSideDetectionServiceTest, SetBadSubnets);
   FRIEND_TEST_ALL_PREFIXES(ClientSideDetectionServiceTest, IsBadIpAddress);
+  FRIEND_TEST_ALL_PREFIXES(ClientSideDetectionServiceTest,
+                           ModelHasValidHashIds);
 
   // CacheState holds all information necessary to respond to a caller without
   // actually making a HTTP request.
@@ -224,6 +227,11 @@ class ClientSideDetectionService : public URLFetcher::Delegate,
   static void SetBadSubnets(const ClientSideModel& model,
                             BadSubnetMap* bad_subnets);
 
+
+  // Returns true iff all the hash id's in the client-side model point to
+  // valid hashes in the model.
+  static bool ModelHasValidHashIds(const ClientSideModel& model);
+
   std::string model_str_;
   scoped_ptr<ClientSideModel> model_;
   scoped_ptr<base::TimeDelta> model_max_age_;